期刊
APPLIED SURFACE SCIENCE
卷 264, 期 -, 页码 139-147出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2012.09.145
关键词
Bismuth modification; Photocatalyst; Visible light, Degradation; 2,4-Dichlorophenol
类别
资金
- National Nature Science Foundation of China [20977030, 21173077, 21047002]
- National Basic Research Program of China (973 Program) [2010CB732306]
- Project of International Cooperation of the Ministry of Science and Technology of China [2011DFA50530]
- Science and Technology Commission of Shanghai Municipality [10JC1403900, 12XD1402200]
- Fundamental Research Funds for the Central Universities
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据