Photocatalytic degradation of orange II by titania addition to sol-gel glasses
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Otros documentos de la autoría: Gargori, Carina; Galindo Llorach, Roberto; Monrós, Guillermo; Badenes March, José Antonio
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comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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Título
Photocatalytic degradation of orange II by titania addition to sol-gel glassesFecha de publicación
2009Editor
Springer VerlagISSN
0928-0707Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Glasses with SiO2-CaO-ZnO-B2O3-K2O-Al2O3 composition modified by addition of
titania (3, 5, 12 and 20% w) have been prepared by sol-gel method. The obtained gels
were aged, dried and fired at 600ºC/1h in order to ... [+]
Glasses with SiO2-CaO-ZnO-B2O3-K2O-Al2O3 composition modified by addition of
titania (3, 5, 12 and 20% w) have been prepared by sol-gel method. The obtained gels
were aged, dried and fired at 600ºC/1h in order to stabilise the glass. The resulting fired
powders were characterised by UV-Vis-NIR spectroscopy, scanning electron
microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction
(XRD). Their photocatalytic capacity on the degradation of orange II dye has been
studied. The XRD and TEM results indicate that system is amorphous with a
nanostructured microstructure. From UV-Vis-NIR results the band gap calculated is
around 3.5 eV for all samples. Photoactivity of powders depends on amount of titania in
glass composition and the surface area of prepared samples. The sample with highest
surface area and lowest addition of titania (3% w. sample) shows similar activity than
commercial anatase used as reference. [-]
Publicado en
Journal of Sol-Gel Science and Technology, 2009, vol. 50, no. 3Derechos de acceso
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