Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/53579
Título: Effect of hydrothermal treatment on structural and photocatalytic properties of TiO2 synthesized by sol-gel method
Autores/as: Pulido Melián, Elisenda 
González Díaz, Oscar Manuel 
Doña Rodríguez, José Miguel 
Colón, G.
Navío, J. A.
Pérez Peña, Jesús 
Clasificación UNESCO: 221001 Catálisis
Palabras clave: TiO2
Photocatalysis
Hydrothermal
Sol-gel
Fecha de publicación: 2012
Editor/a: 0926-860X
Proyectos: Modificación y Optimización de Catalizadores Basados en Materiales Altamente Fotoactivos Para Procesos Fotocatalíticos en Fase Acuosa y Gaseosa. 
Publicación seriada: Applied Catalysis A: General 
Resumen: TiO2 nanoparticles have been prepared by sol–gel precipitation and further hydrothermal treatment. In this way, the effect of the hydrothermal treatment on the structural properties and photocatalytic activity of sol–gel synthesized catalysts has been investigated. These catalysts have been produced by hydrolysis of a mixture of isopropanol–titanium tetraisopropoxide (iPrOH–TiiP). The prepared photocatalysts were characterized by means of X-ray diffraction (XRD), surface area analysis (BET), transmission microscopy (TEM), thermogravimetric analysis (TG), scanning electron microscopy (SEM) analysis, diffuse reflectance, sedimentability analysis and aggregate size study. Besides, the structural evolution with the temperature of the photocatalysts treated or not hydrothermally was studied. It was observed that the calcination produces approaching between the characteristics of both sets of photocatalysts. The photocatalytic activity of the obtained photocatalysts was investigated, using phenol as a model pollutant. The calcination temperature is the most remarkable factor that can affect the ultimate photocatalytic activity of the prepared photocatalysts. However, the hydrothermal treatment previous to calcination led to obtain photocatalysts which exhibit larger photocatalytic activity than their homologous photocatalysts without hydrothermal treatment. The obtained photocatalyst TiO2ht600 exhibits the same photocatalytic activity per surface area than the commercial TiO2 Degussa P25 but with much faster sedimentability.
URI: http://hdl.handle.net/10553/53579
ISSN: 0926-860X
DOI: 10.1016/j.apcata.2011.10.033
Fuente: Applied Catalysis A-General [ISSN 0926-860X], v. 411-412, p. 153-159
Colección:Artículos
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