Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (03): 211-216. Previous Articles     Next Articles

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  1. (1河北理工大学化工与生物技术学院 唐山 063009)
    (2中国科学院成都有机化学研究所 成都 610041)
  • 收稿日期:2009-08-08 修回日期:2009-10-17 出版日期:2010-02-14 发布日期:2010-02-20
  • 通讯作者: 崔文权
  • 基金资助:

    唐山市海洋重点实验室(No. 08360204A-3)

Efficiently Photocatalytic Hydrogen Evolution over Ce-doped K2La2Ti3O10 under Visible Light Irradiation

Liu Li1 Cui Wenquan*,1 Liang Yinghua1 Qiu Fali2   

  1. (1 College of Chemical Engineering and Biological Technology, Hebei Polytechnic University, Tangshan 063009)
    (2 Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041)
  • Received:2009-08-08 Revised:2009-10-17 Online:2010-02-14 Published:2010-02-20
  • Contact: CUI Wen-Quan

Ce-doped K2La2Ti3O10 was prepared by a high temperature solid state reaction, and characterized by XRD, UV-Vis DRS, TEM and XPS. The photocatalytic activities of the Ce-doped K2La2Ti3O10 and pure K2La2Ti3O10 catalysts for hydrogen evolution were examined under visible light irradiation. The results showed that the Ce ion entered the crystal lattice of K2La2Ti3O10, and Ce doping resulted in the small size of particle. The Ce-doped K2La2Ti3O10 powder shifted the UV absorption band of K2La2Ti3O10 toward visible light region. According to the investigation of XPS, La and Ti exist mainly in the forms of +3 and +4 valences, respectively. The Ce 3d XPS basically denotes the mixture of Ce4+/3+ oxidation states giving rise to a myriad of peaks. The Ce-doped K2La2Ti3O10 shows a higher activity than K2La2Ti3O10 under visible light irradiation after they were loaded with 2 wt% Pt as co-catalysts. The highest activity was obtained with 0.05 mmol/h when K2La2Ti3O10 doped at 0.5 mol% of Ce ion to La; and after 5 h illumination, the amount of hydrogen production was got to 0.22 mmol, while that value of pure K2La2Ti3O10 was only 0.037 mmol.

Key words: photocatalysis, Ce doping, K2La2Ti3O10, visible light, hydrogen production