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RAS Chemistry & Material ScienceЖурнал неорганической химии Russian Journal of Inorganic Chemistry

  • ISSN (Print) 0044-457X
  • ISSN (Online) 3034-560X

Magnetic Photocatalysts Based on Nanocrystalline Manganese-Doped Titanium Dioxide

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PII
10.31857/S0044457X22100518-1
DOI
10.31857/S0044457X22100518
Publication type
Status
Published
Authors
Veniamin V. Zheleznov
  • Affiliation: Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences
Volume/ Edition
Volume 68 / Issue number 1
Pages
105-114
Abstract
Manganese-doped anatase with a nanosized morphology (as spherically shaped nanoparticles) has been synthesized under hydrothermal conditions. It has been shown that manganese is incorporated into the titanium dioxide structure to form substitutional solid solutions. At high dopant concentrations, part of the introduced manganese goes to the formation of α-MnO2. A significant increase in the optical activity in the visible range and a decrease in the bandgap width down to ~2.4 eV are observed for manganese-doped anatase because of the appearance of extrinsic (multivalent Mn ions) and intrinsic compensating (oxygen vacancies) defects. It has been found that manganese-doped samples are diluted magnetic semiconductors, and the magnetic characteristics increase with increasing manganese content. All manganese-containing samples demonstrate photocatalytic activity in the degradation reaction of indigo carmine when irradiated with visible light. The degree of dye degradation depends on the content of manganese in the samples and reaches >90%.
Keywords
анатаз легирование наночастицы запрещенная зона магнитные свойства фотокаталитическая активность
Date of publication
17.09.2025
Year of publication
2025
Number of purchasers
0
Views
14

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