Photocatalytic Degradation of Phenol over Highly Visible-Light Active BiOI/TiO<sub>2</sub> Nanocomposite Photocatalyst

Authors

  • Natkritta Boonprakob Uttaradit Rajabhat University
  • Weerasak Chomkitichai Uttaradit Rajabhat University
  • Jiraporn Ketwaraporn Uttaradit Rajabhat University
  • Aimon Wanaek Uttaradit Rajabhat University
  • Burapat Inceesungvorn Chiang Mai University
  • Sukon Phanichphant Chiang Mai University

DOI:

https://doi.org/10.4186/ej.2017.21.1.81

Keywords:

Bismuth oxyiodide, titanium dioxide, nanocomposites, phenol.

Abstract

BiOI/TiO2 nanocomposites were successfully prepared by the two-step method, co-precipitation/solvothermal method. The amount of BiOI in the composites were varied as 0, 5.0, 7.5, 10.0 and 12.5 mol%. XRD results exhibited sharp and narrow diffraction peaks of both BiOI and TiO2 in all composite samples. Morphologies of as-prepared samples consisted of spherical shapes of TiO2 and nanosheets of BiOI. Difuse Reflectance UV-visible (DR-UV-vis) spectra of composites drastically shifted into the visible range and the reduced band gap energies were observed. The composits obviously showed an enhanced phenol degradation of ca. 6 times higher than that of pure BiOI, pure TiO2 and Degussa P25. The maximum photocatalytic activity of ca. 68% was found for 10.0 mol% BiOI/TiO2 nanocomposite because of its increased visible-light-harvesting ability and its efficient electron-hole separation efficiency as observed from DR-UV-vis and PL spectra results.

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Author Biographies

Natkritta Boonprakob

Department of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand

Weerasak Chomkitichai

Department of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand

Jiraporn Ketwaraporn

Department of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand

Aimon Wanaek

Department of Physics, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand

Burapat Inceesungvorn

Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Sukon Phanichphant

Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Published

Vol 21 No 1, Jan 31, 2017

How to Cite

[1]
N. Boonprakob, W. Chomkitichai, J. Ketwaraporn, A. Wanaek, B. Inceesungvorn, and S. Phanichphant, “Photocatalytic Degradation of Phenol over Highly Visible-Light Active BiOI/TiO<sub>2</sub&gt; Nanocomposite Photocatalyst”, Eng. J., vol. 21, no. 1, pp. 81-91, Jan. 2017.

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