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    Topotactic Transformation of Metal-Organic Frameworks to Graphene-Encapsulated Transition-Metal Nitrides as Efficient Fenton-like Catalysts

    Access Status
    Fulltext not available
    Authors
    Li, X.
    Ao, Z.
    Liu, J.
    Sun, Hongqi
    Rykov, A.
    Wang, J.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, X. and Ao, Z. and Liu, J. and Sun, H. and Rykov, A. and Wang, J. 2016. Topotactic Transformation of Metal-Organic Frameworks to Graphene-Encapsulated Transition-Metal Nitrides as Efficient Fenton-like Catalysts. ACS Nano. 10 (12): pp. 11532-11540.
    Source Title
    ACS Nano
    DOI
    10.1021/acsnano.6b07522
    ISSN
    1936-0851
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/38393
    Collection
    • Curtin Research Publications
    Abstract

    Innovation in transition-metal nitride (TMN) preparation is highly desired for realization of various functionalities. Herein, series of graphene-encapsulated TMNs (FexMn6-xCo4-N@C) with well-controlled morphology have been synthesized through topotactic transformation of metal-organic frameworks in an N2 atmosphere. The as-synthesized FexMn6-xCo4-N@C nanodices were systematically characterized and functionalized as Fenton-like catalysts for catalytic bisphenol A (BPA) oxidation by activation of peroxymonosulfate (PMS). The catalytic performance of FexMn6-xCo4-N@C was found to be largely enhanced with increasing Mn content. Theoretical calculations illustrated that the dramatically reduced adsorption energy and facilitated electron transfer for PMS activation catalyzed by Mn4N are the main factors for the excellent activity. Both sulfate and hydroxyl radicals were identified during the PMS activation, and the BPA degradation pathway mainly through hydroxylation, oxidation, and decarboxylation was investigated. Based on the systematic characterization of the catalyst before and after the reaction, the overall PMS activation mechanism over FexMn6-xCo4-N@C was proposed. This study details the insights into versatile TMNs for sustainable remediation by activation of PMS.

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