S. K. Bragina, N. A. Gavrilenko, N. V. Saranchina, M. A. Gavrilenko
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Catalytic Properties of a Nanozyme Based on Silver Nanoparticles Immobilized into a Polymethacrylate Matrix
The catalytic peroxidase-like properties of silver nanoparticles (Ag NPs) immobilized into a polymethacrylate matrix (PMM) were studied. The Ag NPs were prepared by thermal reduction of silver cations preimmobilized in a PMM. The morphology of the nanocomposite was studied using scanning electron microscopy (SEM), and the average size of the synthesized individual spherical nanoparticles was 18 ± 5 nm. It was demonstrated that silver nanoparticles immobilized in a polymethacrylate matrix (PMM–Ag0) exhibited pronounced peroxidase-like activity in the oxidation reaction of a chromogenic substrate, indigo carmine, under the action of H2O2. The Michaelis–Menten model was used to estimate the kinetic parameters of the reaction. The Michaelis constants (Km) of 0.1 and 1.0 mM for indigo carmine and H2O2, respectively, indicated a strong affinity of the substrates to silver nanoparticles in PMM.
期刊介绍：
Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.
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