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High capable visible light driven photocatalytic activity of WO3/g-C3N4 hetrostructure catalysts synthesized by a novel one step microwave irradiation route

  • M. Sumathi
  • A. PrakasamEmail author
  • P. M. Anbarasan
Article
  • 11 Downloads

Abstract

In this paper, WO3/graphitic carbon nitride (g-C3N4) composite photocatalyst were successfully synthesized using microwave irradiation method followed by annealing process at 400 °C for 2 h. Powder X-ray diffraction, Raman and transmission electron microscope results suggest that both pure and composite samples showed hexagonal-phase WO3 (JCPDS Card No. 83-950) with particle size around in 30–40 nm. The optical band gap and specific surface area of the g-C3N4/WO3 composites were in the range of 2.55–2.78 eV and 45–87 m2/g, which is confirmed through UV–Vis diffuse reflectance (DRS) and N2 nitrogen absorption–desorption analysis. The photocatalytic activity of the photocatalysts was investigated by degradation of congo-red (CR) and malachite green (MG) under induced visible light irradiation. The results showed that WO3/g-C3N4 nanocomposite with a mass ratio of 1:3 (W1G3) showed the highest photocatalytic activity efficiency (93%) and high stability (only loss 3%) towards CR. The improved photocatalytic activity of the g-C3N4/WO3 composites is due to the synergistic effect of g-C3N4 and WO3 was considered to lead to improved photogenerated carrier separation. A possible degradation mechanism of CR over the g-C3N4/WO3 composite photocatalyst under visible light irradiation was also proposed.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.PG and Research Department of PhysicsThiruvalluvar Government Arts CollegeRasipuramIndia
  2. 2.Nano and Hybrid Materials Laboratory, Department of PhysicsPeriyar UniversitySalemIndia

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