• Synthesis of Ag$_2$Se–graphene–TiO$_2$ nanocomposite and analysis of photocatalytic activity of CO$_2$ reduction to CH$_3$OH

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    • Keywords


      Graphene; photoreduction CO$_2$; semiconductors; CH$_3$OH; scavenger effect.

    • Abstract


      The present work deals with the development of a new ternary composite, Ag$_2$Se–G–TiO$_2$, using ultrasonic techniques as well as X-ray diffraction (XRD), scanning electron microscopy (SEM), high transmission electron microscopy(HTEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and UV–Vis diffuse reflectance spectra (DRS)analyses. The photocatalytic potential of nanocomposites is examined for CO$_2$ reduction to methanol under ultraviolet(UV) and visible light irradiation. Ag$_2$Se–TiO$_2$ with an optimum loading graphene of 10wt% exhibited the maximumphotoactivity, obtaining a total CH3OH yield of 3.52 $\mu$mol g$^{−1}$ h$^{−1}$ after 48 h. This outstanding photoreduction activity is due to the positive synergistic relation between Ag$_2$Se and graphene components in our heterogeneous system.

    • Author Affiliations



      1. Department of Advanced Materials Science and Engineering, Hanseo University, Seosan 31962, Korea
    • Dates

  • Bulletin of Materials Science | News

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