Ћир 
Eng 
FFH scientific papers database
426.
Carević, M V; Abazović, N D; Mitrić, M N; Ćirić-Marjanović, G; Mojović, M D; Ahrenkiel, S P; Čomor, M I
Properties of Zirconia/Polyaniline hybrid nanocomposites and their application as photocatalysts for degradation of model pollutants Journal Article
In: Materials Chemistry and Physics, vol. 205, pp. 130-137, 2018.
@article{Carević2018130,
title = {Properties of Zirconia/Polyaniline hybrid nanocomposites and their application as photocatalysts for degradation of model pollutants},
author = {M V Carević and N D Abazović and M N Mitrić and G Ćirić-Marjanović and M D Mojović and S P Ahrenkiel and M I Čomor},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041460485&doi=10.1016%2fj.matchemphys.2017.11.016&partnerID=40&md5=1b2e005d16bce2153d75a67fdc4aa4ba},
doi = {10.1016/j.matchemphys.2017.11.016},
year = {2018},
date = {2018-01-01},
journal = {Materials Chemistry and Physics},
volume = {205},
pages = {130-137},
abstract = {A serie of novel ZrO2/Polyaniline (PANI) hybrid nanocomposite powders were successfully synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in water, in the presence of ZrO2 nanoparticles. Syntheses were performed at initial ZrO2/aniline mole ratios 50, 100 and 150 to produce ZP-50, ZP-100 and ZP-150. The morphological, structural, and optical properties of the synthesized nanocomposites were studied using Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Raman, UV-Vis and Electron-paramagnetic resonance (EPR) spectroscopies. EPR spectra of ZP-50 and ZP-100 nanocomposites showed the presence of intensive peak at the g-values comparable to that for free electrons (2.0023) indicating the presence of oligo/poly (semiquinone radical cations), i.e. polarons as charge carriers in PANI part; ZP-150 showed weak polaron peak of PANI, and peak that can be assigned to defects in zirconia matrix (Zr3+, oxygen vacancies). The monoclinic crystal structure of ZrO2 nanoparticles in all nanocomposites was confirmed by XRD and by Raman spectroscopy. The photocatalytic activities of ZP nanocomposites were evaluated using the photocatalytic degradation of trichlorophenol (TCP) and Rhodamine B model compounds and compared with the activity of bare ZrO2 nanoparticles. Enhanced degradation efficiencies of nanocomposites regarding TCP degradation were observed. © 2017 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A serie of novel ZrO2/Polyaniline (PANI) hybrid nanocomposite powders were successfully synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in water, in the presence of ZrO2 nanoparticles. Syntheses were performed at initial ZrO2/aniline mole ratios 50, 100 and 150 to produce ZP-50, ZP-100 and ZP-150. The morphological, structural, and optical properties of the synthesized nanocomposites were studied using Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Raman, UV-Vis and Electron-paramagnetic resonance (EPR) spectroscopies. EPR spectra of ZP-50 and ZP-100 nanocomposites showed the presence of intensive peak at the g-values comparable to that for free electrons (2.0023) indicating the presence of oligo/poly (semiquinone radical cations), i.e. polarons as charge carriers in PANI part; ZP-150 showed weak polaron peak of PANI, and peak that can be assigned to defects in zirconia matrix (Zr3+, oxygen vacancies). The monoclinic crystal structure of ZrO2 nanoparticles in all nanocomposites was confirmed by XRD and by Raman spectroscopy. The photocatalytic activities of ZP nanocomposites were evaluated using the photocatalytic degradation of trichlorophenol (TCP) and Rhodamine B model compounds and compared with the activity of bare ZrO2 nanoparticles. Enhanced degradation efficiencies of nanocomposites regarding TCP degradation were observed. © 2017 Elsevier B.V.
427.
Bubanja, I N; T., Jr. Bánsági; Taylor, A F
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 123, no. 1, pp. 187, 2018.
