FFH scientific research papers database
FFH database search (1991-2022):
Balčiūnaitė, A.; Upadhyay, K. K.; Radinović, K.; Santos, D. M. F.; Montemor, M. F.; Šljukić, B.
Steps towards highly-efficient water splitting and oxygen reduction using nanostructured β-Ni(OH)2 Journal Article
In: RSC Advances, vol. 12, no. 16, pp. 10020-10028, 2022.
@article{Balčiūnaitė202210020,
title = {Steps towards highly-efficient water splitting and oxygen reduction using nanostructured β-Ni(OH)2},
author = {A. Balčiūnaitė and K. K. Upadhyay and K. Radinović and D. M. F. Santos and M. F. Montemor and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128728754&doi=10.1039%2fd2ra00914e&partnerID=40&md5=c8e77c4005438d6f0e8f7c4cd5baaa74},
doi = {10.1039/d2ra00914e},
year = {2022},
date = {2022-01-01},
journal = {RSC Advances},
volume = {12},
number = {16},
pages = {10020-10028},
abstract = {β-Ni(OH)2 nanoplatelets are prepared by a hydrothermal procedure and characterized by scanning and transmission electron microscopy, X-ray diffraction analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy. The material is demonstrated to be an efficient electrocatalyst for oxygen reduction, oxygen evolution, and hydrogen evolution reactions in alkaline media. β-Ni(OH)2 shows an overpotential of 498 mV to reach 10 mA cm−2 towards oxygen evolution, with a Tafel slope of 149 mV dec−1 (decreasing to 99 mV dec−1 at 75 °C), along with superior stability as evidenced by chronoamperometric measurements. Similarly, a low overpotential of −333 mV to reach 10 mA cm−2 (decreasing to only −65 mV at 75 °C) toward hydrogen evolution with a Tafel slope of −230 mV dec−1 is observed. Finally, β-Ni(OH)2 exhibits a noteworthy performance for the ORR, as evidenced by a low Tafel slope of −78 mV dec−1 and a number of exchanged electrons of 4.01 (indicating direct 4e−-oxygen reduction), whereas there are only a few previous reports on modest ORR activity of pure Ni(OH)2 © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bartolić, D.; Mojović, M.; Prokopijević, M.; Djikanović, D.; Kalauzi, A.; Mutavdžić, D.; Baošić, R.; Radotić, K.
Lignin and organic free radicals in maize (Zea mays L.) seeds in response to aflatoxin B1 contamination: an optical and EPR spectroscopic study Journal Article
In: Journal of the Science of Food and Agriculture, vol. 102, no. 6, pp. 2500-2505, 2022.
@article{Bartolić20222500,
title = {Lignin and organic free radicals in maize (Zea mays L.) seeds in response to aflatoxin B1 contamination: an optical and EPR spectroscopic study},
author = {D. Bartolić and M. Mojović and M. Prokopijević and D. Djikanović and A. Kalauzi and D. Mutavdžić and R. Baošić and K. Radotić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118771838&doi=10.1002%2fjsfa.11591&partnerID=40&md5=0c702ebc1e1f64180a75b337db6ff19a},
doi = {10.1002/jsfa.11591},
year = {2022},
date = {2022-01-01},
journal = {Journal of the Science of Food and Agriculture},
volume = {102},
number = {6},
pages = {2500-2505},
abstract = {BACKGROUND: Aflatoxin B1 (AFB1) is the most dangerous of the mycotoxins that contaminate cereal seeds naturally. A stress lignin formation is linked with the accumulation of reactive oxygen species causing a change in the redox status and formation of stable organic radicals, constituting the first layer of defense. The relationship between AFB1 and changes in lignin organic free radicals in seeds is not known, nor is the part of the seed that is more targeted. Using optical and electron paramagnetic resonance spectroscopy, we investigated AFB1-induced changes in lignin and organic free radicals in seeds, and whether the inner and outer seed fractions differ in response to increasing AFB1. RESULTS: Different changes in the content of lignin and free radicals with increasing AFB1 concentrations were observed in the two seed fractions. There was a significant positive linear correlation (R = 0.9923},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Karačić, D.; Gutić, S. J.; Vasić, B.; Mirsky, V. M.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
Electrochemical reduction of thin graphene-oxide films in aqueous solutions – Restoration of conductivity Journal Article
In: Electrochimica Acta, vol. 410, 2022.
@article{Karačić2022,
title = {Electrochemical reduction of thin graphene-oxide films in aqueous solutions – Restoration of conductivity},
author = {D. Karačić and S. J. Gutić and B. Vasić and V. M. Mirsky and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124489540&doi=10.1016%2fj.electacta.2022.140046&partnerID=40&md5=f9c21ca06b38066d123f026931636fe8},
doi = {10.1016/j.electacta.2022.140046},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {410},
abstract = {Graphene oxide finds applications in different fields of science, including energy conversion. Electrochemical reduction of graphene oxide (GO) significantly improves its conductivity. However, the kinetics of this process depends on the solvent, supporting electrolyte, pH, and numerous other factors. Most studies report the macroscopic views and ex-situ properties of reduced GO. To expand the knowledge about GO reduction, in this study, we used cyclic voltammetry (CV), simultaneous 2 points and 4 points resistance measurement (s24), conductive atomic force microscopy (AFM), and theoretical calculations. Using CV, we demonstrated that the choice of supporting electrolyte (KCl or LiCl) influences the potential range in which electrochemical GO reduction occurs. The activation energy of this process was estimated to be below 30 kJ mol‒1 in both electrolytes, being significantly lower than that required for thermal reduction of GO. Simultaneous in situ s24 resistance measurements suggest that GO films reach a highly conductive state at deep negative potentials, with an abrupt, irreversible switch from non-conductive to the conductive state. However, conductive AFM presents a more exact picture of this process: the reduction of GO films starts locally while the formed conductive islands grow during the reduction. This mechanism was confirmed by theoretical calculations indicating that the reduction starts on isolated oxygen-functional groups over the GO basal plane, while clustered OH groups are more difficult to reduce. The presented results can help in tailoring reduced GO for a particular electrochemical application by precisely controlling the reduction degree and percentage of the conductive area of the reduced GO films. © 2022 Elsevier Ltd},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Rupar, J.; Bajuk-Bogdanović, D.; Milojević-Rakić, M.; Krstić, J.; Upadhyay, K.; Gavrilov, N.; Ležaić, A. Janošević
Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors Journal Article
In: Microporous and Mesoporous Materials, vol. 335, 2022.
@article{Rupar2022,
title = {Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors},
author = {J. Rupar and D. Bajuk-Bogdanović and M. Milojević-Rakić and J. Krstić and K. Upadhyay and N. Gavrilov and A. Janošević Ležaić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125955960&doi=10.1016%2fj.micromeso.2022.111790&partnerID=40&md5=d011d2820b7cc0d740a44fb63e79dcc8},
doi = {10.1016/j.micromeso.2022.111790},
year = {2022},
date = {2022-01-01},
journal = {Microporous and Mesoporous Materials},
volume = {335},
abstract = {Here, we propose a novel, electrochemical preparation of in situ N-doped alginate-based carbon precursors with monodispersed zinc ions. Obtained carbons were evaluated by spectroscopic (FTIR, Raman and XPS), textural (N2 physisorption), microscopic (TEM) and elemental (SEM-EDS) descriptors to establish their distinctive features originating from different synthetic procedures. Carbons characteristics were assessed in view of several carbonization temperatures applied for their preparation from alginate precursors, and individual and joint effect of zinc and nitrogen on the precursor. Obtained Zn monodispersion, emphasizes the significance of electrochemical preparation, allowing increasing temperature to induce changes from its ionic form to carbonate and oxide, while at 800 °C ZnO further reduces and evaporates. Since homogeneously dispersed Zn species acts as porosity evolving agent during carbonization, a substantial surface area is developed, in the range 718–1056 m2 g−1. Textural properties revealed that the use of rivanol as an N-doping agent shields carbon scaffold from porosity overdevelopment. The alginate-based carbons are probed as electrode materials for supercapacitors and surface/textural properties connected to electrochemical results. Controlled electrochemical dispersion of zinc and, in situ N–doping with rivanol, developed a bio-based material of excellent capacitance (265 F g−1 @5 mV s−1) and stability. This study reflects key features in material design necessary for engineering upcoming supercapacitors. © 2022 Elsevier Inc.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kremenovic, A.; Grujic-Brojcin, M.; Tomic, N.; Lazovic, V.; Bajuk-Bogdanovic, D.; Krstic, J.; Scepanovic, M.
Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis Journal Article
In: Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, vol. 78, pp. 214-222, 2022.
@article{Kremenovic2022214,
title = {Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis},
author = {A. Kremenovic and M. Grujic-Brojcin and N. Tomic and V. Lazovic and D. Bajuk-Bogdanovic and J. Krstic and M. Scepanovic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128024948&doi=10.1107%2fS2052520622001731&partnerID=40&md5=9d6ab1cf458340d171fcafb7a2696ce8},
doi = {10.1107/S2052520622001731},
year = {2022},
date = {2022-01-01},
journal = {Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials},
volume = {78},
pages = {214-222},
abstract = {A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results for both anatase and brookite. The experimental Raman spectra of all the samples in the region 100-200 cm-1are dominated by a strong feature primarily composed of the most intense modes of anatase (Eg ) and brookite (A 1g ). The anatase crystallite sizes of 14-17 nm, estimated by XRPD, suggest the application of the phonon confinement model (PCM) for the analysis of the anatase Eg mode, whereas the relatively large brookite crystallite size (27-29 nm) does not imply the use of the PCM for the brookite A 1g mode. Superposition of the anatase Eg mode profile, calculated by the PCM, and the Lorentzian shape of the brookite A 1g mode provide an appropriate simulation of the change in the dominant Raman feature in the spectra of TiO2-based nanocomposites with carbon. Raman spectra measured in the high-frequency range (1000-2000 cm-1) provide information on carbon in the investigated nanocomposite materials. The results from field-emission scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy and nitrogen physisorption measurements support the XRPD and Raman results. © 2022 International Union of Crystallography. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kavitha, E.; Ramarajan, D.; Rakić, A.; Dimić, D.; Sudha, S.; Nirmala, P. N.
