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    2D/2D nano-hybrids of γ-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation

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    Fulltext not available
    Authors
    Wang, Y.
    Xie, Y.
    Sun, Hongqi
    Xiao, J.
    Cao, H.
    Wang, Shaobin
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, Y. and Xie, Y. and Sun, H. and Xiao, J. and Cao, H. and Wang, S. 2016. 2D/2D nano-hybrids of γ-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation. Journal of Hazardous Materials. 301: pp. 56-64.
    Source Title
    Journal of Hazardous Materials
    DOI
    10.1016/j.jhazmat.2015.08.031
    ISSN
    0304-3894
    School
    School of Chemical and Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/31958
    Collection
    • Curtin Research Publications
    Abstract

    Two-dimensional reduced graphene oxide (2D rGO) was employed as both a shape-directing medium and support to fabricate 2D γ-MnO2/2D rGO nano-hybrids (MnO2/rGO) via a facile hydrothermal route. For the first time, the 2D/2D hybrid materials were used for catalytic ozonation of 4-nitrophenol. The catalytic efficiency of MnO2/rGO was much higher than either MnO2 or rGO only, and rGO was suggested to play the role for promoting electron transfers. Quenching tests using tert-butanol, p-benzoquinone, and sodium azide suggested that the major radicals responsible for 4-nitrophenol degradation and mineralization are O2̄ and 1O2, but not radical dotOH. Reusability tests demonstrated a high stability of the materials in catalytic ozonation with minor Mn leaching below 0.5 ppm. Degradation mechanism, reaction kinetics, reusability and a synergistic effect between catalytic ozonation and coupling peroxymonosulfate (PMS) activation were also discussed.

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