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<p>Mixed-phase MnO<sub>2</sub> was obtained by the action of a glow discharge at atmospheric pressure on a solution of KMnO<sub>4</sub> acting as an electrolyte cathode. The process is based on the action of reactive species in the solution possessing reducing properties. Composites based on MnO<sub>2</sub>/CuO were obtained by treating the obtained manganese dioxide with underwater plasma. Powder X-ray diffraction, scanning electron microscopy, and molecular nitrogen absorption/desorption were used to characterize the obtained products. It was found that the treatment with underwater plasma leads to the formation of a more developed surface. The obtained materials were tested as a photocatalyst for the decomposition of a model solution of a mixture of dyes (concentration 1.2&#xa0;mg/L of each). The results showed high photocatalytic activity (100% removal of all dyes within 20–30&#xa0;min).</p>

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Plasma chemical synthesis and modification of MnO2 as potential photocatalyst

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Nikolay Sirotkin,
  • Valeria Shibaeva,
  • Anton Kraev,
  • Alexander Agafonov,
  • Anna Khlyustova

摘要

Mixed-phase MnO2 was obtained by the action of a glow discharge at atmospheric pressure on a solution of KMnO4 acting as an electrolyte cathode. The process is based on the action of reactive species in the solution possessing reducing properties. Composites based on MnO2/CuO were obtained by treating the obtained manganese dioxide with underwater plasma. Powder X-ray diffraction, scanning electron microscopy, and molecular nitrogen absorption/desorption were used to characterize the obtained products. It was found that the treatment with underwater plasma leads to the formation of a more developed surface. The obtained materials were tested as a photocatalyst for the decomposition of a model solution of a mixture of dyes (concentration 1.2 mg/L of each). The results showed high photocatalytic activity (100% removal of all dyes within 20–30 min).