纳米TiO_2光催化机理及改性研究进展  

Advances in photocatalytic mechanism and modification of nano-TiO_2

作　　者：张文彬[1] 谢利群[2] 白元峰 

机构地区：[1]攀枝花钢铁研究院,四川攀枝花617000 [2]中国石油吉林石化公司研究院,吉林吉林132021 [3]中国石油工程设计有限公司东北分公司,吉林吉林132021

出　　处：《化工科技》2005年第6期52-57,共6页Science & Technology in Chemical Industry

基　　金：攀枝花钢铁(集团)公司A类重大项目

摘　　要：在纳米TiO2微观结构的基础上,讨论了纳米TiO2光催化改性方法,包括提高可见光响应活性和提高光量子效率,重点阐述了这两种改性和TiO2纳米结构的关系,认为具有更开放晶体结构的锐钛矿型更易于电子迁移,而具有较少表面缺陷的大晶面金红石型更具有电子反应活性,光催化性能的综合改善,应基于特定结构的可以降低(或消除)界面能的不同晶型复配,最后对改性方法提出了建议。The modification methods of TiO2 photocatalysis, including the improvement of visible light response and photons efficiency on the basis of nano-TiO2 microstructure, are discussed. The relation between modification methods and nanostructure is also expounded. There are more space in the crystalline structure of anatase nano-TiO2 than other types, so it is easier for electron to reach surface. By contraries, rutile nano-TiO2 exhibits more activity in electron reaction for its less surface bugs. As a result, the two kinds of nano- crystal may be combined together in order to provide better photocatalysis capability. Finally, some new modification methods are suggested.

关 键 词：二氧化钛 锐钛型 金红石型 光催化 

分 类 号：TQ134.11[化学工程—无机化工]