C_(3)N_(5)基光催化材料研究现状:合成、结构及改性策略  

Synthesis,Structure and Modification of C_(3)N_(5)-Based Photocatalysts——A Short Review

作　　者：雷琬莹 杨鑫鑫 赵亮 吴攀 谭自强 杜易 高智 LEI Wanying;YANG Xinxin;ZHAO Liang;WU Pan;TAN Ziqiang;DU Yi;GAO Zhi(College of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,西安710055

出　　处：《硅酸盐学报》2025年第1期136-147,共12页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51902443);陕西省自然科学基础研究计划一般项目(2024JC-YBQN-0155);陕西省教育厅重点科研计划项目(22JY039)。

摘　　要：半导体光催化能够将可再生的太阳能转化为化学能,是解决能源危机和环境污染的技术之一。C_(3)N_(5)作为一种二维层状聚合物材料,具有优异的可见光吸收能力、较低的电子传输阻力以及良好的化学稳定性。然而,表面活性位点密度偏低和载流子复合率偏高抑制了C_(3)N_(5)的光催化活性,限制了工业化的应用。基于此,首先总结了C_(3)N_(5)的合成与结构,接着详细综述了近年来提升其光催化性能的改性策略:形貌调控、氮空位修饰、元素掺杂、构建异质结等,最后讨论了C_(3)N_(5)材料现阶段的制约点和未来能源转化领域的发展方向。C_(3)N_(5) as a two-dimensional(2D)layered polymer material has great prospects in the field of energy storage due to the excellent light absorption,low electron transfer resistance,and environmental friendliness,etc.However,several drawbacks such as the high charge carrier recombination rate,weak reduction ability and low density of surface reactive sites give rise to a poor photoactivity,restricting the large-scale application.Recent researches focus on the synthesis and the detailed molecular structure of C_(3)N_(5),as well as the various modification strategies to promote the photocatalytic activity.It is thus necessary to provide a general guidance for designing high-efficient C_(3)N_(5) catalyst systems based on the existing results.C_(3)N_(5) is commonly prepared by thermal polymerization method in the presence of organic materials precursors that contains a large amount of nitrogen element like melem hydrazine,3-Amino-1,2,4-Triazole,5-Amino-1h-Tetrazol,etc.C_(3)N_(5)has three structures like triazine-triazole structure,azo structure and terminal triazole structure.The unique structures and bonding types of C_(3)N_(5) endow it with a promising possibilities for photocatalytic applications.Various modification strategies including morphology control,nitrogen vacancy creation,element doping and heterojunction construction in promoting the photocatalytic activity of C_(3)N_(5) are discussed.Morphology control is beneficial to improving the specific surface area and enhancing the density of surface reactive site of C_(3)N_(5).Nitrogen vacancy and element doping favors optimizing the band structure and improving the utilization of solar energy.Heterojunction construction like the Schottky junction,type-Ⅱ,Z-scheme and S-scheme C_(3)N_(5)-based heterojunctions enable the efficient spatial separation of charge carriers and maintain the intense redox capabilities.Summary and prospects C_(3)N_(5) as a two-dimensional(2D)layered polymer material has advantages such as the unique structures,larger amount of nitrogen

关 键 词：富氮氮化碳 光催化性能 合成 结构 改性策略 

分 类 号：TB321[一般工业技术—材料科学与工程]