Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (21): 2597-2602.DOI: 10.6023/A1102272Z Previous Articles     Next Articles

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  1. (1东北师范大学先进光电子功能材料研究中心 长春130024)
    (2白城师范学院化学系 白城 137000)
  • 投稿日期:2011-02-27 修回日期:2011-04-30 发布日期:2011-07-08
  • 通讯作者: 李跃军
  • 基金资助:


Fabrication and Enhanced Photocatalytic Properties of CeO2/TiO2 Composite Nanofibers

Li Yuejun1,2 Cao Tieping1,2 Wang Changhua1 Shao Changlu*,1   

  1. (1 Centre for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024)
    (2 Department of Chemistry, Baicheng Normal College, Baicheng 137000)
  • Received:2011-02-27 Revised:2011-04-30 Published:2011-07-08

Heterostructured CeO2/TiO2 composite nanofibers were prepared via combination of hydrothermal growth and electrospinning technique. The morphology and structure of CeO2/TiO2 composite nanofibers were characterized by X-ray diffraction (XRD), Raman microscope (Raman), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and Brunauer-Emmett-Teller surface area (BET) analysis. The catalytic properties of the sample were studied via rhodamine B degradation as the model reaction. The results showed that CeO2 nanoparticles could evenly grow on the TiO2 nanofibers surface and thus heterostructured CeO2/TiO2 composite materials were successfully obtained. By selecting different alkaline source, CeO2/TiO2 heterostructures with different morphology of CeO2 nanostructures were facilely fabricated. The CeO2/TiO2 heterostructures showed enhanced photocatalytic efficiency compared with the bare TiO2 nanofibers under UV light irradiation. This is due to the reason that the presence of CeO2 nanostructures on TiO2 nanofibers can increase its surface area, and effectively achieve the separation of photoelectrons and holes, and thus enhancing the systems quantum efficiency. Last, the mechanism for the enhancement of photocatalytic activity of heterostructured nanofibers was discussed.

Key words: CeO2/TiO2 composite nanofiber, electrospinning technique, hydrothermal method, photocatalysis

CLC Number: