纳米钨酸盐异质结光催化剂的合成、性能和机理研究

项目名称： 纳米钨酸盐异质结光催化剂的合成、性能和机理研究

项目编号： No.21273034

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 宋旭春

作者单位： 福建师范大学

项目金额： 80万元

中文摘要： 本项目拟以MWO4（M=Fe, Co, Ni, Mn, Zn, Cd, Cu）类型钨酸盐同属黑钨矿结构，晶体结构相似，具有易于形成异质结的特点为基础，制备出高量子转换效率和宽光谱响应的纳米钨酸盐异质结光催化剂。通过控制合成条件，制备出具有不同构型（混合型、核壳型、同轴型、表面分散型）和结构的一系列纳米钨酸盐异质结材料。研究纳米钨酸盐异质结界面微结构、能带结构、异质结构型等与光催化性能的相互关系，阐明纳米异质结构对光生电子-空穴的分离效率、界面电荷转移的调控作用机制。通过上述研究，认识控制光催化过程的关键因素，指导设计新型高效宽光谱响应的光催化剂。

中文关键词： 异质结；光催化；可见光；；

英文摘要： The main objective of this project is to prepare high quantum efficiency and wide-band spectral responsed nano-heterojunction tungstate photocatalysts based on MWO4(M=Fe, Co, Ni, Mn, Zn, Cd, Cu), all of which belong to Wolframite, have the similar crystal structures and tend to form heterojunctions. Series of different configuration(such as mixed type, core-shell type and surface-dispersion type) and structured nano-heterojunction tungstate materials are going to be synthesized through controlling the experimental conditions. The effect of interface nanostructures, energy band structure and heterojunction type of the nano-heterojunction tungstate materials on the photocatalytic activities will be investigated. The controlling mechanism of nano-heterojunctions on the photo-induced electron/hole separation efficiency and the interface charge transfer will be clarified. The research in this project may be in favor of understanding the key factors controlling the photocatalytic process, which may subsequently direct to design the high efficiency and wide-band spectral responsed photocatalysts.

英文关键词： heterojunction；photocatalytic；visible light；；