TiO2-CNTs-BiVO4三元复合及光催化机理研究

项目名称： TiO2-CNTs-BiVO4三元复合及光催化机理研究

项目编号： No.21271022

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： 李文军

作者单位： 北京科技大学

项目金额： 80万元

中文摘要： 随着工业化进程与环境污染矛盾的日益突出，宽谱吸收的高效催化剂日益受到重视。本项目选择窄禁带半导体与二氧化钛及表面化学修饰的碳纳米管制备复合材料。围绕可见光光催化剂构建、反应机理及应用基础等关键科学问题，利用能带理论和分子轨道理论，从调控带隙宽度和红移匹配入手，探索吸收波长更长、频谱更宽(400～800nm)的新型复合可见光催化材料；研究催化材料表面、界面微结构及量子尺寸效应对太阳能转化效率的影响；利用扫描电化学显微镜研究电子转移动力学，探索窄禁带半导体/二氧化钛/碳纳米管异质结电子传递的可能机理。动态模拟污染物降解的催化反应过程，进一步揭示反应机理、完善制备工艺、提高催化效率，为实现高效可见光催化剂的实用化打下理论基础。

中文关键词： 可见光催化；掺杂；异质结；；

英文摘要： Along with the contradiction between the process of industrialization and environmental pollution is increasing outstandly, the wide spectral absorption and high efficiency catalyst has been paid more and more attention. In this project, narrow gap semiconductor will be chosen and composited with titanium dioxide and surface chemical modification of carbon nanotubes. Around the visible light catalyst reaction mechanism, structure and application, using the energy band theory and molecular orbital theory, tuning the band gap width and matching of redshift, the longer absorption wavelength, wider spectrum ( 400- 800nm ) composite visible light catalysts will be explored. The material surface, interface structure and quantum size effect on solar energy conversion efficiency will be researched in detail. Using scanning electrochemical microscopy, the narrow band gap semiconductor - titanium dioxide-carbon nanotube heterojunctions electron transfer mechanism will be studied. The pollutant degradation catalytic reaction process will be simulated, and the reaction mechanism, perfect preparation process, improved the catalytic efficiency will be investigated, which will be theoretical foundation for the practical application of high-efficient visible light catalyst.

英文关键词： Visible light photocatalysis；Doping；Heterojunction；；