BiOX/BiYO4(X=Cl,Br,I;Y=V,Nb)异质结微结构调控光催化性能

项目名称： BiOX/BiYO4(X=Cl,Br,I;Y=V,Nb)异质结微结构调控光催化性能

项目编号： No.21463002

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 赖康荣

作者单位： 昌吉学院

项目金额： 56万元

中文摘要： 光催化对于从根本上解决环境污染和能源短缺等问题具有重要意义。本项目拟采用理论设计与表征结合实验制备与表征的方案，研究开发新型高效的BiOX/BiYO4 (X=Cl,Br,I; Y=V,Nb)异质结复合可见光催化材料。以密度泛函理论、半导体能带理论、化学键成键理论和分子轨道理论等作为理论基础，从微观结构层次进行BiOX/BiYO4 (X=Cl,Br,I; Y=V,Nb)异质结复合光催化材料的设计，然后实验制备。通过研究光生载流子分离和电荷转移过程，探讨半导体异质结界面复合及其协同作用机理，阐明BiOX/BiYO4 (X=Cl,Br,I; Y=V,Nb)异质结复合结构体系与光催化性能之间的内在关系，以期制备高效BiOX/BiYO4 (X=Cl,Br,I; Y=V,Nb)异质结复合光催化材料。本项目的实施，为设计和可控制备具有高效可见光催化活性的铋基半导体/半导体异质结复合材料提供支持和借鉴。

中文关键词： 纳米复合材料；异质结；可见光催化；光催化机理

英文摘要： Photocatalytic technology can fundamentally solve environmental pollution and energy shortages. The project intends to combine theoretical design and characterization with experimental preparation and characterization to study and develope new and highly efficient bismuth-based BiOX/BiYO4(X=Cl,Br,I;Y=V,Nb) heterojunction composite photocatalytic materials. Based on density functional theory, semiconductor band theory, chemical bond theory and molecular orbital theory, we are going to study the design and preparation on the microscopic level. In order to prepare highly efficient BiOX/BiYO4 (X=Cl,Br,I;Y=V,Nb) heterojunction composite photocatalytic materials. Discussion of semiconductor heterojunction interface composite and its synergistic effect mechanism we mainly focus on study the photogenerated carriers separation and transfer process, to explore the interface recombination and their synergistic effect mechanism between semiconductor heterojunction interfaces, and to clarify the intrinsic relationship between the heterojunction composite structure and photocatalytic performance. The present proposal will be helpful to reveal the intrinsic relationship between the interface structure and macroscopic properties of the composite system of bismuth-based BiOX/BiYO4 (X=Cl,Br,I;Y=V,Nb) heterojunction composite structures. Consequently, the way for design and controllable preparing bismuth-based semiconductor/semiconductor heterojunction composites with efficient visible light photocatalytic activity will be found.

英文关键词： Nano composite materimals;Heterojunction;Visible-light photocatalysis;Photocatalytic mechanism