Nanocrystalline TiO2 based films onto fibers for photocatalytic degradation of organic dye in aqueous solution

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Abstract

Nanocrystalline titania (TiO2) synthesized via sol-gel, by using an alkoxide precursor were deposited ontocommercially available silica and alumina fibers, namely E-Glass and Nextel 650, respectively. Differentprocessing conditions and material preparation parameters, such as amount of TiO2, film composition andannealing temperature were tested in order to obtain nanocrystalline TiO2 with different morphologicaland structural characteristics. The materials were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD), and the Brunauer, Emmett, and Teller (BET) surface area measurements. Thephotocatalytic activity of the obtained coated fibers was investigated by monitoring the degradationof a model molecule, an azo dye (Methyl Red), under UV irradiation in aqueous solution. The detectedphotocatalytic performance of the sol-gel derived nanocrystalline TiO2 was explained on the basis ofmechanism associated to the photocatalytic decomposition of organic molecules using semiconductoroxides and accounted for the structural and morphological characteristics of the TiO2 based coating. Thematerials with the most suited characteristics for photocatalysis were used to scale up the depositiononto a larger sample of fiber and then tested in a photocatalytic reactor. A commercially available TiO2standard material (TiO2 P25 Degussa) was used as reference, in order to ultimately assess the viability ofthe coating process for real application.

Autore Pugliese

Tutti gli autori

  • Panniello A.; Curri L.; Diso D.; Licciulli A.; Locaputo V.; Agostiano A.; Comparelli R.; Mascolo G.

Titolo volume/Rivista

Applied catalysis. B, Environmental

Anno di pubblicazione

2012

ISSN

0926-3373

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Settori ERC

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