Construction of direct Z-scheme BPQDs-modified BiOBr thin film for enhanced photocatalytic performance under visible light irradiation

作     者：Ziyu Yao Huajun Sun Yunlong Hu Xiaofang Liu Yong Zhang 

作者机构：State Key Laboratory of Silicate Materials for ArchitecturesCenter for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan430070China Advanced Ceramics Institute of Zibo New&High-Tech Industrial Development ZoneZibo255000China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2021年第7卷第5期

页      面：1122-1130页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.52002301,U1806221,51672198) Natural Science Foundation of Hubei Province(Grant No.2020CFB308) Start-up Funding ofWuhan University of Technology(Grant No.40120490) Innovation and Development Project of Zibo City(2017 C×01 A022) Instruction&Development Project for National Funding Innovation Demonstration Zone of Shandong Province(2016-181-11,2017-41-1,2017-41-3,2018ZCQZB01,2019ZCQZB03) Central Guiding Local Science and Technology Development Special Funds(Grant Nos.2060503) Key Research&Design Program of Shandong Province(2019GGX102011). 

主　　题：Photocatalytic thin films Direct Z-scheme Surface modification BPQDs BiOBr 

摘      要：Surface modification on photocatalytic thin films is long considered as an effective strategy to improve the degradation performance,which in turn helps to alleviate the worldwide environmental pollution issue.In this study,a direct Z-scheme photocatalytic system is constructed successfully by integrating black phosphorus quantum dots(BPQDs)on the surface of BiOBr thin film prepared by hydrothermal method.The optimal BPQDs/BiOBr-1 thin film presents remarkable enhanced photocatalytic activity for degrading methyl violet(MV)and tetracycline hydrochloride(TC),which is 3 and 3.65 times higher than that of pure BiOBr counterpart.The active species involved in the reaction are ^(+),·O_(2)^(-),and·OH,which determined by radical trapping experiments.The formation of direct Z-scheme photocatalytic system makes electrons assembled in the conduction band(CB)of BPQDs and holes gathered in the valence band(VB)of BiOBr,which supports the generation of h^(+) and·O_(2)^(-) and in turn accelerates the photocatalytic reaction.Besides,the improved efficiency of charge separation,enhanced visible light absorption and enlarged specific surface area also contributed to the enhanced photocatalytic performance of BPQDs/BiOBr.This work provides a feasible strategy for optimizing photocatalytic thin films via detailed analyzing the role of BPQDs in the construction of direct Z-scheme photocatalysts.