Introducing B–N unit boosts photocatalytic H_(2)O_(2) production on metal-free g-C_(3)N_(4)nanosheets
作者机构：School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212100China School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China School of Chemistry and Materials Science Institute of Advanced Materials and Flexible Electronics(IAMFE)Nanjing University of Information Science and TechnologyNanjing 210044China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第2期
页 面：2177-2184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 Jiangsu Provincial Double-Innovation Doctor Program(JSSCBS20210996)
主 题：graphitic carbon nitride(g-C_(3)N_(4))nanosheets metal-free photocatalyst B–N bonds oxygen reduction reaction H2O2 production
摘 要：Metal-free catalyst for photocatalytic production of H_(2)O_(2)is highly desirable with the long-term vision of artificial photosynthesis of solar *** particular,the specific chemical bonds for selective H_(2)O_(2)photosynthesis via 2e–oxygen reduction reactions(ORR)remain to be explored for understanding the forming mechanism of active ***,we report a facile doping method to introduce boron-nitrogen(B–N)bonds into the structure of graphitic carbon nitride(g-C_(3)N_(4))nanosheets(denoted as BCNNS)to provide significant photocatalytic activity,selectivity and *** theoretical calculation and experimental results reveal that the electron-deficient B–N units serving as electron acceptors improve photogenerated charge separation and *** units are also proved to be superior active sites for selective O_(2)adsorption and activation,reducing the energy barrier for*OOH formation,and thereby enabling an efficient 2e–ORR pathway to H_(2)O_(2).Consequently,with only bare loss of activity during repeated cycles,the optimal H2O2 production rate by BCNNS photocatalysts reaches 1.16 mmol·L^(–1)·h^(–1)under 365 nm-monochrome light emitting diode(LED365nm)irradiation,increasing nearly 2–5 times as against the state-of-art metal-free *** work gives the first example of applying B–N bonds to enhance the photocatalytic H_(2)O_(2)production as well as unveiling the underlying reaction pathway for efficient solar-energy transformations.
维普期刊数据库