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    Photocatalytic degradation of gaseous toluene over ZnAl2O4 prepared by different methods: A comparative study

    Access Status
    Fulltext not available
    Authors
    Li, Xin Yong
    Zhu, Z.
    Zhao, Q.
    Wang, L.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, X.Y. and Zhu, Z. and Zhao, Q. and Wang, L. 2011. Photocatalytic degradation of gaseous toluene over ZnAl2O4 prepared by different methods: A comparative study. Journal of Hazardous Materials. 186 (2-3): pp. 2089-2096.
    Source Title
    Journal of Hazardous Materials
    DOI
    10.1016/j.jhazmat.2010.12.111
    ISSN
    0304-3894
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/7070
    Collection
    • Curtin Research Publications
    Abstract

    The development of a " green" treatment process for typical indoor pollutants such as toluene is greatly desirable. In this study, ZnAl2O4 nanoparticles were prepared via three different routes, i.e., solvothermal, citrate precursor and hydrothermal methods. Their structural properties were systematically investigated by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), energy-dispersive X-ray spectra (EDX), Brunauer-Emmett-Teller (BET), UV-vis diffuse reflectance spectroscopy (DRS), and Fourier transform infrared spectroscopy (FT-IR) techniques. The photo-induced charge separation in the samples was demonstrated by surface photovoltage (SPV) measurement. The photocatalytic performances of the ZnAl2O4 samples and nanostructured TiO2 samples were comparatively studied by the degradation of gaseous toluene under UV lamp irradiation in in situ FTIR reactor. The results indicated that the sample synthesized by facile solvothermal method exhibited about 90% photocatalytic efficiency of toluene. The toluene was mineralized into carbon dioxide and water as the major species. The photocatalytic oxidation of gaseous pollutant over UV-illuminated ZnAl2O4 is a promising technique for air purification. © 2011 Elsevier B.V.

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