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  • One-Pot Hydrothermal Synthesis of SnO2/BiOBr Heterojunction Photocatalysts for the Efficient Degradation of Organic Pollutants Under Visible Light

    Author(s)
    Liu, Haijin
    Du, Cuiwei
    Li, Meng
    Zhang, Shengsen
    Bai, Haokun
    Yang, Lin
    Zhang, Shanqing
    Griffith University Author(s)
    Zhang, Shanqing
    Year published
    2018
    Metadata
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    Abstract
    The establishment of p–n heterojunction between semiconductors is an effective means to improve the performance of semiconductor photocatalysts. For the first time, we synthesize SnO2/BiOBr heterojunction photocatalysts using a one-step hydrothermal method. Systematic material characterizations suggest that the photocatalysts consist of irregular BiOBr nanosheets with the length about 200 nm and width about 150 nm, and SnO2 nanoparticles are anchored uniformly onto the nanosheets. Most importantly, electrochemical characterizations including transient photocurrent profiles and electrochemical impedance spectra suggest that ...
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    The establishment of p–n heterojunction between semiconductors is an effective means to improve the performance of semiconductor photocatalysts. For the first time, we synthesize SnO2/BiOBr heterojunction photocatalysts using a one-step hydrothermal method. Systematic material characterizations suggest that the photocatalysts consist of irregular BiOBr nanosheets with the length about 200 nm and width about 150 nm, and SnO2 nanoparticles are anchored uniformly onto the nanosheets. Most importantly, electrochemical characterizations including transient photocurrent profiles and electrochemical impedance spectra suggest that SnO2/BiOBr heterojunctions are created, which facilitates the charge separation and transfer efficiency of photogenerated charge carriers. As such, SnO2/BiOBr photocatalysts exhibit remarkable photocatalytic activities in terms of degrading a series of organic pollutants. Radical trapping experiments and electron spin resonance spectra suggest that superoxide radicals (•O2–) and hydroxyl radicals (•OH) are primary medium species running through the photocatalytic degradation process and enhanced photocatalytic performance.
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    Journal Title
    ACS Applied Materials and Interfaces
    Volume
    10
    Issue
    34
    DOI
    https://doi.org/10.1021/acsami.8b09617
    Subject
    Chemical sciences
    Other chemical sciences not elsewhere classified
    Engineering
    Publication URI
    http://hdl.handle.net/10072/382434
    Collection
    • Journal articles

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