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Enhanced visible-light photocatalytic activity of g-C3N4/TiO2 films

Journal Article


Abstract


  • Enhanced photocatalytic degradation of methylene blue (MB) using graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) catalyst films has been demonstrated in this present work. The g-C3N4/TiO2 composites were prepared by directly heating the mixture of melamine and pre-synthesized TiO2 nanoparticles in Ar gas flow. The g-C3N4 contents in the g-C3N4/TiO2 composites were varied as 0, 20, 50 and 70 wt%. It was found that the visible-light-induced photocatalytic degradation of MB was remarkably increased upon coupling TiO2 with g-C3N4 and the best degradation performance of ∼70% was obtained from 50 wt% g-C3N4 loading content. Results from UV–vis absorption study, Electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy suggest that the improved photoactivity is due to a decrease in band gap energy, an increased light absorption in visible light region and possibly an enhanced electron–hole separation efficiency as a result of effective interfacial electron transfer between TiO2 and g-C3N4 of the g-C3N4/TiO2 composite film. Based on the obtained results, the possible MB degradation mechanism is ascribed mainly to the generation of active species induced by the photogenerated electrons.

Authors


  •   Boonprakob, Natkritta (external author)
  •   Wetchakun, Natda (external author)
  •   Phanichphant, Sukon (external author)
  •   Wexler, David (external author)
  •   Sherrell, Peter C. (external author)
  •   Nattestad, Andrew
  •   Chen, Jun
  •   Inceesungvorn, Burapat (external author)

Publication Date


  • 2014

Citation


  • Boonprakob, N., Wetchakun, N., Phanichphant, S., Wexler, D., Sherrell, P., Nattestad, A., Chen, J. & Inceesungvorn, B. (2014). Enhanced visible-light photocatalytic activity of g-C3N4/TiO2 films. Journal of Colloid and Interface Science, 417 402-409.

Scopus Eid


  • 2-s2.0-84890951590

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/975

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 402

End Page


  • 409

Volume


  • 417

Place Of Publication


  • United States

Abstract


  • Enhanced photocatalytic degradation of methylene blue (MB) using graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) catalyst films has been demonstrated in this present work. The g-C3N4/TiO2 composites were prepared by directly heating the mixture of melamine and pre-synthesized TiO2 nanoparticles in Ar gas flow. The g-C3N4 contents in the g-C3N4/TiO2 composites were varied as 0, 20, 50 and 70 wt%. It was found that the visible-light-induced photocatalytic degradation of MB was remarkably increased upon coupling TiO2 with g-C3N4 and the best degradation performance of ∼70% was obtained from 50 wt% g-C3N4 loading content. Results from UV–vis absorption study, Electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy suggest that the improved photoactivity is due to a decrease in band gap energy, an increased light absorption in visible light region and possibly an enhanced electron–hole separation efficiency as a result of effective interfacial electron transfer between TiO2 and g-C3N4 of the g-C3N4/TiO2 composite film. Based on the obtained results, the possible MB degradation mechanism is ascribed mainly to the generation of active species induced by the photogenerated electrons.

Authors


  •   Boonprakob, Natkritta (external author)
  •   Wetchakun, Natda (external author)
  •   Phanichphant, Sukon (external author)
  •   Wexler, David (external author)
  •   Sherrell, Peter C. (external author)
  •   Nattestad, Andrew
  •   Chen, Jun
  •   Inceesungvorn, Burapat (external author)

Publication Date


  • 2014

Citation


  • Boonprakob, N., Wetchakun, N., Phanichphant, S., Wexler, D., Sherrell, P., Nattestad, A., Chen, J. & Inceesungvorn, B. (2014). Enhanced visible-light photocatalytic activity of g-C3N4/TiO2 films. Journal of Colloid and Interface Science, 417 402-409.

Scopus Eid


  • 2-s2.0-84890951590

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/975

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 402

End Page


  • 409

Volume


  • 417

Place Of Publication


  • United States