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.
- Keggin-type Cu-substituted heteropolyoxometallate;TiO₂;visible photocatalyst;rhodamine B degradation;the sol-gel method
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通讯作者: 陈斌, bchen63@163.com

PW₁₁Cu/TiO₂ Film Photocatalyst: Preparation and Visible Photocatalytic Performance