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J Colloid Interface Sci


Title:A compact Z-scheme heterojunction of BiOCl/Bi(2)WO(6) for efficiently photocatalytic degradation of gaseous toluene
Author(s):Yang J; Yang L; Fang M; Li L; Fu F; Xu H; Li M; Fan X;
Address:"Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China. Electronic address: jyang10619@swjtu.edu.cn. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China. School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 610031, China; CRRC NANJING PUZHEN CO, LTD, Nanjing 210031, China. CRRC Academy, Beijing 100071, China. Electronic address: lmg0520@126.com"
Journal Title:J Colloid Interface Sci
Year:2023
Volume:20221109
Issue:Pt B
Page Number:44 - 54
DOI: 10.1016/j.jcis.2022.11.023
ISSN/ISBN:1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:"Construction of Z-scheme heterojunction photocatalysts with efficient electron-hole pairs separation and robust oxidation abilities is a promising strategy to decompose volatile organic compounds (VOCs). Herein, UV-light-driven BiOCl and visible-light-driven Bi(2)WO(6) were successfully combined via a one-pot hydrothermal method and compact Z-scheme heterojunction photocatalyst BiOCl/Bi(2)WO(6) was obtained. Owing to the similar precursors and synthesis conditions, the integrated BiOCl/Bi(2)WO(6) heterojunction was intimate and homogenous, which resulted in the efficient separation of photogenerated carriers, and generated abundant holes (h(+)), hydroxyl radicals (.OH) and superoxide radicals (.O(2)(-)). The optimal BiOCl/Bi(2)WO(6) photocatalyst (BWOCl-2), achieved by tailoring the amount of hydrochloric acid, exhibited almost 100 % of toluene degradation and excellent durability. Electron spin resonance (ESR) results revealed that h(+), .O(2)(-) and .OH were dominant active species in the BiOCl/Bi(2)WO(6) photocatalytic system. The degradation intermediate products were monitored by in situ Diffuse Reflection Infrared Fourier Transform spectroscopy (DRIFTS) and the possible photocatalytic mechanism was also revealed according to the band structure of BiOCl/Bi(2)WO(6) heterojunction. This work provided a novel avenue to design an efficient homogenous heterojunction photocatalyst for the efficient degradation of VOCs under sunlight"
Keywords:Degradation mechanism In situ DRIFTS Photocatalysts Reaction pathways Volatile organic compounds;
Notes:"PubMed-not-MEDLINEYang, Jian Yang, Lei Fang, Ming Li, Lei Fu, Fan Xu, Hao Li, Minggao Fan, Ximei eng 2022/11/18 J Colloid Interface Sci. 2023 Feb; 631(Pt B):44-54. doi: 10.1016/j.jcis.2022.11.023. Epub 2022 Nov 9"

 
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