Chinese Journal of Applied Chemistry

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Synthesis, Characterization and Synergistic Effect of Tb-loaded Mesoporous Titanium Dioxide

CHEN Qi, FEI Xia, HE Qinqin, WU Qiliang, HE Bing, LIU Xueting*   

  1. (School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)
  • Received:2013-11-15 Revised:2014-05-23 Published:2014-09-04 Online:2014-09-04

Abstract: Using block copolymer P123 as the template, Tb(terbium)-loaded mesoporous TiO2 photocatalysts were prepared by the evaporation induced self-assembly method and characterized by X-ray diffraction(XRD), N2 adsorption-desorption and ultraviolet-visible(UV-Vis) absorbance spectroscopy. Tb-loaded mesoporous TiO2 with a mixture of anatase and rutile phases exhibits a high photocatalytic activity for degradation of rhodamine B(RhB) under the irradiation of visible light. It is found that 0.7% loading of Tb and 380 ℃ calcination temperature are the most appropriate preparation conditions for achieving high photocatalytic performance. The synergistic effect of high specific surface area, small crystallite size of mesoporous TiO2, Tb-induced charge-eparation and increase of visible light absorption has improved the photocatalytic activity. The mechanism of enhancement of photocatalysis in Tb loaded TiO2 is proposed.

Key words: mesoporous titanium dioxide, Tb-loaded, synergistic effect

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