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

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Title of Paper:Assembling S-scheme heterojunction between basic bismuth nitrate and bismuth tungstate with promoting charges' separation for accelerated photocatalytic sulfamethazine degradation

Journal:Journal of Materials Science and Technology

Place of Publication:Elsevier

Key Words:Photocatalysis; S-scheme; Heterojunction; Bi2WO6; Sulfamethazine

Abstract: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 photocatalysts 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 ·O2- 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 photocatalytic 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.

All the Authors:Meng Dai,Li Xiang,Shan Zhao,Shuguang Wang

First Author:Wenhan Chen

Indexed by:Journal paper

Correspondence Author:Zuoli He

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:171

Page Number:185-197

Number of Words:8000

Translation or Not:no

Date of Publication:2024-02-01

Included Journals:SCI