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Citation: CUI Yu-Min, HONG Wen-Shan, LI Hui-Quan, WU Xing-Cai, FAN Su-Hua, ZHU Liang-Jun. Photocatalytic Degradation and Mechanism of BiOI/Bi2WO6 toward Methyl Orange and Phenol[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 431-441. doi: 10.11862/CJIC.2014.001 shu

Photocatalytic Degradation and Mechanism of BiOI/Bi2WO6 toward Methyl Orange and Phenol

  • 1.

    1 School of Chemistry and Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, China;

  • Corresponding author: LI Hui-Quan, 
  • Received Date: 3 May 2013
    Available Online: 8 October 2013

    Fund Project:

  • BiOI/Bi2WO6 photocatalysts with various BiOIamounts were prepared by a simple deposition method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and low temperature nitrogen adsorption. The photocatalytic performance of BiOI/Bi2WO6 catalysts was evaluated using the photodegradation of methyl orange (MO) and phenol in an aqueous solution under UVand visible light irradiation. The results indicate that compared with commercial Degussa P25 and pure Bi2WO6, the 13.2% BiOI/Bi2WO6 photocatalyst shows much higher UVand visible light photocatalytic performance. The obviously increased photocatalytic activity could be mainly attributed to the effective transfer of the photogenerated electrons and holes at the interface of Bi2WO6 and BiOI, which reduces the recombination of electron-hole pairs. Atransfer process of photogenerated carriers is proposed based on the band structures of BiOIand Bi2WO6. Radical scavengers experiments demonstrate that ·OH, h+, ·O2-and H2O2, especially h+, together dominate the photodegradation process of MOand phenol.
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