The structural, physical and photocatalytic properties of the mesoporous Cr-doped TiO2
- 作者：Xiaoxing Fan ; Xinyi Chen ; Shaopeng Zhu ; Zhaosheng Li ; Tao Yu ; Jinhua Ye ; Zhigang Zou
- 关键词：Cr-doped ; Mesoporous TiO2 ; Photocatalysis ; Acetaldehyde ; Photodecomposition
- 刊名：Journal of Molecular Catalysis A ; Chemical
- 出版年：2008
- 期刊代码：57_13811169
- 类别：ch
- 出版时间：2 April 2008
- 卷：284
- 期：1-2
- 页码：155-160
- 文件大小：656 K
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 m2/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.