Synthesis of porous few-layer carbon nitride with excellent photocatalytic nitrogen fixation
作者单位：School of Materials Science and EngineeringShandong University of Science and Technology
会议名称：《第七届新型太阳能电池材料科学与技术学术研讨会》
会议日期：2020年
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
关 键 词：Molecular self-assembly g-C3N4 porous structure nitrogen vacancies photocatalytic nitrogen fixation
摘 要：The porous few-layer g-CN(PFL-g-CN) is prepared by a simple molecular self-assembly *** with pure g-CN,the as-prepared PFL-g-CN is ultrathin,the surface is rich in pores,and the photocatalytic nitrogen fixation activity is greatly increased to 8.20 mM h ***-layer and ultrathin nature of PFL-g-CN can provide a larger specific surface area,expose more active sites,and reduce the diffusion path of charges and protons from the inside to the *** addition,the porous structure can narrow the band gap,thereby increasing the light absorption range and enhancing the light absorption ***,the presence of nitrogen vacancies causes PFL-g-CN to move to a more negative conductive band *** importantly,the isotopic experiments using 15 N as nitrogen source confirm the ammonia production originating from N rather than the decomposition of ***,PFL-g-CN can greatly improve the efficiency of visible light photocatalytic nitrogen fixation.