(Mo plus N) codoped TiO2 for enhanced visible-light photoactivity

被引：51

作者：

Liu, Hailin ^{[2
,3
]}

Lu, Zhihong ^{[1
]}

Yue, Ling ^{[2
,3
]}

Liu, Jing ^{[1
]}

Gan, Zhanghua ^{[1
]}

Shu, Chang ^{[2
,3
]}

Zhang, Ting ^{[2
,3
]}

Shi, Jing ^{[2
,3
,4
]}

Xiong, Rui ^{[2
,3
,4
]}

机构：

[1] Wuhan Univ Sci & Technol, Sch Met & Mat, Wuhan 430081, Peoples R China

[2] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nano Struct, Wuhan 430072, Peoples R China

[3] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China

[4] Hubei Key Lab Organ & Polymer Opto Elect Mat, Wuhan 430072, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 22期

关键词：

(Mo plus N) codoped TiO2; Photoactivity; Sol-gel method; First-principles band structure calculations; V-DOPED TIO2; PHOTOCATALYTIC ACTIVITIES;

D O I：

10.1016/j.apsusc.2011.05.085

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of Ti1-xMoxO2-yNy samples were prepared by using sol-gel method and characterized by X-ray diffraction, transmission electron microscopy and UV-vis absorption spectroscopy. All Ti1-xMoxO2-yNy samples are anatase phase. It is found that Mo, N mono-doping can increase visible light absorption, while (Mo + N) co-doping can greatly enhance absorption in whole visible region. Results of our first-principles band structure calculations reveal that (Mo + N)-doping, especially passivated co-doping can increase the up-limit of dopant concentration and create more impurity bands in the band gap of TiO2, which leads to a greatly increase of its visible-light absorption without a decrease of its redox potential. It reveals that (Mo + N) co-doped TiO2 is promising for a photocatalyst with high photocalystic activity under visible light. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：9355 / 9361

页数：7

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