@article{Bubanja2018187,
title = {Correction to: Kinetics of the urea–urease clock reaction with urease immobilized in hydrogel beads (Reaction Kinetics, Mechanisms and Catalysis, (2018), 123, 1, (177-185), 10.1007/s11144-017-1296-6)},
author = {I N Bubanja and Jr. Bánsági T. and A F Taylor},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85033465046&doi=10.1007%2fs11144-017-1302-z&partnerID=40&md5=0fd3a20e58670156045d905dc7b4b698},
doi = {10.1007/s11144-017-1302-z},
year = {2018},
date = {2018-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {123},
number = {1},
pages = {187},
abstract = {The original article was published with incomplete acknowledgement section. The complete acknowledgement section is given below.Acknowledgements INB thanks COST action CM1304 Emergence and Evolution in Complex Chemical Systems for funding a Short Term Scientific Mission to the University of Sheffield and AFT and TB thank EPSRC EP/K030574/2 for financial support. INB is also thankful to the Ministry of Education, Science and Technological Development of Republic of Serbia (Project No. 172015-OI) for partial financial support. © 2017, Akadémiai Kiadó, Budapest, Hungary.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The original article was published with incomplete acknowledgement section. The complete acknowledgement section is given below.Acknowledgements INB thanks COST action CM1304 Emergence and Evolution in Complex Chemical Systems for funding a Short Term Scientific Mission to the University of Sheffield and AFT and TB thank EPSRC EP/K030574/2 for financial support. INB is also thankful to the Ministry of Education, Science and Technological Development of Republic of Serbia (Project No. 172015-OI) for partial financial support. © 2017, Akadémiai Kiadó, Budapest, Hungary.
428.
Bubanja, I N; T., Jr. Bánsági; Taylor, A F
Kinetics of the urea–urease clock reaction with urease immobilized in hydrogel beads Journal Article
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 123, no. 1, pp. 177-185, 2018.
@article{Bubanja2018177,
title = {Kinetics of the urea–urease clock reaction with urease immobilized in hydrogel beads},
author = {I N Bubanja and Jr. Bánsági T. and A F Taylor},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032660984&doi=10.1007%2fs11144-017-1296-6&partnerID=40&md5=36936f3426b32093c888ad4334e9774d},
doi = {10.1007/s11144-017-1296-6},
year = {2018},
date = {2018-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {123},
number = {1},
pages = {177-185},
abstract = {Feedback driven by enzyme catalyzed reactions occurs widely in biology and has been well characterized in single celled organisms such as yeast. There are still few examples of robust enzyme oscillators in vitro that might be used to study nonlinear dynamical behavior. One of the simplest is the urea–urease reaction that displays autocatalysis driven by the increase in pH accompanying the production of ammonia. A clock reaction was obtained from low to high pH in batch reactor and bistability and oscillations were reported in a continuous flow rector. However, the oscillations were found to be irreproducible and one contributing factor may be the lack of stability of the enzyme in solution at room temperature. Here, we investigated the effect of immobilizing urease in thiol-poly(ethylene glycol) acrylate (PEGDA) hydrogel beads, prepared using emulsion polymerization, on the urea–urease reaction. The resultant mm-sized beads were found to reproduce the pH clock and, under the conditions employed here, the stability of the enzyme was increased from hours to days. © 2017, The Author(s).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Feedback driven by enzyme catalyzed reactions occurs widely in biology and has been well characterized in single celled organisms such as yeast. There are still few examples of robust enzyme oscillators in vitro that might be used to study nonlinear dynamical behavior. One of the simplest is the urea–urease reaction that displays autocatalysis driven by the increase in pH accompanying the production of ammonia. A clock reaction was obtained from low to high pH in batch reactor and bistability and oscillations were reported in a continuous flow rector. However, the oscillations were found to be irreproducible and one contributing factor may be the lack of stability of the enzyme in solution at room temperature. Here, we investigated the effect of immobilizing urease in thiol-poly(ethylene glycol) acrylate (PEGDA) hydrogel beads, prepared using emulsion polymerization, on the urea–urease reaction. The resultant mm-sized beads were found to reproduce the pH clock and, under the conditions employed here, the stability of the enzyme was increased from hours to days. © 2017, The Author(s).
429.
