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  • Synthesis and characterization of N-doped carbonaceous/TiO2 composite photoanodes for visible-light photoelectrocatalytic inactivation of Escherichia coli K-12

    Author(s)
    Nie, Xin
    Li, Guiying
    Wong, Po-Keung
    Zhao, Huijun
    An, Taicheng
    Griffith University Author(s)
    Zhao, Huijun
    Year published
    2014
    Metadata
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    Abstract
    The N-doped carbonaceous/TiO2 composite photoanodes were fabricated by a facile hydrothermal-calcination approach using melamine as a precursor for N-doped carbonaceous species, and Ti foil as titanium source. The results showed that the N-doped carbonaceous materials with various organic functional groups were uniformly deposited onto TiO2, and the hydrothermal temperature had significant effects on the phase of TiO2, element composition, surface morphology and photocatalytic activity of the composite photoanodes. Escherichia coli K-12 was chosen as the model bacterium to evaluate the photoelectrocatalytic activity of the ...
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    The N-doped carbonaceous/TiO2 composite photoanodes were fabricated by a facile hydrothermal-calcination approach using melamine as a precursor for N-doped carbonaceous species, and Ti foil as titanium source. The results showed that the N-doped carbonaceous materials with various organic functional groups were uniformly deposited onto TiO2, and the hydrothermal temperature had significant effects on the phase of TiO2, element composition, surface morphology and photocatalytic activity of the composite photoanodes. Escherichia coli K-12 was chosen as the model bacterium to evaluate the photoelectrocatalytic activity of the composite photoanodes under visible light irradiation. Under a constant potential bias of +1.0 V and a light intensity of 15 mW/cm2, 107 cfu/mL E. coli could be completely inactivated within only 30 min by using the composite photoanodes obtained from 120 àhydrothermal treatment. The high photoelectrocatalytic bactericidal activity of composite photoanodes under visible light irradiation was mainly due to the synergistic effect between N-doped carbonaceous and TiO2 components, benefiting the light absorption and the effective charge separation.
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    Journal Title
    Catalysis Today
    Volume
    230
    DOI
    https://doi.org/10.1016/j.cattod.2013.09.046
    Subject
    Chemical sciences
    Inorganic chemistry not elsewhere classified
    Engineering
    Publication URI
    http://hdl.handle.net/10072/67194
    Collection
    • Journal articles

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