Structural, spectroscopic, quantum chemical, and molecular docking investigation of (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide Journal Article
In: Journal of Molecular Structure, vol. 1253, 2022.
@article{Kavitha2022,
title = {Structural, spectroscopic, quantum chemical, and molecular docking investigation of (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide},
author = {E. Kavitha and D. Ramarajan and A. Rakić and D. Dimić and S. Sudha and P. N. Nirmala},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123161444&doi=10.1016%2fj.molstruc.2021.132259&partnerID=40&md5=963ae66bf2ae65ea7153cee615d77a44},
doi = {10.1016/j.molstruc.2021.132259},
year = {2022},
date = {2022-01-01},
journal = {Journal of Molecular Structure},
volume = {1253},
abstract = {Schiff bases and hydrazides are groups of compounds with important biological activities. In this contribution, (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide (DBP) was synthesized and characterized by X-ray crystallography, IR, Raman, UV–vis and NMR spectroscopies. The Hirshfeld surface analysis was performed to investigate the interactions within the crystal package. The structure of DBP was optimized by several functionals (B3LYP, CAM-B3LYP, B3PW91, M05-2X, and M06-2X) in conjunction with the 6-311++G(d,p) basis set. The suitable level of theory was determined based on the comparison between experimental and theoretical bond lengths and angles (M06-2X/6-311++G(d,p)). The Natural Bond Orbital (NBO) and Quantum Theory of Atoms in Molecules (QTAIM) approaches were used for the quantification of the interaction strengths within a structure. The experimental IR and Raman peaks were assigned based on the calculated one, with the aid of the Potential Energy Distribution (PED) analysis. The 1H and 13C NMR signals were also assigned when compared to the calculated ones. The reproducibility of the experimental results proved that a suitable level of theory was obtained. The experimental UV–vis spectra consisted of a wide peak between 200 and 450 nm, while the most prominent theoretical transitions were located at 324, 231, and 213 nm. The nonlinear optical (NLO) studies Z-scan experiment allowed the determination of the nonlinear absorption coefficient and nonlinear refractive index, thus proving that DBP can be used as NLO material. Various reactivity descriptors of DBP and its analogs were computed and the reactivity was checked towards Cyclin-Dependent Kinase 2 protein, with the influence of structural parameters explained. © 2021 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Zdolšek, N.; Vujković, M.; Metin, Ö.; Brković, S.; Jocić, A.; Dimitrijević, A.; Trtić-Petrović, T.; Šljukić, B.
In: International Journal of Hydrogen Energy, vol. 47, no. 33, pp. 14847-14858, 2022.
@article{Zdolšek202214847,
title = {Boosting electrocatalysis of oxygen reduction and evolution reactions with cost-effective cobalt and nitrogen-doped carbons prepared by simple carbonization of ionic liquids},
author = {N. Zdolšek and M. Vujković and Ö. Metin and S. Brković and A. Jocić and A. Dimitrijević and T. Trtić-Petrović and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127337669&doi=10.1016%2fj.ijhydene.2022.02.225&partnerID=40&md5=bded053c51ef0c3fd2080196da7a797a},
doi = {10.1016/j.ijhydene.2022.02.225},
year = {2022},
date = {2022-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {47},
number = {33},
pages = {14847-14858},
abstract = {Development of cost-effective, bi-functional carbon electrocatalysts via direct carbonization of ionic liquids (bis(cholinium) tetrachlorocobaltate(II) ([Ch]2[CoCl4]) and bis(1-butyl-3-methylimidazolium) tetrachlorocobaltate(II) ([Bmim]2[CoCl4])) is reported herein for the first time. Carbon electrocatalysts, dual-doped with cobalt and nitrogen, were tested for oxygen reduction (ORR) and oxygen evolution (OER) reactions. Both materials show high bi-functional catalytic activity and excellent stability due to synergistic effects arising from the presence of nitrogen and cobalt. Electrocatalyst prepared by carbonization of [Ch]2[CoCl4] show exceptional activity and selectivity toward ORR. Conversely, electrocatalyst prepared from [Bmim]2[CoCl4] showed a slightly better OER performance indicating that different catalytic sites are responsible for O2 reduction and H2O oxidation. Parent CoO particles with graphitic nitrogen boost activity for ORR, while elemental Co supported by nitrogen atoms is responsible for OER activity. Finally, energy consumption during electrolytic oxygen production was calculated revealing energy saving when using two materials as anode electrocatalysts. © 2022 Hydrogen Energy Publications LLC},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dobrota, A. S.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
Surface pourbaix plots of M@N4-graphene single-atom electrocatalysts from density functional theory thermodynamic modeling Journal Article
In: Electrochimica Acta, vol. 412, 2022.
@article{Dobrota2022b,
title = {Surface pourbaix plots of M@N4-graphene single-atom electrocatalysts from density functional theory thermodynamic modeling},
author = {A. S. Dobrota and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125618598&doi=10.1016%2fj.electacta.2022.140155&partnerID=40&md5=e6e87bd485bdf8a612de6cc13de375b8},
doi = {10.1016/j.electacta.2022.140155},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {412},
abstract = {Single-atom catalysts (SACs) are rapidly developing in various application areas, including electrocatalysis of different reactions, usually taking place under harsh pH/electrode potential conditions. Thus, a full atomic-level understanding of the nature of the active sites under realistic electrochemical conditions is needed, having in mind that the state of SACs active centers could be altered by the adsorption of spectating species. In this contribution, Density Functional Theory is employed to conduct thermodynamic analysis of SACs with metal atoms (Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, or Au) embedded into N4 moiety in graphene. Various surface electrochemical processes on such SACs are considered, their Pourbaix plots are constructed, and their activity, selectivity, and stability under operating conditions are discussed. It is demonstrated how adsorption of H, O and OH can cause blockage and restructuring of the active sites and alter the electronic structure. Furthermore, when one deals with metals with lower D-band filling, it is shown that metal center oxidation is preferred over the oxidation of carbon lattice. The effect of the state of the metal center on the reactivity of the carbon lattice is discussed in the case of Fe@N4-graphene. Finally, a possible strategy for confirming the changes in the architecture of the SACs’ active site by analyzing their vibration spectra is suggested. © 2022 Elsevier Ltd},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Liu, Z.; McKay, A. I.; Zhao, L.; Forsyth, C. M.; Jevtović, V.; Petković, M.; Frenking, G.; Vidović, D.
Carbodiphosphorane-Stabilized Parent Dioxophosphorane: A Valuable Synthetic HO2P Source Journal Article
In: Journal of the American Chemical Society, vol. 144, no. 16, pp. 7357-7365, 2022.
@article{Liu20227357,
title = {Carbodiphosphorane-Stabilized Parent Dioxophosphorane: A Valuable Synthetic HO2P Source},
author = {Z. Liu and A. I. McKay and L. Zhao and C. M. Forsyth and V. Jevtović and M. Petković and G. Frenking and D. Vidović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128825682&doi=10.1021%2fjacs.2c00936&partnerID=40&md5=7f1a88df3d35b2fdbb192f500f7641da},
doi = {10.1021/jacs.2c00936},
year = {2022},
date = {2022-01-01},
journal = {Journal of the American Chemical Society},
volume = {144},
number = {16},
pages = {7357-7365},
abstract = {Introducing a small phosphorus-based fragment into other molecular entities via, for example, phosphorylation/phosphonylation is an important process in synthetic chemistry. One of the approaches to achieve this is by trapping and subsequently releasing extremely reactive phosphorus-based molecules such as dioxophosphoranes. In this work, electron-rich hexaphenylcarbodiphosphorane (CDP) was used to stabilize the least thermodynamically favorable isomer of HO2P to yield monomeric CDP·PHO2. The title compound was observed to be a quite versatile phosphonylating agent; that is, it showed a great ability to transfer, for the first time, the HPO2fragment to a number of substrates such as alcohols, amines, carboxylic acids, and water. Several phosphorous-based compounds that were generated using this synthetic approach were also isolated and characterized for the first time. According to the initial computational studies, the addition-elimination pathway was significantly more favorable than the corresponding elimination-addition route for "delivering" the HO2P unit in these reactions. © 2022 American Chemical Society. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jocić, A.; Breitenbach, S.; Pašti, I. A.; Unterweger, C.; Fürst, C.; Lazarević-Pašti, T.
Viscose-derived activated carbons as adsorbents for malathion, dimethoate, and chlorpyrifos—screening, trends, and analysis Journal Article
In: Environmental Science and Pollution Research, vol. 29, no. 23, pp. 35138-35149, 2022.
@article{Jocić202235138,
title = {Viscose-derived activated carbons as adsorbents for malathion, dimethoate, and chlorpyrifos—screening, trends, and analysis},
author = {A. Jocić and S. Breitenbach and I. A. Pašti and C. Unterweger and C. Fürst and T. Lazarević-Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123254291&doi=10.1007%2fs11356-022-18721-1&partnerID=40&md5=11ccedde5d997a89c9bcc90f0a614def},
doi = {10.1007/s11356-022-18721-1},
year = {2022},
date = {2022-01-01},
journal = {Environmental Science and Pollution Research},
volume = {29},
number = {23},
pages = {35138-35149},
abstract = {The release and accumulation of pesticides in the environment require the development of novel sustainable technologies for their removal. While adsorption is a classical approach, the design of new materials with enhanced adsorption properties could rationalize the remediation routes and decrease potential risks for their non-target organisms, including humans. More importantly, the use of adsorbents and their synthesis should be implemented in a sustainable and environmentally friendly manner. In this contribution, we studied the adsorption of organophosphorus pesticides (OPs) dimethoate, malathion, and chlorpyrifos on viscose fiber–derived activated carbon fibers (ACFs). The most efficient adsorption was found for chlorpyrifos, followed by malathion and dimethoate, while material properties were correlated with OP uptake. These ACFs are extremely efficient for chlorpyrifos adsorption, with experimentally observed adsorption capacitances reaching 240 mg g−1. Detailed analysis suggests that chlorpyrifos is physisorbed on ACF surfaces and that increased surface hydrophilicity reduces the uptake. Studied ACFs have great potential for practical application. They can reduce OPs’ concentrations to such levels that no acute neurotoxic effects of the studied OPs in spiked tap water samples are seen, even for starting concentrations up to 104 times higher than the allowed ones. Finally, this study presents possible guidance for developing even more efficient and environmentally friendly adsorbents for chlorpyrifos, the most toxic among studied OPs. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Petrovic, J.; Savovic, J.; Rankovic, D.; Kuzmanovic, M.
