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Citation: ZOU Xiao-Mei, CHEN Qi-Sheng, KE Xiao-Xue, LEI Qin, ZHAO Zi-Ming, LIU Xi-Long, CHEN Yan, HUA Ying-Jie, WANG Chong-Tai. PW11Cu/TiO2 Film Photocatalyst: Preparation and Visible Photocatalytic Performance[J]. Chinese Journal of Inorganic Chemistry, ;2015, 31(10): 2037-2043. doi: 10.11862/CJIC.2015.232 shu

PW11Cu/TiO2 Film Photocatalyst: Preparation and Visible Photocatalytic Performance

  • 1.

    School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China

  • Corresponding author: HUA Ying-Jie,  WANG Chong-Tai, 
  • Received Date: 17 April 2015
    Available Online: 27 June 2015

    Fund Project: 国家自然科学基金(No.21161007) (No.21161007)国家大学生创新训练项目(No.201411658027)资助。 (No.201411658027)

  • A PW11Cu/TiO2 composite film photocatalyst was prepared on the surface of a glass slide via the sol-gel dipping pulling method using tetrabutyl titanate Ti(OC4H9)4 as the precursor of TiO2 and the Keggin type copper substituted heteropolyanion PW11Cu as the visible light active component in this paper. Then the light absorption properties, the chemical composition, the crystal phase and the surface morphology of the as-prepared catalyst were characterized using UV-Vis DRS, IR, XRD, SEM and TEM. Meanwhile, the visible photocatalytic activity of the catalyst was assessed using the photocatalytic degradation of RhB, a model pollutant, as a probe. Influences of the calcination temperature,the PW11Cr dosage and the solution pH on the catalyst activity were also examined. In the end, a recycle test of the catalyst for RhB degradation was employed to evaluate the stability of the catalyst. Experimental results show that the PW11Cu/TiO2 photocatalyst has a good absorption to visible light. The film yielded at low calcination temperature (100℃) is amorphous and crystalline at high calcination temperature (500℃). The former has higher photocatalytic activity, and was employed to degrade RhB with a concentration of 10 μmol·L-1 under the irradiation of 200 W metal halide lamp, the degradation ratio was about 100% at 80 min and the TOC removal was 32% at 4 h. High solution acidity is favorable to enhancement of the photocatalytic activity of the PW11Cu/TiO2 film. Reaching 100% of RhB degradaion only needed 30 min at pH=2.5. The optimal PW11Cu dosage is 3.0 g under the experimental conditions. The photocatalytic activity of the PW11Cu/TiO2 film remains about 90% after 10 times recycles for RhB degradaion.
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