Synergy of sodium doping and nitrogen defects in carbon nitride for promoted photocatalytic synthesis of hydrogen peroxide  

作　　者：Fabrice Nelly Habarugira Ducheng Yao Wei Miao Chengcheng Chu Zhong Chen Shun Mao 

机构地区：[1]College of Environmental Science and Engineering,State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China [2]Baowu Water Technology Co.,Ltd.Research Institute,Shanghai 201999,China

出　　处：《Chinese Chemical Letters》2024年第8期324-329,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22376159);the Fundamental Research Funds for the Central Universities(No.2022-4-ZD-08).

摘　　要：Photocatalytic synthesis of hydrogen peroxide has gradually become a promising method for in-situ pro-duction of hydrogen peroxide,which relies on sustainable solar energy.However,the commonly used photocatalyst,i.e.,carbon nitride(CN),still suffers from the drawbacks of narrow light absorption range and fast charge recombination.Here,we report a facile method to introduce nitrogen defects into carbon nitride together with sodium ion.By adjusting the ratio of sodium dicyandiamide,the band gap of carbon nitride can be controlled,while the carrier separation and transfer ability of carbon nitride is improved.The modified CN with sodium doping and nitrogen defect(SD-CN)demonstrates outstanding H_(2)O_(2)pro-duction performance(H_(2)O_(2)yield rate of 297.2μmol L^(−1)h^(−1))under visible light irradiation,which is approximately 9.8 times higher than that of pristine CN.This work deepens the understanding of the coordinated effect of structural defect and element doping of carbon nitride on the photocatalytic H_(2)O_(2)production performance,and provides new insight into the design of photocatalytic system for efficient production of H_(2)O_(2).

关 键 词：Photocatalysis H_(2)O_(2)evolution Sodium doping Nitrogen defect Metal-free catalyst 

分 类 号：TQ123.6[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]