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Abstract <p>Cubic α-Mn<sub>2</sub>O<sub>3</sub> 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 was proposed. The main physicochemical characteristics of the synthesized α-Mn<sub>2</sub>O<sub>3</sub> were determined using powder X-ray diffraction, scanning electron microscopy, and low-temperature nitrogen adsorption. It was found that β-MnO<sub>2</sub>, Mn<sub>3</sub>O<sub>4</sub>, and MnO/C and Mn<sub>3</sub>O<sub>4</sub>/C composites can be additionally obtained by varying the molar ratio of the components of the reaction mixture and the conditions of annealing of the precursors.</p>

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Microwave-Assisted Hydrothermal Synthesis of α-Mn2O3

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • G. S. Zakharova,
  • Z. A. Fattakhova

摘要

Abstract

Cubic α-Mn2O3 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 was proposed. The main physicochemical characteristics of the synthesized α-Mn2O3 were determined using powder X-ray diffraction, scanning electron microscopy, and low-temperature nitrogen adsorption. It was found that β-MnO2, Mn3O4, and MnO/C and Mn3O4/C composites can be additionally obtained by varying the molar ratio of the components of the reaction mixture and the conditions of annealing of the precursors.