Co3O4/CdS p-n heterojunction for enhancing photocatalytic hydrogen production: Co-S bond as a bridge for electron transfer

被引：109

作者：

Chen, Liuyun ^{[1
]}

Xie, Xinling ^{[1
]}

Su, Tongming ^{[1
]}

Ji, Hongbing ^{[1
,2
]}

Qin, Zuzeng ^{[1
]}

机构：

[1] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Electrochem Energy Mat, Nanning 530004, Peoples R China

[2] Sun Yat Sen Univ, Sch Chem, Fine Chem Ind Res Inst, Guangzhou 510275, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 567卷

基金：

中国国家自然科学基金;

关键词：

Photocatalytic water splitting; Hydrogen production; P-n heterojunction; Co-S bond; GRAPHENE OXIDE; WATER; CDS; PERFORMANCE; REDUCTION; TIO2; NANOPARTICLES; EVOLUTION; SHELL; ENHANCEMENT;

D O I：

10.1016/j.apsusc.2021.150849

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalytic hydrogen production from water splitting production is a promising strategy to solve the energy crisis and environmental pollution. In the present work, Co3O4/CdS composites were prepared by ultrasonication and stirring, and used for photocatalytic water splitting. The results showed a Co-S chemical bonds were formed at the interfaces between the Co3O4 and the CdS, which promoted the charge transfer rate between the CdS and Co3O4. Meanwhile, the recombination of the electron-hole pairs was further restrained by the Co3O4/CdS p-n heterojunction. The 10%-Co3O4/CdS composites exhibited an excellent photocatalytic hydrogen production rate of 142.62 mu mol.h(-1), which was 20 times higher than that of CdS (6.85 mu mol.h(-1)), and the Co3O4/CdS showed excellent stability in the photocatalytic water splitting reaction. Moreover, a formation process of Co3O4/CdS p-n heterojunction and a mechanism of Co3O4/CdS p-n heterojunction avoiding the recombination of photocatalytic electrons and holes to enhance photocatalytic activity was proposed.

引用

页数：13

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