Highly Efficient Visible-Light-Induced Photocatalytic Activity of Fe-Doped TiO<sub>2</sub> Nanoparticles

Authors

  • Paruchai Pongwan Chiang Mai University
  • Burapat Inceesungvorn Chiang Mai University
  • Khatcharin Wetchakun Chiang Mai University
  • Sukon Phanichphant Chiang Mai University
  • Natda Wetchakun Chiang Mai University

DOI:

https://doi.org/10.4186/ej.2012.16.3.143

Keywords:

Nanoparticles, Fe-doped TiO2, photocatalytic activity, modified sol-gel, visible light.

Abstract

Bare TiO2 and nominal 5.0 at% Fe-doped TiO2 nanoparticles were synthesized by the modified sol-gel method. The samples were physically characterized in order to obtain the correlation between structure and photocatalytic properties by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer, Emmett and Teller (BET), and UV-vis diffuse reflectance spectrophotometry (UV-vis DRS). XRD results indicated that phase structures of bare TiO2 and Fe-doped TiO2 nanoparticles were the mixture of anatase and rutile phases. The content of rutile phase in 5.0 at% Fe-doped TiO2 nanoparticles decreased . TEM images revealed that the shape of bare and 5.0 at% Fe-doped TiO2 was almost spherical and the average particle size was in the range of 10-30 nm. Specific surface areas of the samples were found as 75 and 134 m2/g for bare TiO2 and nominal 5.0 at% Fe-doped TiO2, respectively. The results from UV-vis reflectance spectra clearly indicated the shift of absorption band edge towards visible region upon doping TiO2 with iron. Photocatalytic activity of bare TiO2 and 5.0 at% Fe-doped TiO2 nanoparticles was examined by studying the mineralization of oxalic acid under visible light irradiation and the results clearly showed that Fe-doped TiO2 sample exhibited higher activity than bare TiO2.

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Author Biographies

Paruchai Pongwan

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Burapat Inceesungvorn

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

Khatcharin Wetchakun

Nanoscience and Nanotechnology Program, Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand

Sukon Phanichphant

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

Natda Wetchakun

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

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Published In
Vol 16 No 3, Feb 27, 2012
How to Cite
[1]
P. Pongwan, B. Inceesungvorn, K. Wetchakun, S. Phanichphant, and N. Wetchakun, “Highly Efficient Visible-Light-Induced Photocatalytic Activity of Fe-Doped TiO<sub>2</sub> Nanoparticles”, Eng. J., vol. 16, no. 3, pp. 143-152, Feb. 2012.

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