化工进展2016，Vol.35Issue(8)：2446-2454,9.DOI:10.16085/j.issn.1000-6613.2016.08.22
光催化剂TiO2改性的研究进展
Research progress on modification of TiO2 photocatalyst
刘文芳 1周汝利 1王燕子1
作者信息
- 1. 北京理工大学化工与环境学院，北京100081
- 折叠
摘要
Abstract
TiO2 has such advantages as excellent photocatalytic performance,high chemical stability, low toxicity and price. However,it only responds to UV light due to its wide forbidden band,and the electrons and holes are prone to recombination,leading to a decrease of catalytic activity and efficiency. This paper introduced the latest research progress on several main modification methods of TiO2. Surface deposition of noble metal,semiconductor composite and dye sensitization can reduce the width of the forbidden band,increase the response wavelength and make full use of the sunlight. Ion doping can make TiO2 crystal surface generate the defects,restrain the recombination of photoproduction electrons and holes,and increase the number of surface active centers. Carbon nanotube and graphene modification can improve light absorption of TiO2to the visible,extend the response range, speed up the electronic transmission,reduce the carrier recombination,and upgrade the catalytic efficiency. As a new doping material graphene has great potentials,and TiO2-based multi-components composite photocatalysts are promising to achieve better catalytic properties than single-component surface modified or doped TiO2. Finally,research progress on hydrophilic/hydrophobic surface modification of TiO2 was reviewed.关键词
催化剂/二氧化钛/活性/表面改性/掺杂Key words
catalyst/titanium oxide/reactivity/surface modification/doping分类
化学化工引用本文复制引用
刘文芳,周汝利,王燕子..光催化剂TiO2改性的研究进展[J].化工进展,2016,35(8):2446-2454,9.
