Electrostatic self-assembly of 2D/2D CoWO_(4)/g-C_(3)N_(4)p-n heterojunction for improved photocatalytic hydrogen evolution:Built-in electric field modulated charge separation and mechanism unveiling

作     者：Haiyang Wang Ranran Niu Jianhui Liu Sheng Guo Yongpeng Yang Zhongyi Liu Jun Li Haiyang Wang;Ranran Niu;Jianhui Liu;Sheng Guo;Yongpeng Yang;Zhongyi Liu;Jun Li

作者机构：Henan Institute of Advanced TechnologyCollege of ChemistryZhengzhou UniversityZhengzhou 450052China School of Chemistry and Environmental EngineeringWuhan Institute of TechnologyWuhan 430205China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第8期

页      面：6987-6998页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Outstanding Talent Research Fund of Zhengzhou University,China Postdoctoral Science Foundation(Nos.2020TQ0277 and 2020M682328) Central Plains Science and Technology Innovation Leader Project(No.214200510006) Postdoctoral Science Foundation of Henan province(No.202002010) 

主　　题：p-n junction interfacial charge transfer two-dimensional/two-dimensional photocatalytic H_(2)generation CoWO_(4)/g-C_(3)N_(4)heterojunction 

摘      要：Two-dimensional(2D)semiconductor heterojunctions are considered as an effective strategy to achieve fast separation of photoinduced ***,a novel CoWO_(4)/g-C_(3)N_(4)(CWO/CN)p–n junction was synthesized using an electrostatic selfassembly *** constructed 2D/2D p–n heterostructure had a rich hetero-interface,increased charge density,and fast separation efficiency of photoinduced *** in-situ Kelvin probe force microscopy confirmed that the separation pathway of photoinduced carriers through the interface obeyed an II-scheme charge transfer *** 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 *** the optimized conditions,the CWO/CN heterojunction displayed enhanced photocatalytic H_(2)generation activity under full spectrum and visible lights irradiation,*** study provides a novel approach to design 2D/2D hetero-structured photocatalysts based on p–n type semiconductor for photocatalytic H_(2)generation.