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    Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons

    Access Status
    Fulltext not available
    Authors
    Duan, X.
    Sun, Hongqi
    Kang, J.
    Wang, Yuxian
    Indrawirawan, S.
    Wang, Shaobin
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Duan, X. and Sun, H. and Kang, J. and Wang, Y. and Indrawirawan, S. and Wang, S. 2015. Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons. ACS Catalysis. 5: pp. 4629-4636.
    Source Title
    ACS Catalysis
    DOI
    10.1021/acscatal.5b00774
    ISSN
    2155-5435
    School
    Department of Chemical Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP130101319
    URI
    http://hdl.handle.net/20.500.11937/30308
    Collection
    • Curtin Research Publications
    Abstract

    A variety of dimensional-structured nanocarbons were applied for the first time as metal-free catalysts to activate persulfate (PS) for catalytic oxidation of phenolics and dyes as well as their degradation intermediates. Singlewalled carbon nanotubes (SWCNTs), reduced graphene oxide (rGO), and mesoporous carbon (CMK-8) demonstrated superior catalytic activities for heterogeneous PS activation, whereas fullerene (C60), nanodiamonds, and graphitic carbon nitride (g-C3N4) presented low efficiencies. Moreover, the carbocatalysts presented even better catalytic performances than activated carbon and metal oxides, such as Fe3O4, CuO, Co3O4, and MnO2. The activity of prepared rGO-900 was further competing to the most efficient electron donor ofzerovalent iron (ZVI). Both characterization and oxidation results suggested that the catalytic performances of the nanocarbons are determined by the intrinsic atom arrangements of carbon hybridization, pore structure, defective sites, and functional groups (especially the carbonyl groups). Electron paramagnetic resonance (EPR) spectra revealed that carbocatalysts might act as an excellent electron bridge in activation of PS to oxidize adsorbed water directly to generate hydroxyl radicals, distinct from homogeneous and metal-based catalytic activation. This study discovers several efficient nanocarbons for heterogeneous PS activation, and it presents new insights into the catalytic activation processes, providing a fascinating strategy to develop metal-free catalysts for green remediation.

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