CRCU

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (6): 717-721.

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Effect of Preparation Methods of Bi2O3 Nanoparticles on their Photocatalytic Activity

DING Peng1,2, DU Yao-guo1, XU Zi-li1   

  1. 1. Department of Environment Science, College of Environment and Resources, Jilin University, Changchun 130023, P. R. China;
    2. Department of Chemistry, Changchun Normal College, Changchun 130032, P. R. China
  • Received:2003-11-17 Online:2004-12-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China (No.20277015).

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Abstract: Bi2O3 nanoparticles were prepared by means of ammonia precipitation, polyol mediated methods and microemulsion chemical method. The structure and properties of the as-prepared nanoparticles, having been submitted to a heat-treatment test at 750 ℃, were characterized by means of XRD, BET, XPS and UV-Vis absorption techniques. The photocatalytic oxidation reactions of benzene, toluene and xylene were used as the model reaction to measure the photocatalytic activity of Bi2O3 nanoparticles, respectively. The results show that the crystallite size of Bi2O3 prepared with different methods and calcined at 750 ℃ were 50.6, 38.5 and 31.5 nm, respectively. The photocatalytic activity of Bi2O3 nanoparticles prepared with the microemulsion chemical method was higher than that of the particles prepared with the polyol mediated method; and that of the particles prepared with the micromulsion chemical method was the highest among the three. The degradation rates of the three pollutants xylene, toluene and benzene decreased in sequence.

Key words: Bi2O3, Preparation method, Characterization, Photocatalytic activity