| 论文标题 |
Construction of a transition-metal sulfide heterojunction photocatalyst driven by a built-in electric field for efficient hydrogen evolution under visible light |
| 作者 |
Weibo Zhang, Qiuyue Xu, Xiaoqiu Tang, Hualin Jiang,*, Jinwen Shi, Vyacheslav Fominski, Yingchen Bai,*, Pinghua Chen,* Jianping Zou |
| 发表/完成日期 |
2023-06-16 |
| 期刊名称 |
Journal of Colloid And Interface Science |
| 期卷 |
649 |
| 相关文章 |
1-s2.0-S0021979723011074-main.pdf
|
| 论文简介 |
Photocatalytic H2 evolution is of prime importance in the energy crisis and in lessening environmental pollution. Adopting a single semiconductor as a photocatalyst remains a formidable challenge. However, the construction of an S-scheme heterojunction is a promising method for efficient water splitting. In this work, CdS nanoparticles were loaded onto NiS nanosheets to form CdS/NiS nanocomposites using hollow Ni(OH)2 as a precursor. The differences in the Fermi energy levels between the two components of CdS and NiS resulted in the formation of a built-in electric field in the nanocomposite. Density functional theory (DFT) calculations reveal that the S-scheme charge transfer driven by the built-in electric field can accelerate the effective separation of photogenerated carriers, which is conducive to efficient photocatalytic hydrogen evolution. The hydrogen evolution rate of the optimized photocatalyst is 39.68 mmol·g−1 h−1, which is 6.69 times that of CdS under visible light. This work provides a novel strategy to construct effective photocatalysts to relieve the environmental and energy crisis. |
(创新港)
