有序介孔WO_3/TiO_2的制备及其光催化性能研究

Preparation of Ordered Mesoporous WO_3/TiO_2 and Their Photocatalytic Activity

在三嵌段共聚表面活性剂存在下,通过蒸发诱导自组装法(EISA),制备出有序介孔WO3/TiO2复合材料。该复合材料呈现二维六方p6mm对称的孔道结构,并且具有锐钛矿晶相结构以及比纯TiO2更狭窄的帯隙。WO3/TiO2复合材料的光催化性能通过在氙灯光源(λ>400 nm)辐照下降解水中有机污染物2,4-D来评价,与纯TiO2相比,复合材料的光催化活性得到明显提高。

Abstract Ordered mesoporous WO3/TiO2 composite materials was prepared by an evaporation -induced self- assembly （EI- SA） route in the presence of a triblock copolymer surfactant. The material exhibited 2D hexagonal p6mm symmetry and anatase phase structure as well as narrowed bandgap with respect to pure TiO2. The photocatalytic activity of the WO3/TiO2 composite material was evaluated by the degradation of an aqueous organic pollution 2,4 - D under Xe lamp irradiation （ ~, 〉 400 nm）, and enhanced photo- catalytic activity compared to pure TiO2 was obtained for the composite material.