 |
 |
|
Doufar, N., Benamira, M., Lahmar, H., Trari, M., Avramova, I. & Caldes, M. T. (2020) Structural and photochemical properties of Fe-doped ZrO2 and their application as photocatalysts with TiO2 for chromate reduction. J. Photochem. Photobiol. A-Chem. 386 UNSP 112105.
Added by: Richard Baschera (2019-11-29 12:41:21) Last edited by: Richard Baschera (2019-11-29 12:42:35) |
| Type de référence: Article DOI: 10.1016/j.jphotochem.2019.112105 Numéro d'identification (ISBN etc.): 1010-6030 Clé BibTeX: Doufar2020 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, MIOPS Mots-clés: Co-Precipitation, coatings, Cr(VI) reduction, kinetics, nanoparticles, optical-properties, oxidation, Oxygen, Photoactivity, pollutants, removal, Solar irradiation, xrd, ZrO2 Créateurs: Avramova, Benamira, Caldes, Doufar, Lahmar, Trari Collection: J. Photochem. Photobiol. A-Chem. |
Consultations : 1/407
Indice de consultation : 5% Indice de popularité : 1.25% |
| Résumé |
|
In this work, we are interested by the photocatalytic activity under sunlight irradiation of Fe-doped ZrO2 prepared by co-precipitation. The structural and photophysical properties of the catalysts have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), BET method and UV-Vis diffuse reflectance. The results show that Fe-doped ZrO2 exhibits higher photocatalytic activity than that of both ZrO2 and commercial TiO2 P25. The best photocatalytic activity is obtained with the 50 mol% Fe-content calcined at 600 degrees C/ 3 h. A total photoreduction of Cr(VI) is achieved within 90 min under solar light with the new hetero-junction Fe-ZrO2/TiO2. The kinetic of Cr(VI) photoreduction is well described by the Langmuir-Hinshelwood (L-H) model which obeys to pseudo-first-order kinetics with a rate constant of 0.031 min(-1). On the basis of the energy band positions of the hetero-junction Fe-ZrO2/TiO2, the detailed reaction mechanism of reduction of inorganic pollutant has been discussed.
|