TiO_2纳米管限域Co_3O_4催化剂的光解水制氢性能  

Hydrogen Production of Photo-Catalytic Water Splitting by Using Co_3O_4 Encapsulated Within TiO_2 Nanotubes

作　　者：李新军[1,2,3] 张家峰[1,2,3,4] 杨旭[1,2,3] 廖世军[5] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院可再生能源重点实验室,广东广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广东广州510640 [4]中国科学院大学,北京100049 [5]华南理工大学化学与化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2016年第11期12-18,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金青年科学基金资助项目(21303210)~~

摘　　要：采用真空辅助浸渍法,将硝酸钴浸入TiO2纳米管内,再经400℃焙烧得到Co3O4纳米粒子内嵌于TiO2纳米管的光催化剂.通过X射线衍射、透射电子显微镜、X射线光电子能谱、紫外-可见光谱等测试手段对材料进行表征,并在可见光照射下,通过光解水制氢评估材料的催化性能.实验结果显示,高度分散的Co3O4内嵌于TiO2纳米管内,粒径为3-5 nm.与Co3O4负载于TiO2纳米管外的催化剂相比,管内的Co3O4与TiO2纳米管之间的相互作用增大,其可见光吸收明显增强,可见光分解水制氢性能显著提高.By means of vacuum-assisted impregnation,cobalt nitrate was dipped into TiO2 nanotubes and then calcinated at 400 ℃. Thus,the photo-catalyst of Co3O4 nanoparticles embedded in TiO2 nanotubes（ TNT） was obtained. The material was characterized by means of XRD,TEM,XPS and UV-Vis spectroscopy,and through the hydrogen production of photo-catalytic water splitting,the photo-catalytic activity of the material was evaluated under a visible-light irradiation. Experimental results show that（ 1） highly-dispersed Co3O4 is embedded within TNT,and its size is 3 - 5 nm;（2） as compared with the Co3O4 catalyst supported on the exterior surface of TNT,the Co3O4 catalyst confined within TNT shows an enhanced interaction with TNT; and （3） the Co3O4 catalyst confined within TNT also shows an enhanced visible light absorption,and it increases the hydrogen production of water splitting under the visible light illumination significantly.

关 键 词：二氧化钛纳米管 限域效应 光解水制氢 四氧化三钴 

分 类 号：O643.32[理学—物理化学]