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

作　　者：刘灿群 Liu Canqun(School of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang 524048,China)

机构地区：[1]岭南师范学院化学化工学院,广东湛江524048

出　　处：《云南化工》2024年第4期170-172,192,共4页Yunnan Chemical Technology

摘　　要：石墨相氮化碳(g-C_(3)N_(4))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-C_(3)N_(4),再采用水热合成法制备NiFe合金,与g-C_(3)N_(4)按照不同比例复合得到NiFe/g-C_(3)N_(4)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-C_(3)N_(4)的产氢效率有所提高,质量分数为25%的NiFe/g-C_(3)N_(4)复合物的效率最佳,比纯g-C_(3)N_(4)的高84倍。NiFe合金与g-C_(3)N_(4)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。。Introduce a comprehensive chemical experiment-graphite-phase carbon nitride(g-C_(3)N_(4)),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-C_(3)N_(4)composite was synthesized by hydrothermal method using urea as precursor,and then NiFe alloy was prepared 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-C_(3)N_(4)compound with a certain amount of alloy is improved,and the efficiency of NiFe/g-C_(3)N_(4)compound with a mass fraction of 25%is 84 times higher than that of pure g-C_(3)N_(4).The combination of NiFe alloy with g-C_(3)N_(4)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 

分 类 号：G642[文化科学—高等教育学] O643[文化科学—教育学]