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A sonochemical route to fabricate the novel porous F, Ce-codoped TiO sub(2) photocatalyst with efficient photocatalytic performance
Ist Teil von
Journal of porous materials, 2012-10, Vol.19 (5), p.903-911
Erscheinungsjahr
2012
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
A novel F, Ce-codoped TiO sub(2) photocatalyst with mesoporous structure was successfully fabricated by ultrasound irradiation. The obtained catalysts were characterized by X-ray diffraction, Fourier transform infrared spectrum, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectra, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, photoluminescence spectroscopy, and N sub(2) adsorption. The photocatalytic activity of the samples was evaluated by degradation of acid orange II under UV light irradiation. Results showed that F and Ce can be successfully doped into TiO sub(2) under ultrasonic irradiation conditions. All the single F or Ce-doped TiO sub(2) and F, Ce-codoped TiO sub(2) have shown good mesoporous structures, and this can be contributed to the ultrasound-induced aggregation effect. The F, Ce-codoped TiO sub(2) photocatalyst exhibits much higher photocatalytic activity than that of pure, single F or Ce-doped TiO sub(2), which could be attributed to that F, Ce-codoping increases its surface hydroxyl groups and effectively reduces the photo-generated electron/hole pair recombination rate.