Self-assembled S-scheme In_(2.77)S_(4)/K^(+)-doped g-C_(3)N_(4)photocatalyst with selective O_(2)reduction pathway for efficient H_(2)O_(2)production using water and air

作     者：Qiqi Zhang Hui Miao Jun Wang Tao Sun Enzhou Liu 张棋祺;苗慧;王俊;孙涛;刘恩周

作者机构：School of Chemical Engineering/Xi’an Key Laboratory of Special Energy MaterialsNorthwest UniversityXi’an 710127ShaanxiChina School of PhysicsNorthwest UniversityXi’an 710127ShaanxiChina School of Electrical Engineering and AutomationWuhan UniversityWuhan 430072HubeiChina 

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

年 卷 期：2024年第63卷第8期

页      面：176-189页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 070303[理学-有机化学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：国家自然科学基金(22378326,22078261,11974276) 陕西省自然科学基础研究计划项目(2023-JC-YB-115) 陕西省重点科技创新团队项目(2022TD-33) 陕西省秦创原项目(QCYRCXM-2022-213) 

主　　题：Photocatalysis H_(2)O_(2)production K^(+)-doped g-C3N4 In2.77S4 S-scheme heterojunction 

摘      要：The development of an efficient artificial H_(2)O_(2)photosynthesis system is a challenging work using H_(2)O and O_(2)as starting ***,3D In2.77S_(4)nanoflower precursor was in-situ deposited on K^(+)-doped g-C_(3)N_(4)(KCN)nanosheets using a solvothermal method,then In2.77S_(4)/KCN(IS/KCN)het-erojunction with an intimate interface was obtained after a calcination *** investigation shows that the photocatalytic H_(2)O_(2)production rate of 50IS/KCN can reach up to 1.36 mmol g^(-1)h^(-1)without any sacrificial reagents under visible light irradiation,which is 9.2 times and 4.1 times higher than that of KCN and In2.77S_(4),*** enhanced activity of the above composite can be mainly attributed to the S-scheme charge transfer route between KCN and In2.77S_(4)according to density functional theory calculations,electron paramagnetic resonance and free radical capture tests,leading to an expanded light response range and rapid charge separation at their interface,as well as preserving the active electrons and holes for H_(2)O_(2)***,the unique 3D nanostructure and surface hydrophobicity of IS/KCN facilitate the diffusion and transportation of O_(2)around the active centers,the energy barriers of O_(2)protonation and H_(2)O_(2)desorption steps are ef-fectively reduced over the *** addition,this system also exhibits excellent light harvesting ability and *** work provides a potential strategy to explore a sustainable H_(2)O_(2)photo-synthesis pathway through the design of heterojunctions with intimate interfaces and desired reac-tion thermodynamics and kinetics.