Internal Electric Field-Modulated Charge Migration Behavior in MoS2/MIL-53(Fe) S-Scheme Heterojunction for Boosting Visible-Light-Driven Photocatalytic Chlorinated Antibiotics Degradation

被引：33
作者：
Liu, Meng [1 ]
Ning, Yuting [1 ]
Ren, Meng [1 ]
Fu, Xinping [1 ]
Cui, Xuedan [1 ]
Hou, Daibing [1 ]
Wang, Zihan [1 ]
Cui, Jun [1 ]
Lin, Aijun [1 ]
机构：
[1] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
来源：
SMALL | 2023年 / 19卷 / 46期
基金：
中国国家自然科学基金;
关键词：
band bending; dechlorination; internal electric field; photocatalysis; s-scheme heterojunction; SITES;
D O I：
10.1002/smll.202303876
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Inadequate photo-generated charge separation, migration, and utilization efficiency limit the photocatalytic efficiency. Herein, a MoS2/MIL-53(Fe) photocatalyst/activator with the S-scheme heterojunction structure is designed and the charge migration behavior is modulated by the internal electric field (IEF). The IEF intensity is enhanced to 40 mV by modulating band bending potential and the depletion layer length of MoS2. The photo-generated electron migration process is boosted by constructing the electron migration bridge (Fe-O-S) and modulating the IEF as the driving force, confirmed by the density functional theory calculation. Compared with the pristine materials, the photocurrent density of MoS2/MIL-53(Fe) is significantly enhanced 27.5 times. Contributed by the visible-light-driven cooperative catalytic degradation and the high-efficiency direct photo-generated electron reduction dichlorination process, satisfactory chlorinated antibiotics removal and detoxification performances are achieved. This study opens up new insights into the application of heterojunctions in photocatalytic activation of PDS in environmental remediation.
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页数：15
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