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  • Mesoporous Au@ZnO flower-like nanostructure for enhanced formaldehyde sensing performance

    Author(s)
    Liu, Di
    Wan, Jiawei
    Wang, Hong
    Pang, Gangsheng
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2019
    Metadata
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    Abstract
    The Au@ZnO flower-like nanostructure was successfully prepared by the facile hydrothermal method, and its gas-sensing property was studied. The produced Au@ZnO nanostructure presented an average diameter size of 170 ± 17 nm, and displayed an embedding structure with Au nanoparticle (average diameter size of 32 ± 6 nm) inside and a mesoporous ZnO layer outside. Impressively, the Au@ZnO flower-like nanostructure exhibited high sensitivity and remarkable selectivity toward HCHO, when it was applied for gas sensor. Compared with bare ZnO nanoparticles, the response value of the Au@ZnO nanoparticles toward 100 ppm HCHO at 220 °C ...
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    The Au@ZnO flower-like nanostructure was successfully prepared by the facile hydrothermal method, and its gas-sensing property was studied. The produced Au@ZnO nanostructure presented an average diameter size of 170 ± 17 nm, and displayed an embedding structure with Au nanoparticle (average diameter size of 32 ± 6 nm) inside and a mesoporous ZnO layer outside. Impressively, the Au@ZnO flower-like nanostructure exhibited high sensitivity and remarkable selectivity toward HCHO, when it was applied for gas sensor. Compared with bare ZnO nanoparticles, the response value of the Au@ZnO nanoparticles toward 100 ppm HCHO at 220 °C is more than five times higher (45.28 vs. 8.86). The detailed investigations revealed that the Au nanoparticles inside contributed to the formation of Schottky barrier, which enhanced the sensitivity toward HCHO.
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    Journal Title
    Inorganic Chemistry Communications
    Volume
    102
    DOI
    https://doi.org/10.1016/j.inoche.2019.02.031
    Subject
    Inorganic chemistry
    Other chemical sciences
    Publication URI
    http://hdl.handle.net/10072/386176
    Collection
    • Journal articles

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