Cervellati, R; Greco, E; Blagojević, S M; Blagojević, S N; Anić, S; Čupić, Ž D
Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the Orbàn–Epstein Reaction Journal Article
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 123, no. 1, pp. 125-139, 2018.
@article{Cervellati2018125,
title = {Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the Orbàn–Epstein Reaction},
author = {R Cervellati and E Greco and S M Blagojević and S N Blagojević and S Anić and Ž D Čupić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034061184&doi=10.1007%2fs11144-017-1306-8&partnerID=40&md5=dcca861b7b1ed76a72eece09479791c3},
doi = {10.1007/s11144-017-1306-8},
year = {2018},
date = {2018-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {123},
number = {1},
pages = {125-139},
abstract = {The system KSCN–H2O2–CuSO4–NaOH, also known as the Orbàn–Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the Orbàn–Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original Orbàn–Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity. © 2017, Akadémiai Kiadó, Budapest, Hungary.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The system KSCN–H2O2–CuSO4–NaOH, also known as the Orbàn–Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the Orbàn–Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original Orbàn–Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity. © 2017, Akadémiai Kiadó, Budapest, Hungary.
430.
Maćešić, S; Čupić, Ž; Ivanović-Šašić, A; Anić, S; Radenković, M; Pejić, N; Kolar-Anić, L
Bifurcation analysis: a tool for determining model parameters of the considered process Journal Article
In: Reaction Kinetics, Mechanisms and Catalysis, vol. 123, no. 1, pp. 31-45, 2018.
@article{Maćešić201831,
title = {Bifurcation analysis: a tool for determining model parameters of the considered process},
author = {S Maćešić and Ž Čupić and A Ivanović-Šašić and S Anić and M Radenković and N Pejić and L Kolar-Anić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85035793444&doi=10.1007%2fs11144-017-1324-6&partnerID=40&md5=fd784ca75dd788b5c54ce2760c96db60},
doi = {10.1007/s11144-017-1324-6},
year = {2018},
date = {2018-01-01},
journal = {Reaction Kinetics, Mechanisms and Catalysis},
volume = {123},
number = {1},
pages = {31-45},
abstract = {In this paper, we intend to show the importance of the bifurcation analysis in understanding of an oscillatory process. Hence, we use the bifurcation diagram of the Bray–Liebhafsky reaction performed in continuous well-stirred tank reactor under controlled temperature variations for the determination of the activation energies as well as rate constants of particular steps appearing in the kinetic model of oscillatory reaction mechanism. This approach has led us to the development of general procedure for treatment of experimentally obtained data and extracting kinetic parameters from them, which was very important considering that some rate constants of the already proposed model could not be determined experimentally and have to be fitted (or guessed). Also, the proposed approach has the potential to inspire the refinement of already proposed models and the development of a new one that will be able to reproduce experimentally obtained system’s dynamical features more successfully. In particular, the dynamic states of the Bray–Liebhafsky oscillatory reaction have been analyzed experimentally and numerically using already proposed model together with qualitative and quantitative analysis of bifurcation diagrams in both cases. © 2017, Akadémiai Kiadó, Budapest, Hungary.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, we intend to show the importance of the bifurcation analysis in understanding of an oscillatory process. Hence, we use the bifurcation diagram of the Bray–Liebhafsky reaction performed in continuous well-stirred tank reactor under controlled temperature variations for the determination of the activation energies as well as rate constants of particular steps appearing in the kinetic model of oscillatory reaction mechanism. This approach has led us to the development of general procedure for treatment of experimentally obtained data and extracting kinetic parameters from them, which was very important considering that some rate constants of the already proposed model could not be determined experimentally and have to be fitted (or guessed). Also, the proposed approach has the potential to inspire the refinement of already proposed models and the development of a new one that will be able to reproduce experimentally obtained system’s dynamical features more successfully. In particular, the dynamic states of the Bray–Liebhafsky oscillatory reaction have been analyzed experimentally and numerically using already proposed model together with qualitative and quantitative analysis of bifurcation diagrams in both cases. © 2017, Akadémiai Kiadó, Budapest, Hungary.
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