Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process
The thermodynamics and kinetics analysis of the plasmochemical formation of silver nanoparticles is performed. The thermodynamics analysis is made on the basis of calculation of the Gibbs free energy of formation of silver nanoparticles in an aqueous medium by various methods. It was found that the...
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doaj-29b96678db364e03b1e50a07b41631132020-11-25T01:15:28ZengPC Technology CenterEastern-European Journal of Enterprise Technologies1729-37741729-40612018-03-0126 (92)4910.15587/1729-4061.2018.127103127103Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the processMargarita Skiba0Alexander Pivovarov1Anna Makarova2Viktoria Vorobyova3Ukrainian State University of Chemical Technology Gagarinа ave., 8, Dnipro, Ukraine, 49005Ukrainian State University of Chemical Technology Gagarinа ave., 8, Dnipro, Ukraine, 49005Ukrainian State University of Chemical Technology Gagarinа ave., 8, Dnipro, Ukraine, 49005National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056The thermodynamics and kinetics analysis of the plasmochemical formation of silver nanoparticles is performed. The thermodynamics analysis is made on the basis of calculation of the Gibbs free energy of formation of silver nanoparticles in an aqueous medium by various methods. It was found that the Gibbs free energy in aqueous solutions increases with decreasing size of silver particles. Based on experimental data, it was determined that the average size of plasmochemically prepared particles depends on the initial concentration of silver ions in the solution and equals 36.5–60.1 nm for 0.25–3.0 mmol/l. The kinetics of chemical conversion in aqueous solutions of silver nitrate under plasma treatment conditions in a gas-liquid plasmochemical batch reactor is investigated. The curves of Ag+ dependence on duration of plasmochemical treatment of solutions and initial concentration of silver ions are given. It is found that the process of plasmochemical formation of silver nanoparticles is the second-order reaction. The rate constant of formation of silver nanoparticles is k=0.07–1.53 mol-1∙dm3∙min-1 depending on the initial concentration of silver ions. It is shown that the formation of silver nanodispersions under plasma discharge impact is characterized by the presence of the peak λmax=400–440 nm.http://journals.uran.ua/eejet/article/view/127103low-temperature plasmadischargeformationprocessGibbs free energythermodynamic potentialNernst equationrate constant |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Margarita Skiba Alexander Pivovarov Anna Makarova Viktoria Vorobyova |
spellingShingle |
Margarita Skiba Alexander Pivovarov Anna Makarova Viktoria Vorobyova Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process Eastern-European Journal of Enterprise Technologies low-temperature plasma discharge formation process Gibbs free energy thermodynamic potential Nernst equation rate constant |
author_facet |
Margarita Skiba Alexander Pivovarov Anna Makarova Viktoria Vorobyova |
author_sort |
Margarita Skiba |
title |
Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
title_short |
Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
title_full |
Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
title_fullStr |
Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
title_full_unstemmed |
Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
title_sort |
plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process |
publisher |
PC Technology Center |
series |
Eastern-European Journal of Enterprise Technologies |
issn |
1729-3774 1729-4061 |
publishDate |
2018-03-01 |
description |
The thermodynamics and kinetics analysis of the plasmochemical formation of silver nanoparticles is performed. The thermodynamics analysis is made on the basis of calculation of the Gibbs free energy of formation of silver nanoparticles in an aqueous medium by various methods. It was found that the Gibbs free energy in aqueous solutions increases with decreasing size of silver particles. Based on experimental data, it was determined that the average size of plasmochemically prepared particles depends on the initial concentration of silver ions in the solution and equals 36.5–60.1 nm for 0.25–3.0 mmol/l.
The kinetics of chemical conversion in aqueous solutions of silver nitrate under plasma treatment conditions in a gas-liquid plasmochemical batch reactor is investigated. The curves of Ag+ dependence on duration of plasmochemical treatment of solutions and initial concentration of silver ions are given. It is found that the process of plasmochemical formation of silver nanoparticles is the second-order reaction. The rate constant of formation of silver nanoparticles is k=0.07–1.53 mol-1∙dm3∙min-1 depending on the initial concentration of silver ions. It is shown that the formation of silver nanodispersions under plasma discharge impact is characterized by the presence of the peak λmax=400–440 nm. |
topic |
low-temperature plasma discharge formation process Gibbs free energy thermodynamic potential Nernst equation rate constant |
url |
http://journals.uran.ua/eejet/article/view/127103 |
work_keys_str_mv |
AT margaritaskiba plasmochemicalpreparationofsilvernanoparticlesthermodynamicsandkineticsanalysisoftheprocess AT alexanderpivovarov plasmochemicalpreparationofsilvernanoparticlesthermodynamicsandkineticsanalysisoftheprocess AT annamakarova plasmochemicalpreparationofsilvernanoparticlesthermodynamicsandkineticsanalysisoftheprocess AT viktoriavorobyova plasmochemicalpreparationofsilvernanoparticlesthermodynamicsandkineticsanalysisoftheprocess |
_version_ |
1725153010131140608 |