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

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

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

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

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

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

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Published In
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> Nanocomposite Photocatalyst”, Eng. J., vol. 21, no. 1, pp. 81-91, Jan. 2017.
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