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Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
Published on: July 25, 2025
Oxidation of multicarbon compounds to CO2 by photocatalysts with energy storage abilities
Yoshinori Kuroiwa1, Susie Park1, Nobuyuki Sakai2
1Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Abstract:
Photocatalysts can be used for removal of harmful or odorous organic compounds, but only under illumination. We previously developed a TiO2/Ni(OH)2 photocatalyst with an oxidative energy storage ability, and used it for oxidation of monocarbon compounds such as methanol and formaldehyde to CO2 by the stored energy. Here, we report that TiO2/Ni(OH)2 charged with oxidative energy can also oxidize multicarbon compounds such as acetaldehyde, acetic acid and acetone to CO2 even in the dark. We also report that MnOx can be used as an oxidative energy storage material if it is not in direct contact with the TiO2 photocatalyst (e.g. TiO2/nanoporous SiO2/MnOx). Photocatalytically charged MnOx can also oxidize methanol, acetaldehyde, acetic acid and acetone to CO2.
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