Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO4 Catalyst

doi:10.7517/j.issn.1674-0475.2010.05.368

Abstract

Abstract: Novel AgBr/CaWO₄ composite catalyst was synthesized by loading AgBr on CaWO₄ substrate via ion exchange method.AgBr/CaWO₄ was characterized by XRD,SEM and UV-Vis technology.The effect of loaded amount of AgBr and AgBr/CaWO₄ amount on the degradation efficiency of methyl orange(MO) was studied under visible light irradiation condition(500 W,λ>;420 nm).The results showed that AgBr/CaWO₄ displayed good photocatalytic activity and the degradation process of MO solution obeyed the pseudo-first-order kinetics equation.The photocatalytic activity of AgBr/CaWO₄ for MO increased and tended to a maximal value with increasing the AgBr loaded amount,as well as AgBr/CaWO₄ amount.

Key words: visible light photocatalysis, methyl orange, AgBr/CaWO₄ photocatalyst

CLC Number:

LIN Hai-li, CAO Jing, LUO Bang-de, JU Ting-yong, CHEN Shi-fu. Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO₄ Catalyst[J]. Imaging Science and Photochemistry, 2010, 28(5): 368-375.

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Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO₄ Catalyst

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