Effect of reduction/nitriding on structure and photocatalytic activity of tin dioxide

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Authors

Envyar Bikyashev¹

Conference / event: 8th Asian Symposium on Advanced Materials, July 2023 (Novosibirsk, Russian Federation)

Poster summary: The influence of reductive (H2, NH3) and oxidative (O3) actions on the hydrothermal phase of SnO2 has been studied. It has been established that in the H2 atmosphere already at 300 °C, the appearance of metallic tin is observed. In an NH3 atmosphere, the destruction of SnO2 does not occur up to 400°C. Ozonation of phases partially reduced by hydrogen makes it relatively easy to reproduce the characteristic absorption corresponding to Eg ~3.6 eV. After ozonation of phases reduced with ammonia, the fundamental absorption band of SnO2 remains shifted to the "blue part of the spectrum". It is possible that this difference is caused by partial nitriding of SnO2 in an NH3 atmosphere. The photocatalytic activity of the partially reduced/nitrided SnO2 phases is inferior to the hydrothermal form of the oxide.

Keywords: Tin oxide, Hydrothermal synthesis, Optical absorption, Photocatalytic activity

Additional information

Data availability statement: The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license: Copyright © 2023 Bikyashev. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.