TiO2 纳米管限域Co3O4 催化剂的光解水制氢性能

李新军 张家峰 杨旭 廖世军

doi:10.3969/j.issn.1000-565X.2016.11.003

华南理工大学学报(自然科学版) >

2016 , Vol. 44 >Issue 11: 12 - 18

DOI: https://doi.org/10.3969/j.issn.1000-565X.2016.11.003

化学化工

TiO₂纳米管限域Co₃O₄ 催化剂的光解水制氢性能

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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

李新军( 1967-) ，男，博士，研究员，博士生导师，主要从事环境能源材料研究．

收稿日期: 2016-04-25

修回日期: 2016-05-31

网络出版日期: 2016-10-04

基金资助

国家自然科学基金青年科学基金资助项目( 21303210)

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Hydrogen Production of Photo-Catalytic Water Splitting by Using Co₃O₄ Encapsulated Within TiO₂ Nanotubes

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1.Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China; 2.Key Laboratory of Renewable Energy,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China; 3.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,Guangdong,China; 4.University of Chinese Academy of Sciences,Beijing 100049,China; 5.School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China

李新军( 1967-) ，男，博士，研究员，博士生导师，主要从事环境能源材料研究．

Received date: 2016-04-25

Revised date: 2016-05-31

Online published: 2016-10-04

Supported by

Supported by the National Natural Science Foundation for Young Scholars( 21303210)

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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．

关键词： 二氧化钛纳米管; 限域效应; 光解水制氢; 四氧化三钴

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李新军张家峰杨旭廖世军 . TiO₂纳米管限域Co₃O₄ 催化剂的光解水制氢性能[J]. 华南理工大学学报(自然科学版), 2016 , 44(11) : 12 -18 . DOI: 10.3969/j.issn.1000-565X.2016.11.003

Abstract

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 Co₃O₄catalyst 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.

Key words： titanium dioxide nanotube; confinement effect; hydrogen production of photo-catalytic water splitting; cobaltosic oxide

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