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    Nickel in hierarchically structured nitrogen-doped graphene for robust and promoted degradation of antibiotics

    Access Status
    Fulltext not available
    Authors
    Kang, J.
    Zhang, H.
    Duan, Xiaoguang
    Sun, Hongqi
    Tan, X.
    Wang, Shaobin
    Date
    2019
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kang, J. and Zhang, H. and Duan, X. and Sun, H. and Tan, X. and Wang, S. 2019. Nickel in hierarchically structured nitrogen-doped graphene for robust and promoted degradation of antibiotics. Journal of Cleaner Production. 218: pp. 202-211.
    Source Title
    Journal of Cleaner Production
    DOI
    10.1016/j.jclepro.2019.01.323
    ISSN
    0959-6526
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150103026
    URI
    http://hdl.handle.net/20.500.11937/74741
    Collection
    • Curtin Research Publications
    Abstract

    Nickel nanoparticles encapsulated in nitrogen-doped porous graphene (Ni@NPG) were synthesized through a one-pot method as a novel material for catalytic activation of persulfate (PS). The Ni@NPG catalysts were evaluated for adsorptive and catalytic removals of antibiotic sulfachloropyridazine (SCP) as an emerging pollutant and were found to exhibit excellent adsorption and catalysis with 100% SCP removal from water in only 30 min. Meanwhile, great stability and reusability can be achieved with satisfactory organic degradation after 4 successive runs. In addition, metal leaching was prohibited from the metal@carbon catalysts due to the protection of carbon walls. The influences of humid acid and inorganic anions (HCO 3- , Cl - , Br - and H 2 PO 4- ) on SCP degradation at various concentrations were further investigated and the present study shows that all these species promoted the SCP degradation at a low concentration whereas an inhibition effect occurred at higher concentrations due to radical quenching. Electron paramagnetic resonance (EPR) and quenching experiments reveal the PS activation mechanism involving generation of SO 4•- , • OH and • O 2- without singlet oxygen. The synergistic effect of radical and nonradical pathways played crucial roles during the SCP oxidation process.

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