Quantitative Analysis of Coal by Laser-Induced Breakdown Spectroscopy Using TEA CO2 Laser as the Excitation Source Journal Article
In: Plasma Chemistry and Plasma Processing, vol. 42, no. 3, pp. 519-533, 2022.
@article{Petrovic2022519,
title = {Quantitative Analysis of Coal by Laser-Induced Breakdown Spectroscopy Using TEA CO2 Laser as the Excitation Source},
author = {J. Petrovic and J. Savovic and D. Rankovic and M. Kuzmanovic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124537756&doi=10.1007%2fs11090-022-10234-6&partnerID=40&md5=3c1505d7a445fceea1ddca8a6a522181},
doi = {10.1007/s11090-022-10234-6},
year = {2022},
date = {2022-01-01},
journal = {Plasma Chemistry and Plasma Processing},
volume = {42},
number = {3},
pages = {519-533},
abstract = {This work presents a study of the applicability of laser-induced breakdown spectroscopy based on infrared transversally excited atmospheric CO2 pulsed laser for quantitative analysis of main inorganic elements in lignite coals. Calibration standards were prepared by mixing and pelleting an appropriate amount of rock reference material and graphite. Time-integrated spatially resolved measurements of analyte spectra of standard samples were used to construct univariate calibration curves of Al, Si, Ca, Fe and Mg. The spectral intensities of analytical lines were normalized by the carbon spectral line to compensate for the shot-to-shot fluctuation of plasma parameters. The obtained curves of growth have good linearity in a wide range of concentrations (up to 1% for Al and 3% for Si). Correlation coefficients were in the range of 0.955–0.993, depending on the element. Measured limits of detection (from 2.4 to 25 ppm for analyzed metals and 61 ppm for Si) are low enough to control the coal combustion process in power plants. The Stark-broadening and the Boltzmann plot method were used to determine apparent values of excitation temperatures and electron number densities. A relatively small but measurable influence of the concentration of metal elements on the plasma parameters was observed, which should be considered in quantitative analysis of coal samples with higher inorganic elements content. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ležaić, A. Janošević; Pašti, I.; Gledović, A.; Antić-Stanković, J.; Božić, D.; Uskoković-Marković, S.; Ćirić-Marjanović, G.
Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities Journal Article
In: Synthetic Metals, vol. 286, 2022.
@article{JanoševićLežaić2022,
title = {Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities},
author = {A. Janošević Ležaić and I. Pašti and A. Gledović and J. Antić-Stanković and D. Božić and S. Uskoković-Marković and G. Ćirić-Marjanović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125835685&doi=10.1016%2fj.synthmet.2022.117048&partnerID=40&md5=2291639b0a299ff7ce18819fba9c6542},
doi = {10.1016/j.synthmet.2022.117048},
year = {2022},
date = {2022-01-01},
journal = {Synthetic Metals},
volume = {286},
abstract = {Novel electroactive PANI-GA micro/nanostructured functional copolymers/co-oligomers were synthesized by the oxidative copolymerization of aniline and gallic acid (GA) in an aqueous solution, using ammonium peroxydisulfate (APS) as an oxidant and different initial mole ratios of GA to aniline ([GA]/[aniline]=0.1, 0.25, 0.5 and 1.0). It was found that the yield, molecular structure, morphology, electrical conductivity, electrochemical behavior, antioxidant and antimicrobial properties of PANI-GA strongly depend on [GA]/[aniline] ratio. The highest conductivity (3.8 × 10–3 S cm−1) showed PANI-GA with dominant polyaniline (PANI) emeraldine salt segments and nanorod morphology, synthesized at [GA]/[aniline] = 0.1. FTIR spectroscopy confirmed the presence of covalently bonded GA and PANI-type structural segments in PANI-GA. The antioxidant activity of PANI-GA was explored by the spectrophotometric 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and electrochemical test for superoxide anion radical, •O2−. All protonated PANI-GA showed good scavenging activity toward ABTS•+ and •O2− radicals, whereby the highest activity exhibited PANI-GA produced at [GA]/[aniline] = 1. The radical scavenging activity of protonated PANI-GA samples toward ABTS•+ was much higher than that of PANI. The antimicrobial properties of the PANI-GA against bacteria S. aureus and E. coli, as well as against fungus C. albicans were evaluated. All synthesized protonated PANI-GA were more effective as S. aureus growth inhibitors than pristine GA and PANI. Highest effectiveness against E. coli and C. albicans, higher than that of pristine GA and PANI, showed conductive PANI-GA synthesized at [GA]/[aniline]= 0.1. Based on the obtained experimental results the mechanism of GA and aniline oxidative copolymerization is proposed. © 2022 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Popadić, D.; Gavrilov, N.; Ignjatović, L.; Krajišnik, D.; Mentus, S.; Milojević-Rakić, M.; Bajuk-Bogdanović, D.
How to Obtain Maximum Environmental Applicability from Natural Silicates Journal Article
In: Catalysts, vol. 12, no. 5, 2022.
@article{Popadić2022,
title = {How to Obtain Maximum Environmental Applicability from Natural Silicates},
author = {D. Popadić and N. Gavrilov and L. Ignjatović and D. Krajišnik and S. Mentus and M. Milojević-Rakić and D. Bajuk-Bogdanović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129371491&doi=10.3390%2fcatal12050519&partnerID=40&md5=931d4fab56896d8013cc0864f61733ea},
doi = {10.3390/catal12050519},
year = {2022},
date = {2022-01-01},
journal = {Catalysts},
volume = {12},
number = {5},
abstract = {Unmodified natural silicates (bentonite, kaolin, clinoptilolite and diatomites) were tested as adsorbents for the organic pollutants in water tables using Methylene Blue (MB) as the model adsorbate. Among the selected materials, bentonite adsorbed as much as 237 mg/g, confirming its excellent suitability for pollutant removal. Spectral evidence confirmed successful MB immobilization at the bentonite surface. Furthermore, the thermal treatment of MB-saturated adsorbent in an inert atmosphere at 700◦C produced a carbon/silicate composite. EDX confirmed the formation of the nitrogen-doped carbon overlay on the silica scaffold and the obtained composite material was probed as an electrode material for oxygen reduction in an alkaline solution. Reduction proceeded via a two-electron mechanism with the main product being HO2−, a known nucleophile, which was subsequently used to degrade/demethylate MB. The composite showed a considerable 70% MB removal rate after an hour of electrochemical treatment. The synergy between the processes of adsorption of MB and the surface-generated HO2− dictates the efficiency of the method and points to a possible route for spent adsorbent reuse in the form of a durable product for environmental protection. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Slavković-Beškoski, L.; Ignjatović, L.; Bolognesi, G.; Maksin, D.; Savić, A.; Vladisavljević, G.; Onjia, A.
In: Metals, vol. 12, no. 5, 2022.
@article{Slavković-Beškoski2022,
title = {Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate},
author = {L. Slavković-Beškoski and L. Ignjatović and G. Bolognesi and D. Maksin and A. Savić and G. Vladisavljević and A. Onjia},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129429603&doi=10.3390%2fmet12050791&partnerID=40&md5=7462526eed048fdff76965ad1b54fc94},
doi = {10.3390/met12050791},
year = {2022},
date = {2022-01-01},
journal = {Metals},
volume = {12},
number = {5},
abstract = {A dispersive solid-phase microextraction (DSPME) sorbent consisting of poly(1,6-hexanedi-ol diacrylate)-based polymer microspheres, with embedded graphene microparticles (poly(HDDA)/g-raphene), was synthesized by microfluidic emulsification/photopolymerization and characterized by optical microscopy and X-ray fluorescence spectrometry. This sorbent was applied for simple, fast, and sensitive vortex-assisted DSPME of rare earth elements (RREs) in coal fly ash (CFA) leachate, prior to their quantification by inductively coupled plasma mass spectrometry (ICP-MS). Among nine DSPME variables, the Plackett–Burman screening design (PBD), followed by the central composite optimization design (CCD) using the Derringer desirability function (D), identified the eluent type as the most influencing DSPME variable. The optimum conditions with maximum D (0.65) for the chelating agent di-(2-ethylhexyl) phosphoric acid (D2EHPA) amount, the sorbent amount, the eluting solvent, the extraction temperature, the centrifuge speed, the vortexing time, the elution time, the centrifugation time, and pH, were set to 60 µL, 30 mg, 2 M HNO3, 25◦ C, 6000 rpm, 1 min, 1 min, 5 min, and 4.2, respectively. Analytical validation of the DSPME method for 16 REEs (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in CFA leachate samples estimated the detection limits at the low ppt level, the recovery range 43–112%, and relative standard deviation within ± 22%. This method was applied to a water extraction procedure (EP) and acetic acid toxicity characteristic leaching procedure (TCLP) for leachate of CFA, from five different coal-fired thermoelectric power plants. The most abundant REEs in leachate (20 ÷ 1 solid-to-liquid ratio) are Ce, Y, and La, which were found in the range of 22–194 ng/L, 35–105 ng/L, 48–95 ng/L, and 9.6–51 µg/L, 7.3–22 µg/L, 2.4–17 µg/L, for EP and TCLP leachate, respectively. The least present REE in TCLP leachate was Lu (42–125 ng/L), which was not detected in EP leachate. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Radinović, K.; Mladenović, D.; Milikić, J.; Alsaiari, M.; Harraz, F. A.; Santos, D. M. F.; Šljukić, B.
Tuning Electrocatalytic Activity of Gold Silver Nanoparticles on Reduced Graphene Oxide for Oxygen Reduction Reaction Journal Article
In: Journal of the Electrochemical Society, vol. 169, no. 5, 2022.
