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    Photocatalytic oxidation of phenolic compounds using zinc oxide and sulphate radicals under artificial solar light

    Access Status
    Fulltext not available
    Authors
    Shukla, Pradeep
    Wang, Shaobin
    Ang, Ming
    Tade, Moses
    Date
    2010
    Type
    Journal Article
    
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    Citation
    Shukla, P. and Wang, S. and Ang, M. and Tade, M. 2010. Photocatalytic oxidation of phenolic compounds using zinc oxide and sulphate radicals under artificial solar light. Separation and Purification Technology. 70 (3): pp. 338-344.
    Source Title
    Separation and Purification Technology
    DOI
    10.1016/j.seppur.2009.10.018
    ISSN
    13835866
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/25915
    Collection
    • Curtin Research Publications
    Abstract

    Photocatalytic degradation of phenolic compounds in aqueous solution was investigated in TiO2/persulphate/UV–vis and ZnO/persulphate/UV–vis light. It is found that ZnO exhibits higher activity than TiO2 in photocatalytic degradation of phenol under simulated solar light. The oxidation of phenol in either ZnO/UV–vis or persulphate/UV–vis system occurs at a similar rate while the degradation will be significantly enhanced with ZnO/persulphate/UV–vis system. The kinetics of phenol oxidation in ZnO/persulphate/UV–vis system follows the first order model. Several parameters influencing the reaction rate were also investigated including power intensity, phenol, ZnO and persulphate concentrations. It is shown that stronger light intensity will increase phenol oxidation. An optimal concentration of ZnO and persulphate will be required for maximum degradation of phenol. For phenol, dichlorophenol and trichlorophenol, photocatalytic activity in ZnO/persulphate/UV–vis shows an order of phenol > dichlorophenol > trichlorophenol.

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