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    Co3O4–C3N4 p–n nano-heterojunctions for the simultaneous degradation of a mixture of pollutants under solar irradiation

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    Access Status
    Open access
    Authors
    Suyana, P.
    Ganguly, P.
    Nair, Balagopal
    Mohamed, A.
    Warrier, K.
    Hareesh, U.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Suyana, P. and Ganguly, P. and Nair, B. and Mohamed, A. and Warrier, K. and Hareesh, U. 2017. Co3O4–C3N4 p–n nano-heterojunctions for the simultaneous degradation of a mixture of pollutants under solar irradiation. Environmental Science: Nano. 4 (1): pp. 212-221.
    Source Title
    Environmental Science: Nano
    DOI
    10.1039/c6en00410e
    ISSN
    2051-8153
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/50834
    Collection
    • Curtin Research Publications
    Abstract

    Environmental remediation employing sunlight-active semiconductor nano-heterostructures provides effective solutions for handling emerging contaminants through a greener approach. Herein, we report the creation of ultrafine dispersions of Co3O4 nanoparticles in a g-C3N4 matrix by a simple one-pot synthetic strategy involving the co-pyrolysis of constituent raw materials. Calcination of a homogeneous mixture of melamine and cobalt nitrate at 550 °C/2 h leads to the formation of Co3O4-C3N4 p-n nano-heterojunctions that displayed extended absorption in the visible wavelength region owing to the synergistic role of Co3O4 particles. Moreover, the surface area values of the composites reached 90 m2 g-1, a tenfold increase from the value of 8 m2 g-1 obtained for the pristine C3N4. The band bending, induced by the p-n nano-heterojunctions, leads to the formation of intimate interfaces having enhanced photophysical properties. The mass normalized photoluminescence spectra of the heterojunctions indicated reduced exciton recombinations that are validated further by the enhanced sunlight-induced photocatalytic degradation of a mixture of methylene blue and tetracycline organic pollutants.

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