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Enzyme-Like Activity of Cerium Dioxide Colloidal Solutions Stabilized with L-Malic Acid

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Abstract

For the first time, stable aqueous colloidal solutions of cerium dioxide stabilized with L-malic acid have been obtained at ligand : CeO2 molar ratios of 0.2, 0.5, 1.0, and 2.0. Using dynamic light scattering, it has been shown that CeO2 sols are characterized by a narrow monomodal size distribution of aggregates, and the sols remain to be aggregatively stable in a Tris-HCl buffer solution. According to the chemiluminescence analysis of the enzyme-like activity of cerium dioxide sols with respect to hydrogen peroxide, the surface modification of the cerium dioxide particles with malic acid increases the enzyme-like activity of СеО2 up to 4.5 times.

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ACKNOWLEDGMENTS

This research was performed using the equipment of the JRC PMR IGIC RAS.

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The work was supported by the Russian Science Foundation (project no. 19-13-00416).

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  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. D. Filippova, A. E. Baranchikov & V. K. Ivanov

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Filippova, A.D., Baranchikov, A.E. & Ivanov, V.K. Enzyme-Like Activity of Cerium Dioxide Colloidal Solutions Stabilized with L-Malic Acid. Colloid J 85, 782–794 (2023). https://doi.org/10.1134/S1061933X23600653

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