Construction of highly active WO_(3)/TpPa-1-COF S-scheme heterojunction toward photocatalytic H_(2)generation

作     者：Long Sun Lingling Li Jiajie Fan Quanlong Xu Dekun Ma Long Sun;Lingling Li;Jiajie Fan;Quanlong Xu;Dekun Ma

作者机构：School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450002China College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325027China School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals ProcessShaoxing UniversityShaoxing 312000China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第123卷第28期

页      面：41-48页

核心收录：

学科分类：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：supported by the National Natural Science Foundation of China(Nos.52073263,21905209,21673160) the Natural Science Foundation of Henan Province(No.212300410080) 

主　　题：Covalent organic framework(COF) WO_(3) S-scheme heterojunction Photocatalytic H_(2)evolution 

摘      要：The rapid charge recombination and low surface reaction kinetics are the two major constraints to the photocatalytic performance of covalent organic frameworks(COFs).To accelerate the charge separation behavior,TpPa-1-COF is decorated with WO_(3)Bvia an in-situ growth approach,and the resultant WO_(3)/TpPa-1-COF composites show significantly improved photocatalytic ***,when the WO_(3)loading arrives at 3 wt%,3%WO_(3)/TpPa-1-COF exhibits the maximum photocatalytic H_(2)evolution rate of 19.89 mmol g^(-1)h^(-1),which is approximately 4.8 times higher than that of pure *** apparent quantum efficiency(AQE)of 3%WO_(3)/TpPa-1-COF at 420 nm is detected to be 12.4%.X-ray photoelectron spectroscopy(XPS)characterization confirms the formation of internal electric field between WO_(3)and TpPa-1-CF,which can drive the photogenerated charge carrier diffusion in S-scheme *** a result,WO_(3)/TpPa-1-COF composite possesses high charge separation efficiency and strong redox ability,which is further supported by the photoelectrochemical results,thus benefiting the photocatalysis *** work provides a rational strategy to modify COFs in photocatalytic water splitting.