文献类型：期刊文献

英文题名：Preparation and first-principles study for electronic structures of BiOI/BiOcl composites with highly improved photocatalytic and adsorption performances

作者：Yang, Chengyu[1];Li, Feng[1];Zhang, Meng[2];Li, Taohai[1];Cao, Wei[3]

机构：[1]Xiangtan Univ, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Coll Chem, Xiangtan 411105, Peoples R China;[2]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[3]Univ Oulu, Res Ctr Mol Mat, POB 3000, FIN-90014 Oulu, Finland

年份：2016

卷号：423

起止页码：1

外文期刊名：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

收录：;EI(收录号：20162602537914);WOS:【SCI-EXPANDED(收录号:WOS:000383827600001)】；

基金：The authors acknowledge with thanks the financial support of Provincial Natural Science Foundation of Hunan, China (2015JJ2138), the National Natural Science Foundation of China (21343008, 11204079), the Open Project Program of State Key Laboratory of Structural Chemistry, China (No. 20150018) and Oulu University Strategic Grant. T. Li acknowledges the Oulu University Short-term Visit Grant during his stay in Finland.

语种：英文

外文关键词：BiOI/BiOCl; Ionic-liquid; Photocatalytic; Visible light; Ultrasonic

摘要：The BiOI/BiOCl composites with high photocatalyitic and adsorption ablities were prepared via a facile ionic liquid assisted ultrasonic method in several hours at room temperature. The BiOI/BiOCl composites with different contents of BiOI can be conveniently synthesized via changing the amount of 1-ethyl-3-methylimidazolium iodide precursor during the preparation process. Microstructures, morphologies, porosities and bandgaps of the as -prepared samples were determined through various experimental methods. A first-principles calculation was employed to explicate electronic structures of the complex. Photocatalytic results suggest that the obtained BiOI/BiOCl composite with 40% BiOI has the highest photoactivity for the degradation of rhodamine-B and quinoline blue under visible light irradiation. All the rhodamine-B and quinoline blue can be degraded in 25 min and 15 min, respectively. To observe the universality of the BiOI/BiOCl, the degradation results of colorless target pollutant (tetracycline) was also investigated. Based on experimental and computational results, origins of the photocatalytic abilities leading to the observed results were proposed. (C) 2016 Elsevier B.V. All rights reserved.