@article{Radinović2022,
title = {Tuning Electrocatalytic Activity of Gold Silver Nanoparticles on Reduced Graphene Oxide for Oxygen Reduction Reaction},
author = {K. Radinović and D. Mladenović and J. Milikić and M. Alsaiari and F. A. Harraz and D. M. F. Santos and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131117867&doi=10.1149%2f1945-7111%2fac67b7&partnerID=40&md5=c0185941629c8457ab4eada8594b55cb},
doi = {10.1149/1945-7111/ac67b7},
year = {2022},
date = {2022-01-01},
journal = {Journal of the Electrochemical Society},
volume = {169},
number = {5},
abstract = {Gold-silver (AuAg) nanoparticles were deposited on reduced graphene oxide (rGO), with Au wt% varying from 34.6 to 46.2 and Ag wt% ranging from 31.7 to 35.3. Three AuAg/rGO samples were characterized by inductively coupled plasma optical emission spectroscopy, transmission and scanning electron microscopy with energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis. Subsequently, AuAg/rGO materials were studied using the rotating disk electrode as electrocatalysts for oxygen reduction reaction (ORR) for potential application in alkaline fuel cells. AuAg/rGO-3 (with ca. 34.6 wt% Au and 35.3 wt% Ag) showed the most promising performance, with high ORR activity and good stability, as evidenced by the highest current density (−4.45 mA cm−2 at 0.5 V), the lowest Tafel slope (103 mV dec−1), and the highest number of electrons exchanged (4.1). © 2022 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Cvjetan, N.; Kissner, R.; Bajuk-Bogdanović, D.; Ćirić-Marjanović, G.; Walde, P.
In: RSC Advances, vol. 12, no. 21, pp. 13154-13167, 2022.
@article{Cvjetan202213154,
title = {Hemin-catalyzed oxidative oligomerization of p-aminodiphenylamine (PADPA) in the presence of aqueous sodium dodecylbenzenesulfonate (SDBS) micelles},
author = {N. Cvjetan and R. Kissner and D. Bajuk-Bogdanović and G. Ćirić-Marjanović and P. Walde},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130096783&doi=10.1039%2fd2ra02198f&partnerID=40&md5=c08610ec35cdec41b274eb4c251889df},
doi = {10.1039/d2ra02198f},
year = {2022},
date = {2022-01-01},
journal = {RSC Advances},
volume = {12},
number = {21},
pages = {13154-13167},
abstract = {In a previous report on the enzymatic synthesis of the conductive emeraldine salt form of polyaniline (PANI-ES) in aqueous solution using PADPA (p-aminodiphenylamine) as monomer, horseradish peroxidase isoenzyme C (HRPC) was applied as a catalyst at pH = 4.3 with H2O2 as a terminal oxidant. In that work, anionic vesicles were added to the reaction mixture for (i) guiding the reaction to obtain poly(PADPA) products that resemble PANI-ES, and for (ii) preventing product precipitation (known as the “template effect”). In the work now presented, instead of native HRPC, only its prosthetic group ferric heme b (= hemin) was utilized as a catalyst, and micelles formed from SDBS (sodium dodecylbenzenesulfonate) served as templates. For the elaborated optimal reaction conditions, complementary UV/vis/NIR, EPR, and Raman spectroscopy measurements clearly showed that the reaction mixture obtained after completion of the reaction contained PANI-ES-like products as dominating species, very similar to the products formed with HRPC as catalyst. HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonate) was found to have a positive effect on the reaction rate as compared to dihydrogenphosphate. This work is the first on the template-assisted formation of PANI-ES type products under mild, environmentally friendly conditions using hemin as a cost-effective catalyst. © 2022 The Royal Society of Chemistry},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jovanović, A. Z.; Bijelić, L.; Dobrota, A. S.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
In: Electrochimica Acta, vol. 414, 2022.
@article{Jovanović2022b,
title = {Enhancement of hydrogen evolution reaction kinetics in alkaline media by fast galvanic displacement of nickel with rhodium – From smooth surfaces to electrodeposited nickel foams},
author = {A. Z. Jovanović and L. Bijelić and A. S. Dobrota and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126534460&doi=10.1016%2fj.electacta.2022.140214&partnerID=40&md5=18ad57813b9058cad68329bebcb81848},
doi = {10.1016/j.electacta.2022.140214},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {414},
abstract = {Energy-efficient hydrogen production is one of the key factors for advancing hydrogen-based economy. Alkaline water electrolysis is the main route for the production of high-purity hydrogen, but further improvements of hydrogen evolution reaction (HER) catalysts are still needed. Industrial alkaline electrolysis relies on Ni-based catalysts, and here we describe a drastic improvement of HER activity of Ni in alkaline media using several model catalysts for HER, obtained upon nickel surface modification in the aqueous solution of rhodium salts, where a spontaneous deposition of rhodium takes place, based on the chemical displacement reaction 3Ni + 2Rh3+ = 3Ni2+ + 2Rh. In the case of smooth Ni-poly electrodes, HER activity surpasses the activity of Pt-poly after just 30 s of exchange with Rh. SEM analysis showed that Rh is uniformly distributed, and that surface roughness changes are lower than 10%, which is in agreement with the electrochemical measurements. Furthermore, XPS analysis has shown effective incorporation of Rh in the surface, while DFT calculations suggest that hydrogen binding is significantly weakened on the Rh-modified Ni surfaces. Such tuning of the hydrogen binding energy is seen as the main factor governing HER activity improvements. The same galvanic displacement protocols were employed for nickel foam electrodes and electrodeposited Ni on Ti mesh. In both cases, somewhat longer Rh exchange times are needed to obtain superior activities than for the smooth Ni surface, but within 10 min. HER overpotentials corresponding to −10 mA cm−2 for nickel foam and electrodeposited Ni electrodes, after modification with Rh, amounted to only −0.07 and −0.09 V, respectively. Thus, it is suggested that a fast spontaneous displacement of Ni with Rh could effectively boost HER in alkaline media with minor cost penalties with regards to energy saving in the electrolysis process. © 2022},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Milovanović, B.; Novak, J.; Etinski, M.; Domcke, W.; Došlić, N.
On the propensity of formation of cyclobutane dimers in face-to-face and face-to-back uracil stacks in solution Journal Article
In: Physical Chemistry Chemical Physics, vol. 24, no. 24, pp. 14836-14845, 2022.
@article{Milovanović202214836,
title = {On the propensity of formation of cyclobutane dimers in face-to-face and face-to-back uracil stacks in solution},
author = {B. Milovanović and J. Novak and M. Etinski and W. Domcke and N. Došlić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132210991&doi=10.1039%2fd2cp00495j&partnerID=40&md5=0014105330789b9848309d9a174f56a2},
doi = {10.1039/d2cp00495j},
year = {2022},
date = {2022-01-01},
journal = {Physical Chemistry Chemical Physics},
volume = {24},
number = {24},
pages = {14836-14845},
abstract = {UV irradiation of RNA leads to the formation of intra- and inter-strand crosslinks of cyclobutane type. Despite the importance of this reaction, relatively little is known about how the mutual orientation of the two bases affects the outcome of the reaction. Here we report a comparative nonadiabatic molecular dynamics study of face-to-back (F2B) and face-to-face (F2F) stacked uracil-water clusters. The computations were performed using the second-order algebraic-diagrammatic-construction (ADC(2)) method. We found that F2B stacked uracil-water clusters either relax non-reactively to the ground state by an ethylenic twist around the C = C bond or remain in the lowest nπ* state in which the two bases gradually move away from each other. This finding is consistent with the low propensity for the formation of intra-strand cyclobutane dimers between adjacent RNA bases. On the contrary, in F2F stacked uracil-water clusters, in addition to non-reactive deactivation, we found a pro-reactive deactivation pathway, which may lead to the formation of cyclobutane uracil dimers in the electronic ground state. On a qualitative level, the observed photodynamics of F2F stacked uracil-water clusters explains the greater propensity of RNA to form inter-strand cyclobutane-type crosslinks. © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D.; Taylor, A. F.; Bubanja, I. N.
Coupling between nucleation and chemical reactions and its importance in understanding the oxidation of iodine by hydrogen peroxide Journal Article
In: Physical Chemistry Chemical Physics, vol. 24, no. 22, pp. 14022-14032, 2022.
@article{Stanisavljev202214022,
title = {Coupling between nucleation and chemical reactions and its importance in understanding the oxidation of iodine by hydrogen peroxide},
author = {D. Stanisavljev and A. F. Taylor and I. N. Bubanja},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131641709&doi=10.1039%2fd2cp00962e&partnerID=40&md5=93d61609b0c47b050be82f40eb5da7ff},
doi = {10.1039/d2cp00962e},
year = {2022},
date = {2022-01-01},
journal = {Physical Chemistry Chemical Physics},
volume = {24},
number = {22},
pages = {14022-14032},
abstract = {We have investigated the reaction of iodine with hydrogen peroxide coupled to gas nucleation. A step-like increase in the nucleation rate with increasing amounts of dissolved oxygen can act as a trigger for the formation of highly reactive components and complete oxidation of iodine to iodate despite the large thermodynamic barrier for the whole process. Energetic coupling of nucleation with chemical reactions is based on local redistribution of energy by collapsing unstable nuclei. The developed model correctly describes the evolution of the measured reaction parameters. It offers a conceptual improvement of formal-kinetic models by drawing attention to important contributions of physical effects to the reaction mechanism. © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Negrojević, L.; Lončar, A.; Maksimović, J.; Anić, S.; Čupić, Ž.; Kolar-Anić, L.; Pejić, N.
Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine Journal Article
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 135, no. 3, pp. 1147-1162, 2022.
@article{Negrojević20221147,
title = {Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine},
author = {L. Negrojević and A. Lončar and J. Maksimović and S. Anić and Ž. Čupić and L. Kolar-Anić and N. Pejić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122412741&doi=10.1007%2fs11144-021-02130-5&partnerID=40&md5=8115c1ccfed4bd65250dea3e3daf020b},
doi = {10.1007/s11144-021-02130-5},
year = {2022},
date = {2022-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {135},
number = {3},
pages = {1147-1162},
abstract = {A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, ∆τ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10−6 − 9.2 × 10−6 mol L−1 and 1.1 × 10−6 − 1.4 × 10−5 mol L−1, with the limit of detections of 6.6 × 10−7 mol L−1 and 6.4 × 10−7 mol L−1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed. © 2021, Akadémiai Kiadó, Budapest, Hungary.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
2022
Balčiūnaitė, A.; Upadhyay, K. K.; Radinović, K.; Santos, D. M. F.; Montemor, M. F.; Šljukić, B.
