Photocatalytic Degradation with WO<sub>3</sub>/TiO<sub>2</sub> Composites under UV and Visible Light
Masato EzakiWataru MichidaKatsuki Kusakabe
Abstract
Tungsten trioxide and titania composites (WTs) were prepared by acid precipitation following sol-gel method. The photocatalytic activity of WT was evaluated by the photodegradation of methylene blue (MB) under UV and visible light irradiation. Effects of dispersion state in the WTs with different composition on the photocatalytic activity were investigated. Highly dispersed agglomerates consisting of monoclinic WO 3 and anatase TiO 2 nanoparticles were formed. As a result, the WO 3 /TiO 2 photocatalyst with the atomic fraction, W/(W+Ti), of 0.5 showed the highest photocatalytic activity to the MB degradation under UV and visible light irradiation.
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