2D/2D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H_(2)evolution

作     者：Bo Lin Hao Chen Yao Zhou Xiao Luo Dan Tian Xiaoqing Yan Ruihuan Duan Jun Di Lixing Kang Aimin Zhou Guidong Yang Yonghui Li Jiadong Zhou Zheng Liu Fucai Liu Bo Lin;Hao Chen;Yao Zhou;Xiao Luo;Dan Tian;Xiaoqing Yan;Ruihuan Duan;Jun Di;Lixing Kang;Aimin Zhou;Guidong Yang;Yonghui Li;Jiadong Zhou;Zheng Liu;Fucai Liu

作者机构：School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China Wuhan Second Ship Design and Research InstituteWuhan 430200China School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore College of Materials Science and EngineeringCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China XJTU-Oxford International Joint Laboratory for CatalysisSchool of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing TechnologySchool of ScienceTianjin UniversityTianjin 300350China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education)Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第10期

页      面：3128-3132页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 

基　　金：funded by the China Postdoctoral Science Foundation(pre-station,No.2019TQ0050) Applied Basic Research Program of Sichuan Province(No.2020YJ0068) the China Postdoctoral Science Foundation(No.2020M673186) National Natural Science Foundation of China(No.22002014) National Natural Science Foundation of China(No.11804248) the financial support from the National Natural Science Foundation of China(No.21971113) Natural Science Foundation of Tianjin(No.18JCQNJC03200) supported by MOE Tier 1 RG4/17 and MOE Tier 2 MOE2019-T2-2-105。 

主　　题：2D/2D shell/core interface Atomic double-layer WS_(2) Nb_(2)O_(5)nanosheet Charge transfer Photocatalytic H_(2)evolution 

摘      要：Low-efficiency charge transfer is a critical factor to limit the photocatalytic H_(2)evolution activity of semiconductor photocatalysts.The interface design is a promising approach to achieve high chargetransfer efficiency for photocatalysts.Herein,a new 2 D/2 D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core photocatalyst(DLWS/Nb_(2)O_(5))is designed.The atom-resolved HAADF-STEM results unravel the presence of an unusual 2 D/2 D shell/core interface in DLWS/Nb_(2)O_(5).Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra,the average lifetime of charge carriers for DLWS/Nb_(2)O_(5)(180.97 ps)is considerably shortened as compared to that of Nb_(2)O_(5)(230.50 ps),strongly indicating that the 2 D/2 D shell/core interface enables DLWS/Nb_(2)O_(5)to achieve ultrafast charge transfer from Nb_(2)O_(5)to atomic double-layer WS_(2),thus yielding a high photocatalytic H_(2)evolution rate of 237.6 mmol/h,up to10.8 times higher than that of pure Nb_(2)O_(5)nanosheet.This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.