WO_(3)/Bi_(2)S_(3)异质结光催化剂的制备及其降解水体中四溴双酚A的研究  

Preparation of WO_(3)/Bi_(2)S_(3)heterojunction photocatalysts and its performance in photocatalytic degradation of tetrabromobisphenol A in water

作　　者：徐彬 李敏杰 张碧红 郭良宏 XU Bin;LI Minjie;ZHANG Bihong;GUO Lianghong(College of Energy Environment and Safety Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学能源环境与安全工程学院,浙江杭州310018

出　　处：《中国计量大学学报》2024年第3期470-479,共10页Journal of China University of Metrology

基　　金：国家自然科学基金项目(No.U20A20133)。

摘　　要：目的:研究WO_(3)/Bi_(2)S_(3)异质结光催化剂在低光照强度下(100 W)对水体中四溴双酚A(TBBPA)的降解性能。方法:通过溶剂热法制备一系列不同摩尔比的WO_(3)/Bi_(2)S_(3)异质结光催化剂;采用SEM、TEM、XRD、XPS等方法对合成的材料进行表征。探究WO_(3)/Bi_(2)S_(3)在低光照强度下对TBBPA的降解效率。通过自由基淬灭实验和电子自旋光谱解析WO_(3)/Bi_(2)S_(3)光催化体系对TBBPA降解机制。结果:在100 W光照强度下,摩尔比为1∶6的WO_(3)/Bi_(2)S_(3)光催化剂在用量为60 mg以及pH为8时具有最佳的降解效率,在150 min内对5.4 mg/L TBBPA的降解率约为76.3%。此外,TBBPA的降解主要通过空穴氧化实现。结论:WO_(3)/Bi_(2)S_(3)异质结光催化剂可在低光照强度下有效降解水体中的TBBPA。Aims:This paper aims to study the degradation performance of tetrabromobisphenol A(TBBPA)in water by WO_(3)/Bi_(2)S_(3) heterojunction photocatalysts under low light intensity.Methods:A series of WO_(3)/Bi_(2)S_(3) heterojunction photocatalysts with different molar ratios were prepared using the solvothermal method.The synthesized materials were characterized by SEM,TEM,XRD,XPS,etc.The degradation efficiency of WO_(3)/Bi_(2)S_(3) for TBBPA was studied by photocatalytic experiments under low light intensity.The degradation mechanisms of TBBPA by the WO_(3)/Bi_(2)S_(3) photocatalytic system were analyzed by radical quenching experiment and electron spin spectroscopy.Results:The WO_(3)/Bi_(2)S_(3) heterojunction with a molar ratio of 1∶6 had the best degradation efficiency at a dosage of 60 mg and pH of 8 under 100 W light intensity;and the degradation rate of 5.4 mg/L TBBPA was about 76.3% in 150 min.In addition,the degradation of TBBPA was mainly achieved through hole oxidation.Conclusions:The prepared WO_(3)/Bi_(2)S_(3) heterojunction photocatalyst can effectively degrade the TBBPA in the aqueous environment.

关 键 词：四溴双酚A 光催化 降解 三氧化钨 硫化铋 异质结 

分 类 号：X522[环境科学与工程—环境工程]