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  • Band-gap engineering of BiOCl with oxygen vacancies for efficient photooxidation properties under visible-light irradiation

    Author(s)
    Cui, Dandan
    Wang, Liang
    Xu, Kang
    Ren, Long
    Wang, Li
    Yu, Youxing
    Du, Yi
    Hao, Weichang
    Griffith University Author(s)
    Wang, Liang
    Year published
    2018
    Metadata
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    Abstract
    It remains a great challenge to understand the role of oxygen vacancies in determining the photooxidation properties of semiconductors under visible-light irradiation. Herein, BiOCl with oxygen vacancies is proposed as an excellent model to study the relationship between oxygen vacancies and photooxidation properties. BiOCl nanosheets with abundant oxygen vacancies are synthesized via a facile solvothermal route. Theoretical and experimental results reveal that after the introduction of oxygen vacancies, a new electron donor level appears in the band gap of BiOCl, extending the absorption from the ultraviolet to the visible ...
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    It remains a great challenge to understand the role of oxygen vacancies in determining the photooxidation properties of semiconductors under visible-light irradiation. Herein, BiOCl with oxygen vacancies is proposed as an excellent model to study the relationship between oxygen vacancies and photooxidation properties. BiOCl nanosheets with abundant oxygen vacancies are synthesized via a facile solvothermal route. Theoretical and experimental results reveal that after the introduction of oxygen vacancies, a new electron donor level appears in the band gap of BiOCl, extending the absorption from the ultraviolet to the visible regime. As expected, BiOCl nanosheets with oxygen vacancies exhibit visible-light-driven photocatalytic activity towards oxygen evolution. In addition, BiOCl with abundant oxygen vacancies exhibits a higher visible-light photocurrent and more efficient photoinduced charge separation and transportation than BiOCl with a small number of oxygen vacancies. The introduction of oxygen vacancies on the surfaces of semiconductors provides a promising way to improve the visible-light photooxidation activity of photocatalysts.
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    Journal Title
    Journal of Materials Chemistry A
    Volume
    6
    Issue
    5
    DOI
    https://doi.org/10.1039/c7ta09897a
    Subject
    Macromolecular and materials chemistry
    Materials engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Energy & Fuels
    Publication URI
    http://hdl.handle.net/10072/399733
    Collection
    • Journal articles

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