文献类型：期刊文献

英文题名：Synthesis, characterization and application of bismuth and boron Co-doped TiO2: A visible light active photocatalyst

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

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：217

起止页码：108

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20130215880297);WOS:【SCI-EXPANDED(收录号:WOS:000316835600014)】；

基金：This work has been supported by National Nature Science Foundation of China (21237003, 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 (12230705000, 12XD1402200) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Bi-B-TiO2; Visible light; Photocatalyst; Organic pollutants; Photocatalytic degradation

摘要：Bismuth and Boron co-doped TiO2 nanoparticles were successfully prepared by a modified sol-gel method. The products were characterized with various spectroscopic and analytical techniques to determine their structural, morphological, light absorption and photocatalytic properties. The results reveal that all the samples consist of highly crystalline anatase with mesoporous structures. The experimental results further indicate that Bi and B species have been doped into the crystal lattice of TiO2 with Bi substituting Ti in the form of Bi3+ and B doped in the form of substitutional and interstitial B. The presence of Bi species facilitated the incorporation of B into the crystal lattice of TiO2. XRD and TEM analysis show that all the dopants (B and Bi) have the ability to inhibit particle growth of anatase TiO2 with more inhibition exhibited by Bi. Compared to pure TiO2, B and Bi singly doped TiO2; Bi-B co-doped samples showed better activities for degradation of Acid Orange 7 (AO7) and 2, 4-dichlorophenol under visible light irradiation. The highest activity is observed for 3% Bi-B-TiO2 calcined at 450 degrees C. The superior performance of this sample is ascribed to the high surface area, ability to absorb in visible light, efficient charge separation as well as improved e(-) transfer associated with the cooperate effects of appropriate amounts of B and Bi in co-doped sample. Bi species are found to play a pivotal role in the co-doped samples. Superoxide radicals are the most reactive species in degradation of AO7 over 3% Bi-B-TiO2 under visible light irradiation. (c) 2012 Elsevier B.V. All rights reserved.