Assembling S-scheme heterojunction between basic bismuth nitrate and bismuth tungstate with promoting charges’separation for accelerated photocatalytic sulfamethazine degradation  

作　　者：Wenhan Chen Meng Dai Li Xiang Shan Zhao Shuguang Wang Zuoli He 

机构地区：[1]Shandong Key Laboratory of Water Pollution Control and Resource Reuse,Shandong Key Laboratory of Environmental Processes and Health,School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China [2]CEDAR,Knight Cancer Institute,School of Medicine,Oregon Health and Science University,Portland,OR 97201,United States [3]Weihai Research Institute of Industrial Technology of Shandong University,Shandong University,Weihai 264209,China

出　　处：《Journal of Materials Science & Technology》2024年第4期185-197,共13页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22278245);the Young Taishan Scholars Program of Shandong Province(No.tsqn.201909026);the Youth Interdisciplinary Science and Innovative Research Groups of Shandong University supported by the Fundamental Research Funds for the Central Universities(No.2020QNQT014);the Shandong University Future Youth Grant Program(No.61440089964189).

摘　　要：The S-scheme heterojunction has garnered increasing attention due to its remarkable oxidation capacity and efficient separation of photogenerated carriers.In this study,a one-pot glycerol-assisted hydrothermal process was utilized to successfully synthesize S-scheme heterojunction photocatalysts comprising basic bismuth nitrate(BBN)and bismuth tungstate(BWO).Interestingly,the BBN/BWO heterogeneous photo-catalysts exhibited the highest photocatalytic properties.The optimized product achieved the degradation of sulfamethazine(SMZ)within 1 h,with a kinetic constant(k)value of 0.05818 min^(−1).The degradation process was influenced significantly by·O^(2)−and h^(+)species.To determine the degradation pathway of SMZ in the presence of BBN/BWO-0.6,liquid chromatography-mass spectrometry(LC-MS)analysis was performed,which revealed a decrease in the toxicity of intermediates and products.The enhanced pho-tocatalytic activity can be attributed to the internal electric field(IEF)of the S-scheme heterojunction between BBN and BWO,effectively promoting the separation of photogenerated carriers.This research presents a viable approach for developing S-scheme heterojunctions in SMZ photodegradation and other environmental applications.

关 键 词：PHOTOCATALYSIS S-scheme HETEROJUNCTION Bi_(2)WO_(6) SULFAMETHAZINE 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]