Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (11): 12-18.doi: 10.3969/j.issn.1000-565X.2016.11.003

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

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

LI Xin-jun1,2,3 ZHANG Jia-feng1,2,3,4 YANG Xu1,2,3 LIAO Shi-jun5   

  1. 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
  • Received:2016-04-25 Revised:2016-05-31 Online:2016-11-25 Published:2016-10-04
  • Contact: 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． E-mail:lixj@ms.giec.ac.cn
  • About author: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．
  • Supported by:
    Supported by the National Natural Science Foundation for Young Scholars( 21303210)

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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 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.

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

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