文献类型：期刊文献

英文题名：A new approach to prepare Ti3+ self-doped TiO2 via NaBH4 reduction and hydrochloric acid treatment

作者：Fang, Wenzhang[1];Xing, Mingyang[1];Zhang, Jinlong[1,2]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

年份：2014

卷号：160

期号：1

起止页码：240

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20142417818825);WOS:【SCI-EXPANDED(收录号:WOS:000340687900028)】；

基金：This work has been supported by the National Natural Science Foundation of China (21173077, 21377038, 21203062 and 21237003); the National Basic Research Program of China (973 Program, 2013CB632403), the Project of International Cooperation of the Ministry of Science and Technology of the People's Republic of China (No. 2011DFA50530); Science and Technology Commission of Shanghai Municipality (12230705000, 12XD1402200); the Research Fund for the Doctoral Program of Higher Education (20120074130001) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：TiO2 photocatalyst; Ti3+ doping; HCl washing treatment; NaBH4 reductant; Photocatalytic mechanism

摘要：Ti3+ self-doped TiO2 are successfully prepared via a simple one-step calcination method, by using low-cost NaBH4 as the reductant. The as-prepared samples are characterized by different techniques such as X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), and Fourier transformation infrared spectroscopy (FTIR). EPR spectra confirm the presence of Ti3+ in the bulk of the samples rather than on the surface, which is the reason for the high photocatalytic performance of the catalyst under visible light irradiation. It is worth noting that the visible light absorption is enhanced after HCl washing, and the photocatalytic activity of Ti3+ self-doped TiO2 is proportional to the concentration of the doped Ti3+. Interestingly, the photocatalytic activity of the catalyst under UV light also increases after HCl washing treatment, which is caused by the increase of BET surface area. (C) 2014 Elsevier B.V. All rights reserved.