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高等学校化学研究 ›› 2013, Vol. 29 ›› Issue (1): 121-125.doi: 10.1007/s40242-013-2143-6

• Articles • 上一篇    下一篇

Effect of Magnetic Carrier NiFe2O4 Nanoparticles on Physicochemical and Catalytic Properties of Magnetically Separable Photocatalyst TiO2/NiFe2O4

XU Shi-hong1, TAN Dong-dong1, BI De-fu1, SHI Peng-hui1, LU Wei2, SHANGGUAN Wen-feng3, MA Chun-yan1   

  1. 1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China;
    2. Beijing General Municipal Engineering Design & Research Institute, Beijing 100082, P. R. China;
    3. Research Center for Combustion and Environment Technology, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
  • 收稿日期:2012-04-09 修回日期:2012-06-27 出版日期:2013-02-01 发布日期:2013-01-23
  • 基金资助:

    Supported by the Shanghai Municipal Natural Science Foundation, China(Nos.11ZR1400400, 11ZR1400800), the Fundamental Research Funds for the Central Universities, China(No.12D11303) and the Shanghai Leading Academic Discipline Project, China(No.B604).

Effect of Magnetic Carrier NiFe2O4 Nanoparticles on Physicochemical and Catalytic Properties of Magnetically Separable Photocatalyst TiO2/NiFe2O4

XU Shi-hong1, TAN Dong-dong1, BI De-fu1, SHI Peng-hui1, LU Wei2, SHANGGUAN Wen-feng3, MA Chun-yan1   

  1. 1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China;
    2. Beijing General Municipal Engineering Design & Research Institute, Beijing 100082, P. R. China;
    3. Research Center for Combustion and Environment Technology, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
  • Received:2012-04-09 Revised:2012-06-27 Online:2013-02-01 Published:2013-01-23
  • Supported by:

    Supported by the Shanghai Municipal Natural Science Foundation, China(Nos.11ZR1400400, 11ZR1400800), the Fundamental Research Funds for the Central Universities, China(No.12D11303) and the Shanghai Leading Academic Discipline Project, China(No.B604).

摘要:

A series of magnetically separable photocatalyst TiO2/NiFe2O4(TN) with different mass ratios of NiFe2O4 to TiO2 was prepared by sol-gel method. The X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM), ultraviolet-visible spectroscopy(UV-Vis), Brunauer-Emmett-Teller(BET) surface analysis and photoluminescence spectroscopy(PL) were used to characterize the photocatalyst TN. The XRD patterns of TN indicate that adulterating a smidgen of NiFe2O4 into TiO2(about 0.1%, mass ratio) can promote the phase transformation of TiO2, however, when the doped amount of NiFe2O4 surpasses 1%, the introduction of NiFe2O4 can inhibit the growth of TiO2 crystal grain and reduce the size of TiO2 crystal grain. The XPS results of TN indicate that some Fe3+ replace Ti4+ of the TiO2 lattice forming Fe―O―Ti bonds. The PL analysis of TN shows that the NiFe2O4 nanoparticles in photocatalyst TN play the role of the effective recombination centre of the photogenerated electrons and holes, leading to the decrease in photocatalytic activity.

关键词: Photocatalyst, TiO2, NiFe2O4, Magnetical separation

Abstract:

A series of magnetically separable photocatalyst TiO2/NiFe2O4(TN) with different mass ratios of NiFe2O4 to TiO2 was prepared by sol-gel method. The X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM), ultraviolet-visible spectroscopy(UV-Vis), Brunauer-Emmett-Teller(BET) surface analysis and photoluminescence spectroscopy(PL) were used to characterize the photocatalyst TN. The XRD patterns of TN indicate that adulterating a smidgen of NiFe2O4 into TiO2(about 0.1%, mass ratio) can promote the phase transformation of TiO2, however, when the doped amount of NiFe2O4 surpasses 1%, the introduction of NiFe2O4 can inhibit the growth of TiO2 crystal grain and reduce the size of TiO2 crystal grain. The XPS results of TN indicate that some Fe3+ replace Ti4+ of the TiO2 lattice forming Fe―O―Ti bonds. The PL analysis of TN shows that the NiFe2O4 nanoparticles in photocatalyst TN play the role of the effective recombination centre of the photogenerated electrons and holes, leading to the decrease in photocatalytic activity.

Key words: Photocatalyst, TiO2, NiFe2O4, Magnetical separation