Improving visible-light-driven photocatalytic NO oxidation over BiOBr nanoplates through tunable oxygen vacancies

作     者：Jiazhen Liao Lvcun Chen Minglu Sun Ben Lei Xiaolan Zeng Yanjuan Sun Fan Dong 廖佳珍;陈侣存;孙明禄;雷奔;曾晓岚;孙艳娟;董帆

作者机构：College of Urban Construction and Environmental EngineeringChongqing UniversityChongqing 400044China Chongqing Key Laboratory of Catalysis and New Environmental MaterialsCollege of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2018年第39卷第4期

页      面：779-789页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：国家自然科学基金(21501016,21777011,51478070) 国家重点研发计划(2016YFC02047) 重庆市高校创新团队(CXTDG201602014,CXTDX201601016).重庆市重点自然科学基金(cstc2017jcyjBX0052) 

主　　题：BiOBr nanoplate Oxygen vacancies In situ diffuse reflectance infrared Fourier transform spectroscopy Conversion pathway NO oxidation 

摘      要：In this work,a series of BiOBr nanoplates with oxygen vacancies(OVs)were synthesized by a solvothermal method using a water/ethylene glycol *** number of OVs and facets of BiOBr were tuned by changing the water/ethylene glycol *** the role of OVs in photocatalysis has been investigated,the underlying mechanisms of charge transfer and reactant activation remain *** unravel the effect of OVs on the reactant activation and photocatalytic NO oxidation process,in situ diffuse reflectance infrared Fourier transform spectroscopy,so‐called DRIFTS,and theoretical calculations were performed and their results *** photocatalytic efficiency of the as‐prepared BiOBr was significantly increased by increasing the amount of *** oxygen vacancies had several effects on the photocatalysts,including the introduction of intermediate energy levels that enhanced light absorption,promoted electron transfer,acted as active sites for catalytic reaction and the activation of oxygen molecules,and facilitated the conversion of the intermediate products to the final product,thus increasing the overall visible light photocatalysis *** present work provides new insights into the understanding of the role of OVs in photocatalysts and the mechanism of photocatalytic NO oxidation.