Steps towards highly-efficient water splitting and oxygen reduction using nanostructured β-Ni(OH)2 Journal Article
In: RSC Advances, vol. 12, no. 16, pp. 10020-10028, 2022.
@article{Balčiūnaitė202210020,
title = {Steps towards highly-efficient water splitting and oxygen reduction using nanostructured β-Ni(OH)2},
author = {A. Balčiūnaitė and K. K. Upadhyay and K. Radinović and D. M. F. Santos and M. F. Montemor and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128728754&doi=10.1039%2fd2ra00914e&partnerID=40&md5=c8e77c4005438d6f0e8f7c4cd5baaa74},
doi = {10.1039/d2ra00914e},
year = {2022},
date = {2022-01-01},
journal = {RSC Advances},
volume = {12},
number = {16},
pages = {10020-10028},
abstract = {β-Ni(OH)2 nanoplatelets are prepared by a hydrothermal procedure and characterized by scanning and transmission electron microscopy, X-ray diffraction analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy. The material is demonstrated to be an efficient electrocatalyst for oxygen reduction, oxygen evolution, and hydrogen evolution reactions in alkaline media. β-Ni(OH)2 shows an overpotential of 498 mV to reach 10 mA cm−2 towards oxygen evolution, with a Tafel slope of 149 mV dec−1 (decreasing to 99 mV dec−1 at 75 °C), along with superior stability as evidenced by chronoamperometric measurements. Similarly, a low overpotential of −333 mV to reach 10 mA cm−2 (decreasing to only −65 mV at 75 °C) toward hydrogen evolution with a Tafel slope of −230 mV dec−1 is observed. Finally, β-Ni(OH)2 exhibits a noteworthy performance for the ORR, as evidenced by a low Tafel slope of −78 mV dec−1 and a number of exchanged electrons of 4.01 (indicating direct 4e−-oxygen reduction), whereas there are only a few previous reports on modest ORR activity of pure Ni(OH)2 © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bartolić, D.; Mojović, M.; Prokopijević, M.; Djikanović, D.; Kalauzi, A.; Mutavdžić, D.; Baošić, R.; Radotić, K.
Lignin and organic free radicals in maize (Zea mays L.) seeds in response to aflatoxin B1 contamination: an optical and EPR spectroscopic study Journal Article
In: Journal of the Science of Food and Agriculture, vol. 102, no. 6, pp. 2500-2505, 2022.
@article{Bartolić20222500,
title = {Lignin and organic free radicals in maize (Zea mays L.) seeds in response to aflatoxin B1 contamination: an optical and EPR spectroscopic study},
author = {D. Bartolić and M. Mojović and M. Prokopijević and D. Djikanović and A. Kalauzi and D. Mutavdžić and R. Baošić and K. Radotić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118771838&doi=10.1002%2fjsfa.11591&partnerID=40&md5=0c702ebc1e1f64180a75b337db6ff19a},
doi = {10.1002/jsfa.11591},
year = {2022},
date = {2022-01-01},
journal = {Journal of the Science of Food and Agriculture},
volume = {102},
number = {6},
pages = {2500-2505},
abstract = {BACKGROUND: Aflatoxin B1 (AFB1) is the most dangerous of the mycotoxins that contaminate cereal seeds naturally. A stress lignin formation is linked with the accumulation of reactive oxygen species causing a change in the redox status and formation of stable organic radicals, constituting the first layer of defense. The relationship between AFB1 and changes in lignin organic free radicals in seeds is not known, nor is the part of the seed that is more targeted. Using optical and electron paramagnetic resonance spectroscopy, we investigated AFB1-induced changes in lignin and organic free radicals in seeds, and whether the inner and outer seed fractions differ in response to increasing AFB1. RESULTS: Different changes in the content of lignin and free radicals with increasing AFB1 concentrations were observed in the two seed fractions. There was a significant positive linear correlation (R = 0.9923},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Karačić, D.; Gutić, S. J.; Vasić, B.; Mirsky, V. M.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
Electrochemical reduction of thin graphene-oxide films in aqueous solutions – Restoration of conductivity Journal Article
In: Electrochimica Acta, vol. 410, 2022.
@article{Karačić2022,
title = {Electrochemical reduction of thin graphene-oxide films in aqueous solutions – Restoration of conductivity},
author = {D. Karačić and S. J. Gutić and B. Vasić and V. M. Mirsky and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124489540&doi=10.1016%2fj.electacta.2022.140046&partnerID=40&md5=f9c21ca06b38066d123f026931636fe8},
doi = {10.1016/j.electacta.2022.140046},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {410},
abstract = {Graphene oxide finds applications in different fields of science, including energy conversion. Electrochemical reduction of graphene oxide (GO) significantly improves its conductivity. However, the kinetics of this process depends on the solvent, supporting electrolyte, pH, and numerous other factors. Most studies report the macroscopic views and ex-situ properties of reduced GO. To expand the knowledge about GO reduction, in this study, we used cyclic voltammetry (CV), simultaneous 2 points and 4 points resistance measurement (s24), conductive atomic force microscopy (AFM), and theoretical calculations. Using CV, we demonstrated that the choice of supporting electrolyte (KCl or LiCl) influences the potential range in which electrochemical GO reduction occurs. The activation energy of this process was estimated to be below 30 kJ mol‒1 in both electrolytes, being significantly lower than that required for thermal reduction of GO. Simultaneous in situ s24 resistance measurements suggest that GO films reach a highly conductive state at deep negative potentials, with an abrupt, irreversible switch from non-conductive to the conductive state. However, conductive AFM presents a more exact picture of this process: the reduction of GO films starts locally while the formed conductive islands grow during the reduction. This mechanism was confirmed by theoretical calculations indicating that the reduction starts on isolated oxygen-functional groups over the GO basal plane, while clustered OH groups are more difficult to reduce. The presented results can help in tailoring reduced GO for a particular electrochemical application by precisely controlling the reduction degree and percentage of the conductive area of the reduced GO films. © 2022 Elsevier Ltd},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Rupar, J.; Bajuk-Bogdanović, D.; Milojević-Rakić, M.; Krstić, J.; Upadhyay, K.; Gavrilov, N.; Ležaić, A. Janošević
Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors Journal Article
In: Microporous and Mesoporous Materials, vol. 335, 2022.
@article{Rupar2022,
title = {Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors},
author = {J. Rupar and D. Bajuk-Bogdanović and M. Milojević-Rakić and J. Krstić and K. Upadhyay and N. Gavrilov and A. Janošević Ležaić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125955960&doi=10.1016%2fj.micromeso.2022.111790&partnerID=40&md5=d011d2820b7cc0d740a44fb63e79dcc8},
doi = {10.1016/j.micromeso.2022.111790},
year = {2022},
date = {2022-01-01},
journal = {Microporous and Mesoporous Materials},
volume = {335},
abstract = {Here, we propose a novel, electrochemical preparation of in situ N-doped alginate-based carbon precursors with monodispersed zinc ions. Obtained carbons were evaluated by spectroscopic (FTIR, Raman and XPS), textural (N2 physisorption), microscopic (TEM) and elemental (SEM-EDS) descriptors to establish their distinctive features originating from different synthetic procedures. Carbons characteristics were assessed in view of several carbonization temperatures applied for their preparation from alginate precursors, and individual and joint effect of zinc and nitrogen on the precursor. Obtained Zn monodispersion, emphasizes the significance of electrochemical preparation, allowing increasing temperature to induce changes from its ionic form to carbonate and oxide, while at 800 °C ZnO further reduces and evaporates. Since homogeneously dispersed Zn species acts as porosity evolving agent during carbonization, a substantial surface area is developed, in the range 718–1056 m2 g−1. Textural properties revealed that the use of rivanol as an N-doping agent shields carbon scaffold from porosity overdevelopment. The alginate-based carbons are probed as electrode materials for supercapacitors and surface/textural properties connected to electrochemical results. Controlled electrochemical dispersion of zinc and, in situ N–doping with rivanol, developed a bio-based material of excellent capacitance (265 F g−1 @5 mV s−1) and stability. This study reflects key features in material design necessary for engineering upcoming supercapacitors. © 2022 Elsevier Inc.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kremenovic, A.; Grujic-Brojcin, M.; Tomic, N.; Lazovic, V.; Bajuk-Bogdanovic, D.; Krstic, J.; Scepanovic, M.
Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis Journal Article
In: Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, vol. 78, pp. 214-222, 2022.
@article{Kremenovic2022214,
title = {Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis},
author = {A. Kremenovic and M. Grujic-Brojcin and N. Tomic and V. Lazovic and D. Bajuk-Bogdanovic and J. Krstic and M. Scepanovic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128024948&doi=10.1107%2fS2052520622001731&partnerID=40&md5=9d6ab1cf458340d171fcafb7a2696ce8},
doi = {10.1107/S2052520622001731},
year = {2022},
date = {2022-01-01},
journal = {Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials},
volume = {78},
pages = {214-222},
abstract = {A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results for both anatase and brookite. The experimental Raman spectra of all the samples in the region 100-200 cm-1are dominated by a strong feature primarily composed of the most intense modes of anatase (Eg ) and brookite (A 1g ). The anatase crystallite sizes of 14-17 nm, estimated by XRPD, suggest the application of the phonon confinement model (PCM) for the analysis of the anatase Eg mode, whereas the relatively large brookite crystallite size (27-29 nm) does not imply the use of the PCM for the brookite A 1g mode. Superposition of the anatase Eg mode profile, calculated by the PCM, and the Lorentzian shape of the brookite A 1g mode provide an appropriate simulation of the change in the dominant Raman feature in the spectra of TiO2-based nanocomposites with carbon. Raman spectra measured in the high-frequency range (1000-2000 cm-1) provide information on carbon in the investigated nanocomposite materials. The results from field-emission scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy and nitrogen physisorption measurements support the XRPD and Raman results. © 2022 International Union of Crystallography. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kavitha, E.; Ramarajan, D.; Rakić, A.; Dimić, D.; Sudha, S.; Nirmala, P. N.
Structural, spectroscopic, quantum chemical, and molecular docking investigation of (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide Journal Article
In: Journal of Molecular Structure, vol. 1253, 2022.
