Interfacial chemical bond modulated Bi19S27Br3/g-C3N4 Z-scheme heterojunction for enhanced photocatalytic CO2 conversion

Zhao, Junze ¹Ji, Mengxia ¹Chen, Hailong ²Weng, Yu-Xiang ²Zhong, Jun ³Li, Yingjie ¹Wang, Shengyao ⁴Chen, Ziran ⁵Xia, Jiexiang ¹Li, Huaming¹

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作者信息

1. Jiangsu Univ
2. Chinese Acad Sci
3. Soochow Univ
4. Huazhong Agr Univ
5. Sichuan Vocat & Tech Coll
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Abstract

Direct Z-scheme heterojunction can primely facilitate separation efficiency of the photogenerated carriers and maximize the redox ability of as-prepared photocatalyst, which has been regarded as one of the promising strategies to increase photocatalytic CO(2 )conversion efficiency. Herein, a novel interfacial C-S bond modulated Z scheme heterojunction Bi19S27Br3/g-C(3)N(4 )composite is constructed to accelerate the photogenerated electron transfer from g-C3N4 to Bi19S27Br3, offering much more excited reductive electrons to the surface of Bi19S27Br3 where owns lower CO2 adsorption energy, which is more conducive to CO2 reduction conversion. Without adding sacrificial agent or photosensitizer, the photocatalytic CO(2 )conversion to CO yield of Bi19S27Br3/g-C3N4 reaches up to 12.87 mu mol g(-1) h(-1), which is 5 and 4-fold of Bi(19)S27Br(3 )and g-C3N4, respectively. This study provides the new insight in precisely tailoring photogenerated charge separation direction by establishing chemical bond in direct Z-scheme structure for CO(2 )photoreduction.

Key words

Z-scheme/Bi(19)S(27)Br(3/)g-C3N4/Chemical bond/CO2 photoreduction/Charge transfer/REDUCTION/G-C3N4/NANOSHEETS

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量64

参考文献量55

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