NiFe/氮化碳光催化剂的制备及其性能研究——推荐一个综合化学实验
Preparation and Properties of NiFe/Carbon Nitride Photocatalysts——A Comprehensive Chemistry Experiment is Recommended
刘灿群1
作者信息
- 1. 岭南师范学院 化学化工学院,广东 湛江 524048
- 折叠
摘要
石墨相氮化碳(g-C3N4)作为一种新型的非贵金属可见光催化剂,能够利用太阳能光解水产氢,目前被广泛应用于氢能开发领域中.但是,由于其光吸收能力是有限的、光生电子-空穴也容易复合等缺点导致了光催化性能较低.通过将NiFe/氮化碳制备转化为综合化学实验,介绍了热缩聚法以尿素作为前驱体合成g-C3N4,再采用水热合成法制备NiFe合金,与g-C3N4按照不同比例复合得到NiFe/g-C3N4复合物,采用X射线衍射仪技术(XRD)、能谱仪技术(EDS)手段对其进行表征,并以水、三乙醇胺作为介质,对其产氢性能进行测试.结果表示,复合了一定量合金的g-C3N4的产氢效率有所提高,质量分数为25％的NiFe/g-C3N4复合物的效率最佳,比纯g-C3N4的高84倍.NiFe合金与g-C3N4复合后减弱了光生电子-空穴的复合,增强了光催化活性,通过综合性实验教学的开展,培养了学生的科研和创新能力,促进了学生综合素质的全面发展..
Abstract
Introduce a comprehensive chemical experiment-graphite-phase carbon nitride(g-C3N4),as a new non-noble metal visible light catalyst,can photolysis hydrogen in aquatic products by solar energy,and has been widely used in hydrogen energy development.However,due to its limited light absorption capacity,photogenerated electron-hole recombination and other shortcomings,the photocatalytic performance is low.In this paper,the NiFe/g-C3N4 composite was synthesized by hydrothermal method using urea as precursor,and then NiFe alloy was pre-pared by hydrothermal method,it was characterized by x-ray diffraction(XRD)and energy dispersive spectrometer(EDS),and its hydrogen production was tested by water and triethanolamine.The results show that the hydrogen production efficiency of g-C3N4 compound with a certain amount of alloy is improved,and the efficiency of NiFe/g-C3N4 compound with a mass fraction of 25％is 84 times higher than that of pure g-C3N4.The combination of NiFe alloy with g-C3N4 weakens the photoelectron hole recombination and enhances the photocatalytic activity.
关键词
石墨相氮化碳/NiFe合金/光催化制氢Key words
Graphite Phase Carbon Nitride/NiFe Alloy/Photocatalysis Hydrogen Production引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据