Chemical Modification of Surfaces and the Kinetics of Oxidation of Aqueous Salts of Silver Nanoparticles

Hydrosols of silver nanoparticles chemically modified with cysteine and cysteamine are obtained. Their oxidation with solutions containing active oxygen and chlorine forms is studied. It is shown that the grafted layer of the modifier does not affect the oxidation of the metal core with sodium hypoc...

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Published inRussian Journal of Physical Chemistry A Vol. 95; no. 1; pp. 177 - 182
Main Authors Olenin, A. Yu, Korotkov, A. S., Yagov, V. V., Lisichkin, G. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2021
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Chlorine
Cysteamine
Hydrogen peroxide
Nanoparticles
Oxidation
Physical Chemistry
Physical Chemistry of Nanoclusters and Nanomaterials
Reaction kinetics
Silver
Sodium hypochlorite
chemical surface modification
silver nanoparticles
oxidation kinetics
cysteine
hydrogen peroxide
cysteamine
sodium hypochlorite
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Summary:Hydrosols of silver nanoparticles chemically modified with cysteine and cysteamine are obtained. Their oxidation with solutions containing active oxygen and chlorine forms is studied. It is shown that the grafted layer of the modifier does not affect the oxidation of the metal core with sodium hypochlorite, but it does have a protective effect in the reaction with hydrogen peroxide. The orders of the reaction for the initial and chemically modified nanoparticles are 1 for sodium hypochlorite, and 0 for hydrogen peroxide. Chemically modified nanoparticles tend to form aggregates.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024421010210