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

镧掺杂介孔TiO2光催化剂的制备、表征及其光催化性能

作　　者：石中亮[1] 赖虹[1] 姚淑华[1] 王少峰[2] 

机构地区：[1]沈阳化工大学应用化学学院,沈阳110142 [2]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《Chinese Journal of Chemical Physics》2012年第1期96-102,I0004,共8页化学物理学报（英文）

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 dif ferential thermal analysis, N2 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 m2/g. X-ray photoelectron spectroscopy measurements in- dicated 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 mesoporous TiO2 under UV and visible light irradiation.

关 键 词：Mesoporous titanium dioxide Lanthanum-doping Photocatalytic activity Phenol 

分 类 号：O[理学]