Efficient Complete Oxidation of Acetaldehyde into CO<sub>2</sub> over CuBi<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub> Composite Photocatalyst under Visible and UV Light Irradiation
Takeo Arai(National Institute of Advanced Industrial Science and Technology), Masatoshi Yanagida(National Institute of Advanced Industrial Science and Technology), Yoshinari Konishi(Nissan (Japan)), Yasukazu Iwasaki(National Institute of Advanced Industrial Science and Technology), Hideki Sugihara(Nissan (Japan)), Kazuhiro Sayama(National Institute of Advanced Industrial Science and Technology)
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Abstract
A highly efficient and visible light responsive photocatalyst was developed by combining the p-type semiconductor CuBi2O4 and the n-type semiconductor WO3. CuBi2O4/WO3 showed higher reactivity than typical TiO2-based photocatalysts for the complete oxidation of acetaldehyde into CO2 under both UV and visible light. From photoelectrochemical measurements, the reaction mechanism is explained based on the model of the p−n photochemical diode for reductivity/oxdizability improvement.
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