2D/2D S-scheme heterojunction with a covalent organic framework and g-C_(3)N_(4) nanosheets for highly efficient photocatalytic H2 evolution

作     者：Pengyu Dong Aicaijun Zhang Ting Cheng Jinkang Pan Jun Song Lei Zhang Rongfeng Guan Xinguo Xi Jinlong Zhang 董鹏玉;张艾彩珺;程婷;潘劲康;宋骏;张磊;关荣锋;奚新国;张金龙

作者机构：Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu ProvinceYancheng Institute of TechnologyYancheng 224051JiangsuChina School of Chemistry and Chemical EngineeringYancheng Institute of TechnologyYancheng 224051JiangsuChina Key Laboratory for Ecological-Environment Materials of Jiangsu ProvinceSchool of Materials Science and EngineeringYancheng Institute of TechnologyYancheng 224051JiangsuChina Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringShanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource UtilizationEast China University of Science and TechnologyShanghai 200237China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2022年第43卷第10期

页      面：2592-2605页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 081705[工学-工业催化] 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：国家自然科学基金(51772258,21403184,21972040,21878257) 江苏省“青蓝工程”项目 江苏省研究生科研与实践创新项目(KYCX21_3147) 上海市教委创新计划项目(2021-01-07-00-02-E00106) 江苏省高等学校优秀科技创新团队 江苏省自然科学基金(BK20191024) 上海市科学技术委员会(20DZ2250400) 

主　　题：Covalent organic framework g-C_(3)N_(4) π-πConjugated 2D/2D material S-Scheme heterojunction Photocatalytic hydrogen evolution 

摘      要：The fabrication of S-scheme heterojunctions with fast charge transfer and good interface contacts,such as intermolecularπ–πinteractions,is a promising approach to improve photocatalytic performance.A unique two-dimensional/two-dimensional(2D/2D)S-scheme heterojunction containing TpPa-1-COF/g-C_(3)N_(4) nanosheets(denoted as TPCNNS)was *** established maximum interfacial interaction between TpPa-1-COF NS and g-C_(3)N_(4) NS may result in aπ–πconjugated ***,the difference in the work functions of TpPa-1-COF and g-C_(3)N_(4) results in a large Fermi level gap,leading to upward/downward band edge *** spontaneous interfacial charge transfer from g-C_(3)N_(4) to TpPa-1-COF at theπ–πconjugated interface area results in the presence of a built-in electric field,according to the charge density difference analysis based on density functional theory *** an enhanced built-in electric field can efficiently drive directional charge migration via the S-scheme mechanism,which enhances charge separation and ***,an approximately 2.8 and 5.6 times increase in the photocatalytic hydrogen evolution rate was recorded in TPCNNS-2(1153μmol g^(-1) h^(-1))compared to pristine TpPa-1-COF and g-C_(3)N_(4) NS,respectively,under visible light ***,this work opens new avenues in the fabrication of 2D/2Dπ–πconjugated S-scheme heterojunction photocatalysts with highly efficient hydrogen evolution performance.