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    Evaluation of bias potential enhanced photocatalytic degradation of 4-chlorophenol with TiO2 nanotube fabricated by anodic oxidation method

    Access Status
    Fulltext not available
    Authors
    Wang, N.
    Li, Xin Yong
    Wang, Y.
    Quan, X.
    Chen, G.
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wang, N. and Li, X.Y. and Wang, Y. and Quan, X. and Chen, G. 2009. Evaluation of bias potential enhanced photocatalytic degradation of 4-chlorophenol with TiO2 nanotube fabricated by anodic oxidation method. Chemical Engineering Journal. 146 (1): pp. 30-35.
    Source Title
    Chemical Engineering Journal
    DOI
    10.1016/j.cej.2008.05.025
    ISSN
    1385-8947
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/10737
    Collection
    • Curtin Research Publications
    Abstract

    TiO2 nanotube was fabricated using anodic oxidation method. The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The obtained TiO2 nanotube exhibited increased photoelectrocatalytic (PEC) activities compared to TiO2 film for 4-chlorophenol (4-CP) degradation in aqueous solution. Comparing with electrochemical process (EP), direct photolysis (DP) and photocatalytic (PC), a significant PEC synergetic effect was observed. The factors influencing the degradation of 4-CP by the PEC process including bias potential, pH, initial concentration of 4-CP, UV light intensity and electrolyte concentration were examined. The results revealed that the bias potential played an important role in the degradation of 4-CP and the most efficient degradation of 4-CP was achieved in highly acidic and alkaline medium. Initial concentration of 4-CP was also a significant factor affecting the degradation of 4-CP. Moreover, the degradation rate increased with both UV light intensity and electrolyte concentration increasing. © 2008 Elsevier B.V. All rights reserved.

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