无机材料学报2025，Vol.40Issue(5)：552-560,后插1,封3,11.DOI:10.15541/jim20240345
Na和O元素共掺杂氮化碳高效光催化制氢
Na and O Co-doped Carbon Nitride for Efficient Photocatalytic Hydrogen Evolution
摘要
Abstract
Elemental doping is an effective strategy for tuning the band structure of graphite carbon nitride(CN)to enhance its photocatalytic performance.In this study,sodium(Na)and oxygen(O)co-doped carbon nitride(Na/O-CNx,x=1.0,2.0,3.0,4.0)was synthesized via solid-phase reaction of sodium citrate(NaCA)and pure CN powder in the Teflon-sealed autoclave under air conditions at 180℃.Surface area of Na/O-CN3.0 is measured to be 18.8 m2/g,increasing by 60.7%compared to that of pure CN(11.7 m2/g).Bandgap energy of Na/O-CN3.0 is determined to be 2.68 eV,marginally lower than that of pure CN(2.70 eV),thereby enhancing its capacity for sunlight absorption.Meanwhile,the incorporation of Na and O atoms into Na/O-CNx is found to effectively reduce recombination rates of photogenerated electron-hole pairs.As a result,Na/O-CNx samples exhibit markedly enhanced photocatalytic hydrogen evolution activity under visible light irradiation.Notably,the optimal Na/O-CN3.0 sample achieves a photocatalytic hydrogen production rate of 103.2 μmol·g-1·h-1,which is 8.2 times greater than that of pure CN(11.2 μmol·g-1·h-1).Furthermore,a series of Na/O-CNx-y O2(y=0,20%,40%,60%,80%,100%)samples were prepared by modulating the oxygen content within reaction atmosphere.The catalytic performance evaluations reveal that the incorporation of both Na and O atoms in Na/O-CN3.0 enhances photocatalytic activity.This study also introduces novel methodologies for synthesis of metal atom-doped CN materials at lower temperature,highlighting the synergistic effect of Na and O atoms in photocatalytic hydrogen production of Na/O-CNx samples.关键词
Na和O共掺杂氮化碳/协同效应/可见光/光催化制氢Key words
Na and O co-doped carbon nitride/synergistic effect/visible light/photocatalytic hydrogen evolution分类
化学化工引用本文复制引用
陈莉波,盛盈,伍明,宋季岭,蹇建,宋二红..Na和O元素共掺杂氮化碳高效光催化制氢[J].无机材料学报,2025,40(5):552-560,后插1,封3,11.基金项目
National Natural Science Foundation of China(21806023) （21806023）
Natural Science Foundation of Hunan Province(2021JJ40199) （2021JJ40199）
Education Department Foundation of Hunan Province(20C0813) （20C0813）
Hunan University of Science and Technology Fundamental Research Funds （）
Postgraduate Scientific Research Innovation Project of Hunan Province(CX20240877) （CX20240877）
