Enhanced charge separation by continuous homojunction with spatially separated redox sites for hydrogen evolution

作     者：Mingyuan Yu Tongyu Wang Chengxi Huang Fang Wu Xuan Liu Hailing Huo Hanwen Jian Zikun Liang Jingjing Ma Erjun Kan Ang Li Mingyuan Yu;Tongyu Wang;Chengxi Huang;Fang Wu;Xuan Liu;Hailing Huo;Hanwen Jian;Zikun Liang;Jingjing Ma;Erjun Kan;Ang Li

作者机构：MIIT Key Laboratory of Semiconductor Microstructure and Quantum SensingSchool of ScienceNanjing University of Science and TechnologyNanjing 210094China College of Information Science and TechnologyNanjing Forestry UniversityNanjing 210037China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical EngineeringNingxia UniversityYinchuan 750021China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第10期

页      面：12323-12330页

核心收录：

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

基　　金：the National Natural Science Foundation of China(Nos.22008121,11774173,and 51790492) the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China(No.T2125004) the Fundamental Research Funds for the Central Universities(Nos.30920032204,30920021307,and 30920041115) the Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering(No.2022-K12) the Funding of NJUST(No.TSXK2022D002)for financial support 

主　　题：continuous homojunction spatially separated reaction sites charge separation hydrogen evolution 

摘      要：Photocatalytic hydrogen generation represents a promising strategy for the establishment of a sustainable and environmentally friendly energy ***,the current solar-to-hydrogen conversion efficiency is not yet sufficient for practical hydrogen production,highlighting the need for further research and ***,we report the synthesis of a Sn-doped TiO_(2)continuous homojunction hollow sphere,achieved through controlled calcination *** incorporation of a gradient doping profile has been demonstrated to generate a gradient in the band edge energy,facilitating carrier orientation ***,the hollow sphere’s outer and inner sides provide spatially separated reaction sites allowing for the separate acceptance of holes and electrons,which enables the rapid utilization of carriers after *** a result,the hollow sphere TiO_(2)with gradient Sn doping exhibits a significantly increased hydrogen production rate of 20.1 mmol·g^(−1)·h^(−1).This study offers a compelling and effective approach to the designing and fabricating highly efficient nanostructured photocatalysts for solar energy conversion applications.