Photoactivity of Nanostructured TiO2 Catalysts in Aqueous System and their Surface Acid-Base, Bulk and Textural Properties

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Abstract

This work reports on the characterisation and determination of the photocatalytic activityof some TiO2 catalysts prepared using TiCl4 as precursor. The samples, consisting of suspensions,dispersions or powders of nanostructured anatase or rutile phases, were obtained in very mildconditions, i.e., by boiling the solution obtained after hydrolysis of TiCl4 at atmospheric pressure;it is worth noting that no calcination was necessary to obtain photoactive phases. The samples werecharacterised by X-ray diffraction (XRD), determination of the BET specific surface area (SSA),scanning electron microscopy (SEM) observations and diffuse reflectance spectroscopy (DRS). FT-IRspectroscopy was used to study the surface acidity of the solids. Photodegradation of 4-nitrophenoland gemfibrozil (5-(2,5-dimethylphenoxy)-2,2-dimethyl-pentanoic acid) was used as probe reactionsto evaluate the photoactivity and the obtained results showed that the home prepared samples areeffective to degrade both substrates. The photoreactivity results were compared to those obtainedusing commercial photocatalysts.
Lingua originaleEnglish
pagine (da-a)465-479
Numero di pagine15
RivistaResearch on Chemical Intermediates
Volume33
Stato di pubblicazionePublished - 2007

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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