J4 ›› 2010, Vol. 45 ›› Issue (9): 113-116.

• Articles • Previous Articles     Next Articles

Preparation of Al-doping TiO2 and effect of acid  treatment on its photocatalytic activity

ZHANG Guo-qiang, LIU Yan, ZHOU Ai-qiu, XU Xiao-hong*   

  1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China
  • Received:2009-11-17 Online:2010-09-16 Published:2010-10-12

Abstract:

 Anatase phase has a far higher photocatalytic activity than the rutile phase. Al doped TiO2 photocatalysts were prepared by a chemical solution decomposition method and treated with concentrated nitric acid. The samples were characterized by TG-DTA, XRD, FTIR, BET and UV-Vis, and the effects of acid treatment on the photocatalytic activities of the Al doped TiO2 samples were analyzed by degradation of methyl orange. The results suggested that Al-doping could effectively inhibit the phase transformation from anatase to rutile. The specific surface area and photocatalytic activity of Al doped TiO2 were increased by acid treatment. The Al doped TiO2 (Al∶ Ti=1∶ 4) by acid treatment delivered the highest photocatalytic activity, and the degradation ratio of methyl orange was 100% after 60 min.
 

Key words: titania; Al doping; phase transformation; acid treatment; photocatalysis

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