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  • Photoelectrochemical determination of intrinsic kinetics of photoelectrocatalysis processes at {001} faceted anatase TiO2 photoanodes

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    Author(s)
    Sun, Tao
    Wang, Yun
    Al-Mamun, Mohammad
    Zhang, Haimin
    Liu, Porun
    Zhao, Huijun
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Year published
    2015
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    Abstract
    The understanding of the intrinsic degradation kinetics of organic species at the reactive anatase TiO2 (001) surfaces under operational conditions is essential for the development of photoelectrocatalytic treatment of wastewater or polluted air. In this study, the intrinsic degradation kinetics of oxalic acid on the anatase (001) surface is successfully investigated by using a facile photoelectrochemical (PEC) method. A double-layered TiO2 photoanode with mainly anatase {001} facets exposed is purposely designed for the PEC measurements. The results reveal that the adsorption of oxalic acid follows the Langmuir adsorption ...
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    The understanding of the intrinsic degradation kinetics of organic species at the reactive anatase TiO2 (001) surfaces under operational conditions is essential for the development of photoelectrocatalytic treatment of wastewater or polluted air. In this study, the intrinsic degradation kinetics of oxalic acid on the anatase (001) surface is successfully investigated by using a facile photoelectrochemical (PEC) method. A double-layered TiO2 photoanode with mainly anatase {001} facets exposed is purposely designed for the PEC measurements. The results reveal that the adsorption of oxalic acid follows the Langmuir adsorption model within the investigated concentration range. The PEC degradation profile can be fitted by two different first-order kinetic processes. The measured rate constant for the fast degradation processes is five times higher than that of the slow processes. The results confirm that the anatase TiO2 with exposed {001} facets possesses a higher reactivity than that of {101} faceted anatase TiO2.
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    Journal Title
    RSC Advances
    Volume
    5
    Issue
    17
    DOI
    https://doi.org/10.1039/c4ra15336g
    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
    Other chemical sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/99224
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    • Journal articles

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