文献类型：期刊文献

英文题名：The study of visible light active bismuth modified nitrogen doped titanium dioxide photocatlysts: Role of bismuth

作者：Bagwasi, Segomotso;Niu, Yuxiao;Nasir, Muhammad;Tian, Baozhu;Zhang, Jinlong[1]

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：2013

卷号：264

起止页码：139

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20125015779702);WOS:【SCI-EXPANDED(收录号:WOS:000312004800023)】；

基金：This work has been supported by the National Nature Science Foundation of China (20977030, 21173077, and 21047002); the National Basic Research Program of China (973 Program, 2010CB732306), The Project of International Cooperation of the Ministry of Science and Technology of China (No. 2011DFA50530); Science and Technology Commission of Shanghai Municipality (10JC1403900, 12XD1402200) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Bismuth modification; Photocatalyst; Visible light, Degradation; 2,4-Dichlorophenol

摘要：Bismuth modified nitrogen doped TiO2 nanoparticles have been successfully prepared by two steps synthesis route which includes hydrothermal and impregnation hydrolysis method. Samples were characterized using X-ray diffraction (XRD), N-2 physical adsorption, Transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Fourier Transmission Infrared (FTIR), Raman, X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PLS) technologies. The preparatory method afforded the production of well crystallized spherical Bi modified N-doped TiO2 nanoparticles with varied amounts of Bi content. XRD analysis results reveal that Bi exists as rare metastable Bi20TiO32 which started to surface at Bi loading content of 7 mol% in relation to Ti ions. All Bi modified N-TiO2 samples exhibited higher photocatalytic activity toward degradation of 2,4-DCP over N-TiO2 under visible light irradiation. The sample with 10% composition of the Bi20TiO32 exhibited the highest activity. The superior photocatalytic performance of 10% Bi/N-TiO2 is attributed to high visible light absorption as well as effective charge carrier separation. Therefore, the role of Bi species in the N-TiO2 is improvement of visible light harvesting and facilitation of charge carrier separation hence alleviating electron-hole recombination. (C) 2012 Elsevier B.V. All rights reserved.