期刊
NANO RESEARCH
卷 15, 期 8, 页码 6987-6998出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4329-z
关键词
p-n junction; interfacial charge transfer; two-dimensional/two-dimensional; photocatalytic H-2 generation; CoWO4/g-C3N4 heterojunction
类别
资金
- Outstanding Talent Research Fund of Zhengzhou University
- China Postdoctoral Science Foundation [2020TQ0277, 2020M682328]
- Central Plains Science and Technology Innovation Leader Project [214200510006]
- Postdoctoral Science Foundation of Henan province [202002010]
In this study, a two-dimensional semiconductor heterojunction was synthesized using an electrostatic self-assembly method, and the mechanism of photoinduced carrier separation was revealed through experimental and theoretical calculations. Under optimized conditions, the heterojunction exhibited excellent photocatalytic hydrogen generation performance.
Two-dimensional (2D) semiconductor heterojunctions are considered as an effective strategy to achieve fast separation of photoinduced carriers. Herein, a novel CoWO4/g-C3N4 (CWO/CN) p-n junction was synthesized using an electrostatic self-assembly method. The constructed 2D/2D p-n heterostructure had a rich hetero-interface, increased charge density, and fast separation efficiency of photoinduced carriers. The in-situ Kelvin probe force microscopy confirmed that the separation pathway of photoinduced carriers through the interface obeyed an II-scheme charge transfer mechanism. Experimental results and density functional theory calculations indicated the differences of work function between CWO and CN induced the generation of built-in electric field, ensuring an efficient separation and transfer process of photoinduced carriers. Under the optimized conditions, the CWO/CN heterojunction displayed enhanced photocatalytic H-2 generation activity under full spectrum and visible lights irradiation, respectively. Our study provides a novel approach to design 2D/2D hetero-structured photocatalysts based on p-n type semiconductor for photocatalytic H-2 generation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据