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    Sulfur and nitrogen co-doped graphene for metal-free catalytic oxidation reactions

    Access Status
    Fulltext not available
    Authors
    Duan, X.
    O'Donnell, Kane
    Sun, Hongqi
    Wang, Yuxian
    Wang, Shaobin
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Duan, X. and O'Donnell, K. and Sun, H. and Wang, Y. and Wang, S. 2015. Sulfur and nitrogen co-doped graphene for metal-free catalytic oxidation reactions. Small. 11 (25): pp. 3036-3044.
    Source Title
    Small
    DOI
    10.1002/smll.201403715
    ISSN
    1613-6810
    School
    Department of Physics and Astronomy
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP130101319
    Remarks

    This is the peer reviewed version of the following article: Duan, X. and O'Donnell, K. and Sun, H. and Wang, Y. and Wang, S. 2015. Sulfur and nitrogen co-doped graphene for metal-free catalytic oxidation reactions. Small. 11 (25): pp. 3036-3044, which has been published in final form at 10.1002/smll.201403715. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-828039.html

    URI
    http://hdl.handle.net/20.500.11937/9730
    Collection
    • Curtin Research Publications
    Abstract

    Sulfur and nitrogen co-doped reduced graphene oxide (rGO) is synthesized bya facile method and demonstrated remarkably enhanced activities in metal-free activation of peroxymonosulfate (PMS) for catalytic oxidation of phenol. Based on first-order kinetic model, S–N co-doped rGO (SNG) presents an apparent reaction rate constant of 0.043 ± 0.002 min -1 , which is 86.6, 22.8, 19.7, and 4.5-fold as high as that over graphene oxide (GO), rGO, S-doped rGO (S-rGO), and N-doped rGO(N-rGO), respectively. A variety of characterization techniques and density functional theory calculations are employed to investigate the synergistic effect of sulfur and nitrogen co-doping. Co-doping of rGO at an optimal sulfur loading can effectively break the inertness of carbon systems, activate the sp 2 -hybridized carbon lattice and facilitate the electron transfer from covalent graphene sheets for PMS activation. Moreover, both electron paramagnetic resonance (EPR) spectroscopy and classical quenching tests are employed to investigate the generation and evolution of reactive radicals on the SNG sample for phenol catalytic oxidation. This study presents anovel metal-free catalyst for green remediation of organic pollutants in water.

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