@article{Kavitha2022,
title = {Structural, spectroscopic, quantum chemical, and molecular docking investigation of (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide},
author = {E. Kavitha and D. Ramarajan and A. Rakić and D. Dimić and S. Sudha and P. N. Nirmala},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123161444&doi=10.1016%2fj.molstruc.2021.132259&partnerID=40&md5=963ae66bf2ae65ea7153cee615d77a44},
doi = {10.1016/j.molstruc.2021.132259},
year = {2022},
date = {2022-01-01},
journal = {Journal of Molecular Structure},
volume = {1253},
abstract = {Schiff bases and hydrazides are groups of compounds with important biological activities. In this contribution, (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide (DBP) was synthesized and characterized by X-ray crystallography, IR, Raman, UV–vis and NMR spectroscopies. The Hirshfeld surface analysis was performed to investigate the interactions within the crystal package. The structure of DBP was optimized by several functionals (B3LYP, CAM-B3LYP, B3PW91, M05-2X, and M06-2X) in conjunction with the 6-311++G(d,p) basis set. The suitable level of theory was determined based on the comparison between experimental and theoretical bond lengths and angles (M06-2X/6-311++G(d,p)). The Natural Bond Orbital (NBO) and Quantum Theory of Atoms in Molecules (QTAIM) approaches were used for the quantification of the interaction strengths within a structure. The experimental IR and Raman peaks were assigned based on the calculated one, with the aid of the Potential Energy Distribution (PED) analysis. The 1H and 13C NMR signals were also assigned when compared to the calculated ones. The reproducibility of the experimental results proved that a suitable level of theory was obtained. The experimental UV–vis spectra consisted of a wide peak between 200 and 450 nm, while the most prominent theoretical transitions were located at 324, 231, and 213 nm. The nonlinear optical (NLO) studies Z-scan experiment allowed the determination of the nonlinear absorption coefficient and nonlinear refractive index, thus proving that DBP can be used as NLO material. Various reactivity descriptors of DBP and its analogs were computed and the reactivity was checked towards Cyclin-Dependent Kinase 2 protein, with the influence of structural parameters explained. © 2021 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Zdolšek, N.; Vujković, M.; Metin, Ö.; Brković, S.; Jocić, A.; Dimitrijević, A.; Trtić-Petrović, T.; Šljukić, B.
In: International Journal of Hydrogen Energy, vol. 47, no. 33, pp. 14847-14858, 2022.
@article{Zdolšek202214847,
title = {Boosting electrocatalysis of oxygen reduction and evolution reactions with cost-effective cobalt and nitrogen-doped carbons prepared by simple carbonization of ionic liquids},
author = {N. Zdolšek and M. Vujković and Ö. Metin and S. Brković and A. Jocić and A. Dimitrijević and T. Trtić-Petrović and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127337669&doi=10.1016%2fj.ijhydene.2022.02.225&partnerID=40&md5=bded053c51ef0c3fd2080196da7a797a},
doi = {10.1016/j.ijhydene.2022.02.225},
year = {2022},
date = {2022-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {47},
number = {33},
pages = {14847-14858},
abstract = {Development of cost-effective, bi-functional carbon electrocatalysts via direct carbonization of ionic liquids (bis(cholinium) tetrachlorocobaltate(II) ([Ch]2[CoCl4]) and bis(1-butyl-3-methylimidazolium) tetrachlorocobaltate(II) ([Bmim]2[CoCl4])) is reported herein for the first time. Carbon electrocatalysts, dual-doped with cobalt and nitrogen, were tested for oxygen reduction (ORR) and oxygen evolution (OER) reactions. Both materials show high bi-functional catalytic activity and excellent stability due to synergistic effects arising from the presence of nitrogen and cobalt. Electrocatalyst prepared by carbonization of [Ch]2[CoCl4] show exceptional activity and selectivity toward ORR. Conversely, electrocatalyst prepared from [Bmim]2[CoCl4] showed a slightly better OER performance indicating that different catalytic sites are responsible for O2 reduction and H2O oxidation. Parent CoO particles with graphitic nitrogen boost activity for ORR, while elemental Co supported by nitrogen atoms is responsible for OER activity. Finally, energy consumption during electrolytic oxygen production was calculated revealing energy saving when using two materials as anode electrocatalysts. © 2022 Hydrogen Energy Publications LLC},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dobrota, A. S.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
Surface pourbaix plots of M@N4-graphene single-atom electrocatalysts from density functional theory thermodynamic modeling Journal Article
In: Electrochimica Acta, vol. 412, 2022.
@article{Dobrota2022b,
title = {Surface pourbaix plots of M@N4-graphene single-atom electrocatalysts from density functional theory thermodynamic modeling},
author = {A. S. Dobrota and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125618598&doi=10.1016%2fj.electacta.2022.140155&partnerID=40&md5=e6e87bd485bdf8a612de6cc13de375b8},
doi = {10.1016/j.electacta.2022.140155},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {412},
abstract = {Single-atom catalysts (SACs) are rapidly developing in various application areas, including electrocatalysis of different reactions, usually taking place under harsh pH/electrode potential conditions. Thus, a full atomic-level understanding of the nature of the active sites under realistic electrochemical conditions is needed, having in mind that the state of SACs active centers could be altered by the adsorption of spectating species. In this contribution, Density Functional Theory is employed to conduct thermodynamic analysis of SACs with metal atoms (Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, or Au) embedded into N4 moiety in graphene. Various surface electrochemical processes on such SACs are considered, their Pourbaix plots are constructed, and their activity, selectivity, and stability under operating conditions are discussed. It is demonstrated how adsorption of H, O and OH can cause blockage and restructuring of the active sites and alter the electronic structure. Furthermore, when one deals with metals with lower D-band filling, it is shown that metal center oxidation is preferred over the oxidation of carbon lattice. The effect of the state of the metal center on the reactivity of the carbon lattice is discussed in the case of Fe@N4-graphene. Finally, a possible strategy for confirming the changes in the architecture of the SACs’ active site by analyzing their vibration spectra is suggested. © 2022 Elsevier Ltd},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Liu, Z.; McKay, A. I.; Zhao, L.; Forsyth, C. M.; Jevtović, V.; Petković, M.; Frenking, G.; Vidović, D.
Carbodiphosphorane-Stabilized Parent Dioxophosphorane: A Valuable Synthetic HO2P Source Journal Article
In: Journal of the American Chemical Society, vol. 144, no. 16, pp. 7357-7365, 2022.
@article{Liu20227357,
title = {Carbodiphosphorane-Stabilized Parent Dioxophosphorane: A Valuable Synthetic HO2P Source},
author = {Z. Liu and A. I. McKay and L. Zhao and C. M. Forsyth and V. Jevtović and M. Petković and G. Frenking and D. Vidović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128825682&doi=10.1021%2fjacs.2c00936&partnerID=40&md5=7f1a88df3d35b2fdbb192f500f7641da},
doi = {10.1021/jacs.2c00936},
year = {2022},
date = {2022-01-01},
journal = {Journal of the American Chemical Society},
volume = {144},
number = {16},
pages = {7357-7365},
abstract = {Introducing a small phosphorus-based fragment into other molecular entities via, for example, phosphorylation/phosphonylation is an important process in synthetic chemistry. One of the approaches to achieve this is by trapping and subsequently releasing extremely reactive phosphorus-based molecules such as dioxophosphoranes. In this work, electron-rich hexaphenylcarbodiphosphorane (CDP) was used to stabilize the least thermodynamically favorable isomer of HO2P to yield monomeric CDP·PHO2. The title compound was observed to be a quite versatile phosphonylating agent; that is, it showed a great ability to transfer, for the first time, the HPO2fragment to a number of substrates such as alcohols, amines, carboxylic acids, and water. Several phosphorous-based compounds that were generated using this synthetic approach were also isolated and characterized for the first time. According to the initial computational studies, the addition-elimination pathway was significantly more favorable than the corresponding elimination-addition route for "delivering" the HO2P unit in these reactions. © 2022 American Chemical Society. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jocić, A.; Breitenbach, S.; Pašti, I. A.; Unterweger, C.; Fürst, C.; Lazarević-Pašti, T.
Viscose-derived activated carbons as adsorbents for malathion, dimethoate, and chlorpyrifos—screening, trends, and analysis Journal Article
In: Environmental Science and Pollution Research, vol. 29, no. 23, pp. 35138-35149, 2022.
@article{Jocić202235138,
title = {Viscose-derived activated carbons as adsorbents for malathion, dimethoate, and chlorpyrifos—screening, trends, and analysis},
author = {A. Jocić and S. Breitenbach and I. A. Pašti and C. Unterweger and C. Fürst and T. Lazarević-Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123254291&doi=10.1007%2fs11356-022-18721-1&partnerID=40&md5=11ccedde5d997a89c9bcc90f0a614def},
doi = {10.1007/s11356-022-18721-1},
year = {2022},
date = {2022-01-01},
journal = {Environmental Science and Pollution Research},
volume = {29},
number = {23},
pages = {35138-35149},
abstract = {The release and accumulation of pesticides in the environment require the development of novel sustainable technologies for their removal. While adsorption is a classical approach, the design of new materials with enhanced adsorption properties could rationalize the remediation routes and decrease potential risks for their non-target organisms, including humans. More importantly, the use of adsorbents and their synthesis should be implemented in a sustainable and environmentally friendly manner. In this contribution, we studied the adsorption of organophosphorus pesticides (OPs) dimethoate, malathion, and chlorpyrifos on viscose fiber–derived activated carbon fibers (ACFs). The most efficient adsorption was found for chlorpyrifos, followed by malathion and dimethoate, while material properties were correlated with OP uptake. These ACFs are extremely efficient for chlorpyrifos adsorption, with experimentally observed adsorption capacitances reaching 240 mg g−1. Detailed analysis suggests that chlorpyrifos is physisorbed on ACF surfaces and that increased surface hydrophilicity reduces the uptake. Studied ACFs have great potential for practical application. They can reduce OPs’ concentrations to such levels that no acute neurotoxic effects of the studied OPs in spiked tap water samples are seen, even for starting concentrations up to 104 times higher than the allowed ones. Finally, this study presents possible guidance for developing even more efficient and environmentally friendly adsorbents for chlorpyrifos, the most toxic among studied OPs. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Petrovic, J.; Savovic, J.; Rankovic, D.; Kuzmanovic, M.
