The structural, physical and photocatalytic properties of the mesoporous Cr-doped TiO2

被引：146

作者：

Fan, Xiaoxing ^{[1
,2
]}

Chen, Xinyi ^{[1
,3
]}

Zhu, Shaopeng ^{[2
]}

Li, Zhaosheng ^{[1
,2
,3
]}

Yu, Tao ^{[1
,3
]}

Ye, Jinhua ^{[4
]}

Zou, Zhigang ^{[1
,3
]}

机构：

[1] Nanjing Univ, Dept Phys, ERERC, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[4] Natl Inst Mat Sci, PCMC, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2008年 / 284卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Cr-doped; mesoporous TiO2; photocatalysis; acetaldehyde; photodecomposition;

D O I：

10.1016/j.molcata.2008.01.005

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 visible-light-active mesoporous Cr-doped TiO2 photocatalyst with worm-like channels was synthesized using an evaporation-induced self-assembly approach and characterized by X-ray powder diffraction, nitrogen adsorption-desorption, X-ray photoelectron spectroscopy, transmission electron microscope, and UV-vis diffuse reflectance, respectively. The effect of Cr3+ doping concentration on the photocatalytic activity of mesoporous TiO2 was investigated from 0.1 to 1 mol%. The characterizations indicated that the photocatalysts possessed a homogeneous pore diameter of about 8 nm with high surface area of 117 m(2)/g and a crystalline anatase pore wall doped by Cr3+. Compared with pure mesoporous TiO2, the Cr-doped TiO2 extended the photoabsorption edge into the visible light region. The results of gaseous acetaldehyde photodecomposition showed that mesoporous Cr-doped TiO2 exhibited higher photocatalytic activities than pure mesoporous TiO2 and nonporous Cr-doped TiO2 under visible light irradiation. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：155 / 160

页数：6

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