Photocatalytic degradation of methyl orange by CeO2 and Fe-doped CeO2 films under visible light irradiation

Authors

D Channei, Chiang Mai University
B Inceesungvorn, Chiang Mai University
N Wetchakun, Chiang Mai University
S Ukritnukun, University of New South Wales
Andrew Nattestad, University of WollongongFollow
Jun Chen, University of WollongongFollow
S Phanichphant, Chiang Mai University

RIS ID

92560

Publication Details

Channei, D., Inceesungvorn, B., Wetchakun, N., Ukritnukun, S., Nattestad, A., Chen, J. & Phanichphant, S. (2014). Photocatalytic degradation of methyl orange by CeO2 and Fe-doped CeO2 films under visible light irradiation. Scientific Reports, 4 1-7.

Abstract

Undoped CeO2 and 0.50-5.00 mol% Fe-doped CeO2 nanoparticles were prepared by a homogeneous precipitation combined with homogeneous/impreganation method, and applied as photocatalyst films prepared by a doctor blade technique. The superior photocatalytic performances of the Fe-doped CeO2 films, compared with undoped CeO2 films, was ascribed mainly to a decrease in band gap energy and an increase in specific surface area of the material. The presence of Fe3+ as found from XPS analysis, may act as electron acceptor and/or hole donor, facilitating longer lived charge carrier separation in Fe-doped CeO2 films as confirmed by photoluminescence spectroscopy. The 1.50 mol% Fe-doped CeO2 film was found to be the optimal iron doping concentration for MO degradation in this study.