Plasmochemical preparation of silver nanoparticles: thermodynamics and kinetics analysis of the process
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 6
Abstract
<p>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.</p><p>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<sup>+</sup> 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<sup>-1</sup>∙dm<sup>3</sup>∙min<sup>-1</sup> 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 λ<sub>max</sub>=400–440 nm.</p>
Authors and Affiliations
Margarita Skiba, Alexander Pivovarov, Anna Makarova, Viktoria Vorobyova
Keywords
Related Articles
- EP ID EP527884
- DOI 10.15587/1729-4061.2018.127103
- Views 57
- Downloads 0
Development of methods for the analysis of functional requirements to an information system for consistency and illogicality
<p>The order of work aimed at analyzing the requirements is considered, taking into account application of the service approach to development of IS, models and methods of development of representations of functional req...
Influence of elastic characteristics of raw cotton on the mechanics of feed rollers in the cleaners from small impurities
<p>The effect of the elastic characteristics of raw cotton on the mechanics of the feed rollers in fine impurity cleaners depends on maturity. In cleaners from small impurities, mechanisms are used with spike rollers hav...
Optimizing performance of lithiumion battery by nanosilicon addition mixed in LI4TI5O12 anode made using mechanochemicalhydrothermal method
<p>Lithium Titanate (Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> or LTO) is one of the best candidates to replace graphite as anode material in the lithium-ion battery (LIB), due to unwanted solid electrolyte interphase (...
Improvement of the installation with an extended barrel of cranked type used for fire extinguishing by gel-forming compositions
<p>Extinguishing fires with gel-forming compositions was found to be a promising direction of increasing the extinguishing efficiency, especially at multi-storey buildings and facilities for different functional purposes...
Development of a selfdiagnostics subsystem of the informationmeasuring system using anfis controllers
<p>A hybrid self-diagnostic system was designed to evaluate correctness of functioning of sensors of the information-measuring system of testing hydraulic transmissions of diesel locomotives of UHP 750 type. The system f...