Microwave-assisted hydrothermal synthesis of α-Mn2O3

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Abstract

For the first time, α-Mn2O3 of cubic crystal structure was synthesized by microwave-assisted hydrothermal treatment of a reaction mixture containing potassium permanganate and ascorbic acid taken in a molar ratio of 1 : (1–1.5), followed by annealing in air. A possible mechanism for the formation of manganese(III) oxide is proposed. The main physicochemical characteristics of the synthesized α-Mn2O3 are determined using X-ray phase analysis, scanning electron microscopy, and low-temperature nitrogen adsorption. It has been established that by varying the molar ratio of the components of the reaction mass, as well as the annealing conditions of the intermediate products, β-MnO2, Mn3O4 and MnO/C, Mn3O4/C composites can be additionally obtained.

About the authors

G. S. Zakharova

Institute of Solid State Chemistry, Ural Division, Russian Academy of Sciences

Email: volkov@ihim.uran.ru
Ekaterinburg, 620077 Russia

Z. A. Fattakhova

Institute of Solid State Chemistry, Ural Division, Russian Academy of Sciences

Author for correspondence.
Email: volkov@ihim.uran.ru
Ekaterinburg, 620077 Russia

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