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  • A honeycomb multilevel structure Bi2O3 with highly efficient catalytic activity driven by bias voltage and oxygen defect

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    Hao522083-Accepted.pdf (1.785Mb)
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    Accepted Manuscript (AM)
    Author(s)
    Chen, Tong
    Hao, Qiang
    Yang, Wenjuan
    Xie, Chenlang
    Chen, Daimei
    Ma, Chao
    Yao, Wenqing
    Zhu, Yongfa
    Griffith University Author(s)
    Hao, Derek
    Year published
    2018
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    Abstract
    In this work, we report a bismuth oxide film electrode with oxygen defects and honeycomb multilevel structure prepared by one-step hydrothermal method. The control of raw materials enables to control the thickness and morphology of BiO electrodes. The photoelectrocatalytic of prepared electrodes were tested in various conditions. Under visible light irradiation (λ ≥ 420 nm) and 3 V bias, the sample BiO-2 has the highest photoelectrocatalytic activity, which is 4.95 times higher than the photocatalytic activity and 9.86 times higher than the electrocatalytic activity. The oxygen defects of bismuth oxide were confirmed by EPR ...
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    In this work, we report a bismuth oxide film electrode with oxygen defects and honeycomb multilevel structure prepared by one-step hydrothermal method. The control of raw materials enables to control the thickness and morphology of BiO electrodes. The photoelectrocatalytic of prepared electrodes were tested in various conditions. Under visible light irradiation (λ ≥ 420 nm) and 3 V bias, the sample BiO-2 has the highest photoelectrocatalytic activity, which is 4.95 times higher than the photocatalytic activity and 9.86 times higher than the electrocatalytic activity. The oxygen defects of bismuth oxide were confirmed by EPR and DFT calculation. The morphology and structure of prepared samples were tested by XRD, scanning electronic microscope (SEM), high-resolution transmission electron microscope (HRTEM) and X-ray photoelectron spectroscopy (XPS). The enhanced photoelectrocatalytic activity is attributed to the proper bias voltage, oxygen defects, and honeycomb multilevel structure. The results of tapping experiments showed that the main active species during the photoelectrocatalytic progress is superoxide radical and the mechanism of the photoelectrocatalysis was proposed.
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    Journal Title
    Applied Catalysis B: Environmental
    Volume
    237
    DOI
    https://doi.org/10.1016/j.apcatb.2018.05.044
    Copyright Statement
    © 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Physical chemistry
    Chemical engineering
    Environmental engineering
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Physical
    Engineering, Environmental
    Publication URI
    http://hdl.handle.net/10072/412063
    Collection
    • Journal articles

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