In Situ Construction of Bi12O17Cl2/Bi2S3 S-Scheme Heterojunctions with Enriched Oxygen Vacancies to Enhance Photocatalytic Activity

被引:0
作者
Guo, Biao [1 ]
Wang, Xianyu [1 ]
Wu, Xia [1 ]
Sun, Xinying [1 ]
Li, Xinyuan [1 ]
Liu, Xinxin [1 ]
Zhou, Lijing [1 ]
Zhao, Zhen [1 ,2 ]
机构
[1] Shenyang Normal Univ, Inst Catalysis Energy & Environm, Coll Chem & Chem Engn, Shenyang 110034, Peoples R China
[2] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
基金
中国国家自然科学基金;
关键词
BIVO4-AT-BI2S3; HETEROJUNCTION; BISPHENOL-A; REDUCTION; CR(VI); RICH; DEGRADATION; HETEROSTRUCTURES; PERFORMANCE; FABRICATION; EFFICIENCY;
D O I
10.1021/acs.iecr.4c04683
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The construction of S-scheme heterojunctions with oxygen vacancies (OVs) is an effective strategy to enhance the photocatalytic activity. In this pioneering study, we successfully fabricated Bi12O17Cl2/Bi2S3 S-scheme heterojunctions with abundant OVs (ROV-BOC/BS) using an anion exchange method. The in situ growth of Bi2S3 (BS) nanorods on OVs-rich Bi12O17Cl2 (ROV-BOC) nanosheets resulted in an interconnected reticulated structure. This structure not only increased the specific surface area of the composite but also established a tightly bound heterojunction, further enhancing the OVs content in the composites. The OVs-induced defect levels provide additional channels for photogenerated charge migration. The synergy between the heterojunction and OVs improved the light absorption and carrier separation efficiency. Consequently, the optimized ROV-BOC/BS-0.1 achieved 95.52% Cr(VI) removal efficiency within 120 min, with apparent reaction rate constants 5.39 and 23.86 times higher than those of pure ROV-BOC and BS, respectively. This investigation provides crucial guidance for designing novel S-scheme heterojunction photocatalysts with abundant OVs.
引用
收藏
页码:3841 / 3855
页数:15
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