Ag2Se-Graphene/TiO2 Nanocomposites, Sonochemical Synthesis and Enhanced Photocatalytic Properties Under Visible Light

  • Meng Z
  • Zhu L
  • Ghosh T
 et al. 
  • 14

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Abstract

Ag2Se-Graphene/TiO2 composite was synthesized by a facile sonochemical method. The as-prepared products were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectrophotometer. During the reaction, both of the reduction of graphene oxide and loading of Ag2Se and TiO2 particles were achieved. The as-prepared Ag2Se-Graphene/TiO2 composites possessed great adsorptivity of dyes, extended light absorption range, and efficient charge separation properties simultaneously. Hence, in the photodegradation of rhodamine B (Rh.B), a significant enhancement in the reaction rate was observed with Ag2Se-Graphene/TiO2 composites, compared to the pure TiO2. The high activity can be attributed to the synergetic effects of high charge mobility, and red shift in absorption edge of Ag2Se-Graphene/TiO2 composites.

Author-supplied keywords

  • ag2se
  • composites
  • decomposition
  • energy
  • graphene
  • graphene-oxide
  • nanoparticles
  • photodegradation
  • reduction
  • rhodamine b
  • sensitized solar-cells
  • tio2
  • tio2-graphene nanocomposites
  • uv-vis absorption spectra
  • visible light

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Authors

  • Z D Meng

  • L Zhu

  • T Ghosh

  • C Y Park

  • K Ullah

  • V Nikam

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