文献类型：期刊文献

英文题名：Synthesis of well ordered mesoporous Yb, N co-doped TiO₂ with superior visible photocatalytic activity

作者：Ma, Yunfei;Xing, Mingyang;Zhang, Jinlong[1];Tian, Baozhu;Chen, Feng

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：156

起止页码：145

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000303625200020)】；

基金：This work has been supported by National Nature Science Foundation of China (20977030, 21173077); National Basic Research Program of China (973 Program, 2010CB732306), the Project of International Cooperation of the Ministry of Science and Technology of China (2011DFA50530); Science and Technology Commission of Shanghai Municipality (10520709900, 10JC1403900) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Mesoporous titanium dioxide; Visible light activity; Ytterbium; Nitrogen; Co-doped

摘要：Well-ordered mesoporous TiO2 co-doped with nitrogen and ytterbium was successfully synthesized by an evaporation-induced self-assembly process. The as-prepared and calcined mesoporous TiO2 materials were characterized by X-ray diffraction, transmission electron microscope, UV-vis absorbance spectroscopy, X-ray photoelectron spectroscopy, fourier transform infrared and N-2 adsorption-desorption measurements. After calcinations at 350 degrees C. the TiO2 co-doped with nitrogen and 3% ytterbium had the highest surface area (219 m(2) g(-1)) and retained ordered structures. Under visible light irradiation, 75% of 20 mg/L phenol solution was degraded after 10 h and 10 mg/L rhodamine B (RhB) was decomposed completely after 4 h. The significant enhancement in the photocatalytic activity of the modified TiO2 is attributed to the synergistic effect of N and Yb. The N dopant extended the absorption to visible region and the Yb dopant was beneficial in stabilizing the mesoporous structure and restraining the recombination of photogenerated holes and electrons. (C) 2012 Elsevier Inc. All rights reserved.