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Synthesis of Transition Metal-Modified Carbon Nitride Polymers for Selective Hydrocarbon Oxidation

Authors

  • Dr. Zhengxin Ding,

    1. International Joint Laboratory, Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002 (China), Fax: (+86) 591 83778608
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  • Xiufang Chen,

    1. International Joint Laboratory, Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002 (China), Fax: (+86) 591 83778608
    2. Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam (Germany)
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  • Prof. Markus Antonietti,

    1. Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam (Germany)
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  • Prof. Xinchen Wang

    Corresponding author
    1. International Joint Laboratory, Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002 (China), Fax: (+86) 591 83778608
    2. Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam (Germany)
    • International Joint Laboratory, Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002 (China), Fax: (+86) 591 83778608
    Search for more papers by this author

Abstract

Modification of graphitic carbon nitride (g-C3N4) photocatalyst with transition metals was achieved with a simple soft-chemical approach using dicyandiamide monomer and metal chloride as precursors, in combination with a thermal-induced polycondensation at 600 °C under nitrogen atmosphere. The resultant organic–inorganic hybrid materials were thoroughly characterized by a variety of techniques, including X-ray diffraction (XRD), UV/Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), N2-sorption, transmission electron microscopy (TEM), photoluminescence (PL), and FTIR. Benzene hydroxylation and styrene epoxidation reactions were employed to evaluate the catalytic/photocatalytic activity of the synthesized g-C3N4-based catalysts. Results showed that Fe- and Cu-modified g-C3N4 were active for the hydroxylation of benzene to phenol using H2O2 under mild conditions. It was also found that g-C3N4 could promote the catalytic epoxidation of styrene using molecular oxygen as the primary oxidant; after modification with Co and Fe, the catalytic performance for styrene epoxidation with O2 could be significantly improved, especially when coupled with visible-light irradiation.

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