Quantitative Analysis of Coal by Laser-Induced Breakdown Spectroscopy Using TEA CO2 Laser as the Excitation Source Journal Article
In: Plasma Chemistry and Plasma Processing, vol. 42, no. 3, pp. 519-533, 2022.
@article{Petrovic2022519,
title = {Quantitative Analysis of Coal by Laser-Induced Breakdown Spectroscopy Using TEA CO2 Laser as the Excitation Source},
author = {J. Petrovic and J. Savovic and D. Rankovic and M. Kuzmanovic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124537756&doi=10.1007%2fs11090-022-10234-6&partnerID=40&md5=3c1505d7a445fceea1ddca8a6a522181},
doi = {10.1007/s11090-022-10234-6},
year = {2022},
date = {2022-01-01},
journal = {Plasma Chemistry and Plasma Processing},
volume = {42},
number = {3},
pages = {519-533},
abstract = {This work presents a study of the applicability of laser-induced breakdown spectroscopy based on infrared transversally excited atmospheric CO2 pulsed laser for quantitative analysis of main inorganic elements in lignite coals. Calibration standards were prepared by mixing and pelleting an appropriate amount of rock reference material and graphite. Time-integrated spatially resolved measurements of analyte spectra of standard samples were used to construct univariate calibration curves of Al, Si, Ca, Fe and Mg. The spectral intensities of analytical lines were normalized by the carbon spectral line to compensate for the shot-to-shot fluctuation of plasma parameters. The obtained curves of growth have good linearity in a wide range of concentrations (up to 1% for Al and 3% for Si). Correlation coefficients were in the range of 0.955–0.993, depending on the element. Measured limits of detection (from 2.4 to 25 ppm for analyzed metals and 61 ppm for Si) are low enough to control the coal combustion process in power plants. The Stark-broadening and the Boltzmann plot method were used to determine apparent values of excitation temperatures and electron number densities. A relatively small but measurable influence of the concentration of metal elements on the plasma parameters was observed, which should be considered in quantitative analysis of coal samples with higher inorganic elements content. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ležaić, A. Janošević; Pašti, I.; Gledović, A.; Antić-Stanković, J.; Božić, D.; Uskoković-Marković, S.; Ćirić-Marjanović, G.
Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities Journal Article
In: Synthetic Metals, vol. 286, 2022.
@article{JanoševićLežaić2022,
title = {Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities},
author = {A. Janošević Ležaić and I. Pašti and A. Gledović and J. Antić-Stanković and D. Božić and S. Uskoković-Marković and G. Ćirić-Marjanović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125835685&doi=10.1016%2fj.synthmet.2022.117048&partnerID=40&md5=2291639b0a299ff7ce18819fba9c6542},
doi = {10.1016/j.synthmet.2022.117048},
year = {2022},
date = {2022-01-01},
journal = {Synthetic Metals},
volume = {286},
abstract = {Novel electroactive PANI-GA micro/nanostructured functional copolymers/co-oligomers were synthesized by the oxidative copolymerization of aniline and gallic acid (GA) in an aqueous solution, using ammonium peroxydisulfate (APS) as an oxidant and different initial mole ratios of GA to aniline ([GA]/[aniline]=0.1, 0.25, 0.5 and 1.0). It was found that the yield, molecular structure, morphology, electrical conductivity, electrochemical behavior, antioxidant and antimicrobial properties of PANI-GA strongly depend on [GA]/[aniline] ratio. The highest conductivity (3.8 × 10–3 S cm−1) showed PANI-GA with dominant polyaniline (PANI) emeraldine salt segments and nanorod morphology, synthesized at [GA]/[aniline] = 0.1. FTIR spectroscopy confirmed the presence of covalently bonded GA and PANI-type structural segments in PANI-GA. The antioxidant activity of PANI-GA was explored by the spectrophotometric 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and electrochemical test for superoxide anion radical, •O2−. All protonated PANI-GA showed good scavenging activity toward ABTS•+ and •O2− radicals, whereby the highest activity exhibited PANI-GA produced at [GA]/[aniline] = 1. The radical scavenging activity of protonated PANI-GA samples toward ABTS•+ was much higher than that of PANI. The antimicrobial properties of the PANI-GA against bacteria S. aureus and E. coli, as well as against fungus C. albicans were evaluated. All synthesized protonated PANI-GA were more effective as S. aureus growth inhibitors than pristine GA and PANI. Highest effectiveness against E. coli and C. albicans, higher than that of pristine GA and PANI, showed conductive PANI-GA synthesized at [GA]/[aniline]= 0.1. Based on the obtained experimental results the mechanism of GA and aniline oxidative copolymerization is proposed. © 2022 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Popadić, D.; Gavrilov, N.; Ignjatović, L.; Krajišnik, D.; Mentus, S.; Milojević-Rakić, M.; Bajuk-Bogdanović, D.
How to Obtain Maximum Environmental Applicability from Natural Silicates Journal Article
In: Catalysts, vol. 12, no. 5, 2022.
@article{Popadić2022,
title = {How to Obtain Maximum Environmental Applicability from Natural Silicates},
author = {D. Popadić and N. Gavrilov and L. Ignjatović and D. Krajišnik and S. Mentus and M. Milojević-Rakić and D. Bajuk-Bogdanović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129371491&doi=10.3390%2fcatal12050519&partnerID=40&md5=931d4fab56896d8013cc0864f61733ea},
doi = {10.3390/catal12050519},
year = {2022},
date = {2022-01-01},
journal = {Catalysts},
volume = {12},
number = {5},
abstract = {Unmodified natural silicates (bentonite, kaolin, clinoptilolite and diatomites) were tested as adsorbents for the organic pollutants in water tables using Methylene Blue (MB) as the model adsorbate. Among the selected materials, bentonite adsorbed as much as 237 mg/g, confirming its excellent suitability for pollutant removal. Spectral evidence confirmed successful MB immobilization at the bentonite surface. Furthermore, the thermal treatment of MB-saturated adsorbent in an inert atmosphere at 700◦C produced a carbon/silicate composite. EDX confirmed the formation of the nitrogen-doped carbon overlay on the silica scaffold and the obtained composite material was probed as an electrode material for oxygen reduction in an alkaline solution. Reduction proceeded via a two-electron mechanism with the main product being HO2−, a known nucleophile, which was subsequently used to degrade/demethylate MB. The composite showed a considerable 70% MB removal rate after an hour of electrochemical treatment. The synergy between the processes of adsorption of MB and the surface-generated HO2− dictates the efficiency of the method and points to a possible route for spent adsorbent reuse in the form of a durable product for environmental protection. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Slavković-Beškoski, L.; Ignjatović, L.; Bolognesi, G.; Maksin, D.; Savić, A.; Vladisavljević, G.; Onjia, A.
In: Metals, vol. 12, no. 5, 2022.
@article{Slavković-Beškoski2022,
title = {Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate},
author = {L. Slavković-Beškoski and L. Ignjatović and G. Bolognesi and D. Maksin and A. Savić and G. Vladisavljević and A. Onjia},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129429603&doi=10.3390%2fmet12050791&partnerID=40&md5=7462526eed048fdff76965ad1b54fc94},
doi = {10.3390/met12050791},
year = {2022},
date = {2022-01-01},
journal = {Metals},
volume = {12},
number = {5},
abstract = {A dispersive solid-phase microextraction (DSPME) sorbent consisting of poly(1,6-hexanedi-ol diacrylate)-based polymer microspheres, with embedded graphene microparticles (poly(HDDA)/g-raphene), was synthesized by microfluidic emulsification/photopolymerization and characterized by optical microscopy and X-ray fluorescence spectrometry. This sorbent was applied for simple, fast, and sensitive vortex-assisted DSPME of rare earth elements (RREs) in coal fly ash (CFA) leachate, prior to their quantification by inductively coupled plasma mass spectrometry (ICP-MS). Among nine DSPME variables, the Plackett–Burman screening design (PBD), followed by the central composite optimization design (CCD) using the Derringer desirability function (D), identified the eluent type as the most influencing DSPME variable. The optimum conditions with maximum D (0.65) for the chelating agent di-(2-ethylhexyl) phosphoric acid (D2EHPA) amount, the sorbent amount, the eluting solvent, the extraction temperature, the centrifuge speed, the vortexing time, the elution time, the centrifugation time, and pH, were set to 60 µL, 30 mg, 2 M HNO3, 25◦ C, 6000 rpm, 1 min, 1 min, 5 min, and 4.2, respectively. Analytical validation of the DSPME method for 16 REEs (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in CFA leachate samples estimated the detection limits at the low ppt level, the recovery range 43–112%, and relative standard deviation within ± 22%. This method was applied to a water extraction procedure (EP) and acetic acid toxicity characteristic leaching procedure (TCLP) for leachate of CFA, from five different coal-fired thermoelectric power plants. The most abundant REEs in leachate (20 ÷ 1 solid-to-liquid ratio) are Ce, Y, and La, which were found in the range of 22–194 ng/L, 35–105 ng/L, 48–95 ng/L, and 9.6–51 µg/L, 7.3–22 µg/L, 2.4–17 µg/L, for EP and TCLP leachate, respectively. The least present REE in TCLP leachate was Lu (42–125 ng/L), which was not detected in EP leachate. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Radinović, K.; Mladenović, D.; Milikić, J.; Alsaiari, M.; Harraz, F. A.; Santos, D. M. F.; Šljukić, B.
Tuning Electrocatalytic Activity of Gold Silver Nanoparticles on Reduced Graphene Oxide for Oxygen Reduction Reaction Journal Article
In: Journal of the Electrochemical Society, vol. 169, no. 5, 2022.
