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  • Visible light photoelectrochemical properties of a hydrogenated TiO2 nanorod film and its application in the detection of chemical oxygen demand

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    Accepted Manuscript (AM)
    Author(s)
    Wang, Xiujie
    Zhang, Shengsen
    Wang, Hongjuan
    Yu, Hao
    Wang, Haihui
    Zhang, Shanqing
    Peng, Feng
    Griffith University Author(s)
    Zhang, Shanqing
    Year published
    2015
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    Abstract
    A series of TiO2 nanorod array electrodes with different lengths have been successfully fabricated by a controlled hydrothermal method for photoelectrochemical (PEC) application. In order to enhance the conductivity of the TiO2 nanorods and enable the PEC activity under visible light irradiation, the TiO2 nanorod samples have been further hydrogenated. The influence of the length of the hydrogenated TiO2 nanorod arrays (H-TNRs) on their visible-light-driven photoelectrocatalytic activity was investigated. With increasing the length of the H-TNRs to about 3.0 μm, the activity was close to the maximum. Subsequently, the H-TNRs ...
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    A series of TiO2 nanorod array electrodes with different lengths have been successfully fabricated by a controlled hydrothermal method for photoelectrochemical (PEC) application. In order to enhance the conductivity of the TiO2 nanorods and enable the PEC activity under visible light irradiation, the TiO2 nanorod samples have been further hydrogenated. The influence of the length of the hydrogenated TiO2 nanorod arrays (H-TNRs) on their visible-light-driven photoelectrocatalytic activity was investigated. With increasing the length of the H-TNRs to about 3.0 μm, the activity was close to the maximum. Subsequently, the H-TNRs photoanode was fitted into a thin-layer photoelectrochemical cell for mineralization of organic compounds. The visible light PEC performance was enhanced so much that chemical oxygen demand (COD) detection was achieved under visible light as the light source for the first time. The excellent relationship between the photoelectrochemical COD and conventional COD values within the range of 0–288 mg L−1 suggests that the simple visible light driven PEC method is a promising alternative to the conventional COD method.
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    Journal Title
    RSC Advances
    Volume
    5
    Issue
    93
    DOI
    https://doi.org/10.1039/c5ra15923g
    Copyright Statement
    © 2015 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
    Subject
    Chemical sciences
    Optical properties of materials
    Publication URI
    http://hdl.handle.net/10072/101526
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