Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
Solar energy has several advantages, and photocatalytic research in the presence of light has attracted significant interest. However, depending on the situation, sunlight is limited (e.g, climate or night). These limitations can be solved in part via using photocatalysts with special characteristics in the dark. Photo-charged TiO2/WO3 catalysts, which are likely water treatment, have been demonstrated via oxidation reactions in the dark. In this work, photo-charged TiO2/WO3(TW) and TiO2/Al2O2/WO3(TAW) membrane filters for Cr(VI) reduction and As(III) oxidation are evaluated in the dark. The presence or absence of alumina affects oxidation and reduction reactions differently. When photo-charged TW is replaced with TAW, the kinetics of Cr(VI) reduction via direct electron transfer is increased. The kinetics of the As(III) oxidation reaction, on the other hand, are decreased because it is reacted by mediated electron transfer with O2•−. The interaction between water contaminants and TW or TAW catalysts is demonstrated in this study.
This research was supported by the National Research Foundation of Korea (2021K1A4A7A02102598).
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