Preparation, Characterization and Photocatalytic Activity of Lanthanum Doped Mesoporous Titanium Dioxide

被引：25
作者：
Shi, Zhong-liang [1 ]
Lai, Hong [1 ]
Yao, Shu-hua [1 ]
Wang, Shao-feng [2 ]
机构：
[1] Shenyang Univ Chem Technol, Sch Appl Chem, Shenyang 110142, Peoples R China
[2] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2012年 / 25卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Mesoporous titanium dioxide; Lanthanum-doping; Photocatalytic activity; Phenol; TIO2; THIN-FILMS; SURFACE-AREA; OXIDES; PHOTODEGRADATION; DEGRADATION; OXIDATION; MICROSTRUCTURES; HYDROPHILICITY; NANOPARTICLES; SUSPENSION;
D O I：
10.1088/1674-0068/25/01/96-102
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Lanthanum doped mesoporous titanium dioxide photocatalysts with different La content were synthesized by template method using tetrabutyltitanate (Ti(OC4H9)(4)) as precursor and Pluronic P123 as template. The catalysts were characterized by thermogravimetric differential thermal analysis. N-2 adsorption-desorption measurements, X-ray diffraction, and UV-Vis adsorption spectroscopy. The effect of La3+ doping concentration from 0.1% to 1% on the photocatalytic activity of mesoporous TiO2 was investigated. The characterizations indicated that the photocatalysts possessed a homogeneous pore diameter of about 10 nm with high surface area of 165 m(2)/g. X-ray photoelectron spectroscopy measurements indicated the presence of C in the doped samples in addition to La. Compared with pure mesoporous TiO2, the La-doped samples extended the photoabsorption edge into the visible light region. The results of phenol photodecomposition showed that La-doped mesoporous TiO2 exhibited higher photocatalytic activities than pure rnesoporous TiO2 under UV and visible light irradiation.
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页码：96 / 102
页数：7
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