@article{Radinović2022,
title = {Tuning Electrocatalytic Activity of Gold Silver Nanoparticles on Reduced Graphene Oxide for Oxygen Reduction Reaction},
author = {K. Radinović and D. Mladenović and J. Milikić and M. Alsaiari and F. A. Harraz and D. M. F. Santos and B. Šljukić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131117867&doi=10.1149%2f1945-7111%2fac67b7&partnerID=40&md5=c0185941629c8457ab4eada8594b55cb},
doi = {10.1149/1945-7111/ac67b7},
year = {2022},
date = {2022-01-01},
journal = {Journal of the Electrochemical Society},
volume = {169},
number = {5},
abstract = {Gold-silver (AuAg) nanoparticles were deposited on reduced graphene oxide (rGO), with Au wt% varying from 34.6 to 46.2 and Ag wt% ranging from 31.7 to 35.3. Three AuAg/rGO samples were characterized by inductively coupled plasma optical emission spectroscopy, transmission and scanning electron microscopy with energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis. Subsequently, AuAg/rGO materials were studied using the rotating disk electrode as electrocatalysts for oxygen reduction reaction (ORR) for potential application in alkaline fuel cells. AuAg/rGO-3 (with ca. 34.6 wt% Au and 35.3 wt% Ag) showed the most promising performance, with high ORR activity and good stability, as evidenced by the highest current density (−4.45 mA cm−2 at 0.5 V), the lowest Tafel slope (103 mV dec−1), and the highest number of electrons exchanged (4.1). © 2022 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Cvjetan, N.; Kissner, R.; Bajuk-Bogdanović, D.; Ćirić-Marjanović, G.; Walde, P.
In: RSC Advances, vol. 12, no. 21, pp. 13154-13167, 2022.
@article{Cvjetan202213154,
title = {Hemin-catalyzed oxidative oligomerization of p-aminodiphenylamine (PADPA) in the presence of aqueous sodium dodecylbenzenesulfonate (SDBS) micelles},
author = {N. Cvjetan and R. Kissner and D. Bajuk-Bogdanović and G. Ćirić-Marjanović and P. Walde},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130096783&doi=10.1039%2fd2ra02198f&partnerID=40&md5=c08610ec35cdec41b274eb4c251889df},
doi = {10.1039/d2ra02198f},
year = {2022},
date = {2022-01-01},
journal = {RSC Advances},
volume = {12},
number = {21},
pages = {13154-13167},
abstract = {In a previous report on the enzymatic synthesis of the conductive emeraldine salt form of polyaniline (PANI-ES) in aqueous solution using PADPA (p-aminodiphenylamine) as monomer, horseradish peroxidase isoenzyme C (HRPC) was applied as a catalyst at pH = 4.3 with H2O2 as a terminal oxidant. In that work, anionic vesicles were added to the reaction mixture for (i) guiding the reaction to obtain poly(PADPA) products that resemble PANI-ES, and for (ii) preventing product precipitation (known as the “template effect”). In the work now presented, instead of native HRPC, only its prosthetic group ferric heme b (= hemin) was utilized as a catalyst, and micelles formed from SDBS (sodium dodecylbenzenesulfonate) served as templates. For the elaborated optimal reaction conditions, complementary UV/vis/NIR, EPR, and Raman spectroscopy measurements clearly showed that the reaction mixture obtained after completion of the reaction contained PANI-ES-like products as dominating species, very similar to the products formed with HRPC as catalyst. HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonate) was found to have a positive effect on the reaction rate as compared to dihydrogenphosphate. This work is the first on the template-assisted formation of PANI-ES type products under mild, environmentally friendly conditions using hemin as a cost-effective catalyst. © 2022 The Royal Society of Chemistry},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jovanović, A. Z.; Bijelić, L.; Dobrota, A. S.; Skorodumova, N. V.; Mentus, S. V.; Pašti, I. A.
In: Electrochimica Acta, vol. 414, 2022.
@article{Jovanović2022b,
title = {Enhancement of hydrogen evolution reaction kinetics in alkaline media by fast galvanic displacement of nickel with rhodium – From smooth surfaces to electrodeposited nickel foams},
author = {A. Z. Jovanović and L. Bijelić and A. S. Dobrota and N. V. Skorodumova and S. V. Mentus and I. A. Pašti},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126534460&doi=10.1016%2fj.electacta.2022.140214&partnerID=40&md5=18ad57813b9058cad68329bebcb81848},
doi = {10.1016/j.electacta.2022.140214},
year = {2022},
date = {2022-01-01},
journal = {Electrochimica Acta},
volume = {414},
abstract = {Energy-efficient hydrogen production is one of the key factors for advancing hydrogen-based economy. Alkaline water electrolysis is the main route for the production of high-purity hydrogen, but further improvements of hydrogen evolution reaction (HER) catalysts are still needed. Industrial alkaline electrolysis relies on Ni-based catalysts, and here we describe a drastic improvement of HER activity of Ni in alkaline media using several model catalysts for HER, obtained upon nickel surface modification in the aqueous solution of rhodium salts, where a spontaneous deposition of rhodium takes place, based on the chemical displacement reaction 3Ni + 2Rh3+ = 3Ni2+ + 2Rh. In the case of smooth Ni-poly electrodes, HER activity surpasses the activity of Pt-poly after just 30 s of exchange with Rh. SEM analysis showed that Rh is uniformly distributed, and that surface roughness changes are lower than 10%, which is in agreement with the electrochemical measurements. Furthermore, XPS analysis has shown effective incorporation of Rh in the surface, while DFT calculations suggest that hydrogen binding is significantly weakened on the Rh-modified Ni surfaces. Such tuning of the hydrogen binding energy is seen as the main factor governing HER activity improvements. The same galvanic displacement protocols were employed for nickel foam electrodes and electrodeposited Ni on Ti mesh. In both cases, somewhat longer Rh exchange times are needed to obtain superior activities than for the smooth Ni surface, but within 10 min. HER overpotentials corresponding to −10 mA cm−2 for nickel foam and electrodeposited Ni electrodes, after modification with Rh, amounted to only −0.07 and −0.09 V, respectively. Thus, it is suggested that a fast spontaneous displacement of Ni with Rh could effectively boost HER in alkaline media with minor cost penalties with regards to energy saving in the electrolysis process. © 2022},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Milovanović, B.; Novak, J.; Etinski, M.; Domcke, W.; Došlić, N.
On the propensity of formation of cyclobutane dimers in face-to-face and face-to-back uracil stacks in solution Journal Article
In: Physical Chemistry Chemical Physics, vol. 24, no. 24, pp. 14836-14845, 2022.
@article{Milovanović202214836,
title = {On the propensity of formation of cyclobutane dimers in face-to-face and face-to-back uracil stacks in solution},
author = {B. Milovanović and J. Novak and M. Etinski and W. Domcke and N. Došlić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85132210991&doi=10.1039%2fd2cp00495j&partnerID=40&md5=0014105330789b9848309d9a174f56a2},
doi = {10.1039/d2cp00495j},
year = {2022},
date = {2022-01-01},
journal = {Physical Chemistry Chemical Physics},
volume = {24},
number = {24},
pages = {14836-14845},
abstract = {UV irradiation of RNA leads to the formation of intra- and inter-strand crosslinks of cyclobutane type. Despite the importance of this reaction, relatively little is known about how the mutual orientation of the two bases affects the outcome of the reaction. Here we report a comparative nonadiabatic molecular dynamics study of face-to-back (F2B) and face-to-face (F2F) stacked uracil-water clusters. The computations were performed using the second-order algebraic-diagrammatic-construction (ADC(2)) method. We found that F2B stacked uracil-water clusters either relax non-reactively to the ground state by an ethylenic twist around the C = C bond or remain in the lowest nπ* state in which the two bases gradually move away from each other. This finding is consistent with the low propensity for the formation of intra-strand cyclobutane dimers between adjacent RNA bases. On the contrary, in F2F stacked uracil-water clusters, in addition to non-reactive deactivation, we found a pro-reactive deactivation pathway, which may lead to the formation of cyclobutane uracil dimers in the electronic ground state. On a qualitative level, the observed photodynamics of F2F stacked uracil-water clusters explains the greater propensity of RNA to form inter-strand cyclobutane-type crosslinks. © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D.; Taylor, A. F.; Bubanja, I. N.
Coupling between nucleation and chemical reactions and its importance in understanding the oxidation of iodine by hydrogen peroxide Journal Article
In: Physical Chemistry Chemical Physics, vol. 24, no. 22, pp. 14022-14032, 2022.
@article{Stanisavljev202214022,
title = {Coupling between nucleation and chemical reactions and its importance in understanding the oxidation of iodine by hydrogen peroxide},
author = {D. Stanisavljev and A. F. Taylor and I. N. Bubanja},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131641709&doi=10.1039%2fd2cp00962e&partnerID=40&md5=93d61609b0c47b050be82f40eb5da7ff},
doi = {10.1039/d2cp00962e},
year = {2022},
date = {2022-01-01},
journal = {Physical Chemistry Chemical Physics},
volume = {24},
number = {22},
pages = {14022-14032},
abstract = {We have investigated the reaction of iodine with hydrogen peroxide coupled to gas nucleation. A step-like increase in the nucleation rate with increasing amounts of dissolved oxygen can act as a trigger for the formation of highly reactive components and complete oxidation of iodine to iodate despite the large thermodynamic barrier for the whole process. Energetic coupling of nucleation with chemical reactions is based on local redistribution of energy by collapsing unstable nuclei. The developed model correctly describes the evolution of the measured reaction parameters. It offers a conceptual improvement of formal-kinetic models by drawing attention to important contributions of physical effects to the reaction mechanism. © 2022 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Negrojević, L.; Lončar, A.; Maksimović, J.; Anić, S.; Čupić, Ž.; Kolar-Anić, L.; Pejić, N.
Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine Journal Article
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 135, no. 3, pp. 1147-1162, 2022.
@article{Negrojević20221147,
title = {Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine},
author = {L. Negrojević and A. Lončar and J. Maksimović and S. Anić and Ž. Čupić and L. Kolar-Anić and N. Pejić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122412741&doi=10.1007%2fs11144-021-02130-5&partnerID=40&md5=8115c1ccfed4bd65250dea3e3daf020b},
doi = {10.1007/s11144-021-02130-5},
year = {2022},
date = {2022-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {135},
number = {3},
pages = {1147-1162},
abstract = {A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, ∆τ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10−6 − 9.2 × 10−6 mol L−1 and 1.1 × 10−6 − 1.4 × 10−5 mol L−1, with the limit of detections of 6.6 × 10−7 mol L−1 and 6.4 × 10−7 mol L−1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed. © 2021, Akadémiai Kiadó, Budapest, Hungary.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}