Photocatalytic Hydrogen Evolution Performance for Hydroxyl-rich Porous Carbon Nitride

作     者：WANG Yan LI Liping LI Guangshe WANG Yan;LI Liping;LI Guangshe

作者机构：State Key Laboratory of Inorganic Synthesis and Preparative ChemistryCollege of ChemistryJilin UniversityChangchun 130012P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2020年第36卷第6期

页      面：1053-1058页

核心收录：

学科分类：081704[工学-应用化学] 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.21771075 21671077 21571176 21871106) 

主　　题：Hydroxyl-rich Porous structure Carrier transfer/separation efficiency Hydrogen evolution 

摘      要：Metal-free photocatalyst C3N4 has been well investigated,while how to create hydroxyl-rich porous C3N4 remains a great ***,we report a facile approach to address this issue by developing a novel two-step process:(i)precursor achieved via freeze-drying the mixture o f urea,thiourea and NH4CI;(ii)subsequent thermal polydensation o f the *** sample characterization demonstrated the formation o f C3N4 featured by unique hydroxyl-rich porous structure with an extended tri-s-triazine *** applied as photocatalyst for water splitting under UV-Vis light irradiation,the sample displays a high hydrogen evolution rate o f 243.4μmol·g^-1·h^-1about 4 times higher than that o f C3N4 prepared by conventional *** a performance enhancement could be due to the porous structure and surface hydroxyl-rich functional groups that promote multiple-times reflection and light absorption,increase the active site numbers,and improve carrier transfer/separation efficiency.