Selenium-Modified TiO2 and Its Impact on Photocatalysis

被引：54

作者：

Rockafellow, Erin M. ^{[1
]}

Haywood, Jessica M. ^{[1
]}

Witte, Travis ^{[1
]}

Houk, Robert S. ^{[1
]}

Jenks, William S. ^{[1
]}

机构：

[1] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

来源：

LANGMUIR | 2010年 / 26卷 / 24期

基金：

美国国家科学基金会;

关键词：

VISIBLE-LIGHT ABSORPTION; TITANIUM-DIOXIDE; DOPED TIO2; ORGANIC-MOLECULES; ELECTRON-TRANSFER; THIN-FILMS; BAND-GAP; DEGRADATION; MECHANISMS; REDUCTION;

D O I：

10.1021/la1026569

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work describes the preparation of a selenium-modified TiO2 photocatalyst and a preliminary evaluation of its photocatalytic activity. Se-TiO2 displayed greater visible absorption than undoped TiO2 and was still capable of degrading quinoline at a slightly faster rate than undoped TiO2 under UV light. Se-TiO2 was also able to degrade organic molecules under purely visible light by a single electron transfer pathway. Irradiation with >435 nm light showed no evidence of efficient production of HO center dot-like species. Se-TiO2 was also examined under hypoxic conditions, where the Se atoms were capable of trapping photogenerated electrons as evidenced by XPS.

引用

页码：19052 / 19059

页数：8

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