Abstract
Carbon nitride(g-C3N4)is an attractive photocatalyst but commonly suffers from high photogenerated electron-hole recombination rate,low specific surface area,and narrow visible-light response range.Herein,3D ordered macroporous(3DOM)g-C3N4/CdS was constructed by a feasible and inexpensive syn-thesis strategy of using template and light-assisted methods to solve the above problems.The formed heterostructure with suitable morphology,band structure,and extended light absorption range is bene-ficial to promoting photocatalytic H2 generation.3DOM g-C3N4/CdS exhibits a high H2 produce rate of 718.6 umol h-1 g-1,which is 73.3 times higher than that of g-C3N4 and 25.4 times higher than that of 3DOM g-C3N4.The 3DOM structure can effectively increase the path length of light of g-C3N4,improve the light energy conversion efficiency,and shorten the carrier transport distance.CdS enhances visible-light response and produces many surface sites.Constructing a stable and tight interface between 3DOM g-C3N4 and CdS can promote the migration of photogenerated electrons and holes and consequently the visible-light catalytic activity.This study offers an effective designing strategy for heterostructure photo-catalysts to achieve high activity and stable solar H2 production.
基金项目
国家自然科学基金(51862023)
国家自然科学基金(51662030)
国家自然科学基金(21868016)
江西省自然科学基金(20212BAB204051)
NETL
NSTL
万方数据