In-situ Synthesis of SnO2 Quantum Dots/ZnS Nanosheets Heterojunction as a Visible-light-driven Photocatalyst for Degradation of Rhodamine B,Potassium Dichromate and Tetracycline  

作　　者：ZHANG Chenxu WU Xiangfeng JIA Yunning CHANG Tianlong LIU Zhifeng FU Yunxuan LIU Xutao WANG Hui SHI Yimai ZUO Yuqian 张琛旭;吴湘锋;JIA Yunning;CHANG Tianlong;LIU Zhifeng;FU Yunxuan;LIU Xutao;王惠;SHI Yimai;ZUO Yuqian(School of Materials Science and Engineering,Hebei Provincial Key Laboratory of Traffic Engineering Materials,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Tianjin Key Laboratory of Building Green Functional Materials,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]School of Materials Science and Engineering,Hebei Provincial Key Laboratory of Traffic Engineering Materials,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [2]Tianjin Key Laboratory of Building Green Functional Materials,Tianjin Chengjian University,Tianjin 300384,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第4期719-725,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Natural Science Foundation of Hebei Province(Nos.E2019210251 and B2019210331);the Innovation Ability Improv-ement Project of Hebei Province(20543601D)。

摘　　要：The SnO2 quantum dots(SnO2QDs)/ZnS nanosheets(ZnSNs)heterojunction was fabricated via an in-situ synthetic method at room temperature.Rhodamine B,potassium dichromate,and tetracycline were used to discuss the photocatalytic activities of the as-prepared samples under the visible light illumination.The photocatalytic mechanism of the as-prepared samples was also proposed.The experimental results indicate that the degradation efficiency of the as-prepared SnO2QDs/ZnSNs heterojunction first increases and then decreases with increasing the usage of ZnSNs.When the mass ratio of SnO2QDs to ZnSNs is 1:2 in 180 min,the as-prepared samples have the highest degradation efficiency of 89.1%for rhodamine B,97.7%for potassium dichromate,and 83.8%for tetracycline,which are much higher than 51.7%,26.8%,and 0.9%of pure SnO2QDs as well as 37.9%,87.1%,and 19.1%of pure ZnSNs,respectively.After it is repeatedly degraded for 3 times,it possesses the degradation efficiency of 62.5%for rhodamine B,which increases by 200.5%in comparison with 20.8%of the pure SnO2QDs.Moreover,the enhanced photocatalytic performances of the as-prepared hybrids are attributed to the formation of heterojunction between the SnO2QDs and ZnSNs.In addition,hydroxyl radicals and superoxide anion radicals play major roles during the photocatalytic degradation process,while holes play a minor role.

关 键 词：ZnS nanosheets SnO2 quantum dots photocatalysis 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]