Self-cleaning properties of TiO2/palygorskite and TiO2/halloysite nanocomposite coatings

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Panagiotaras, Dionisios, Kaplani, Eleni ORCID: https://orcid.org/0000-0002-4987-4388, Stathatos, Elias and Papoulis, Dimitrios (2014) Self-cleaning properties of TiO2/palygorskite and TiO2/halloysite nanocomposite coatings. In: AIP Conference Proceedings. UNSPECIFIED, GRC, pp. 362-365.

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Abstract

Tubular halloysite and microfibrous palygorskite clay mineral combined with nanocrystalline TiO 2 are involved in the preparation of nanocomposite films on glass substrates via sol-gel route at 450°C. The synthesis employing nonionic surfactant molecule as pore directing agent along with the acetic acid-based sol-gel route without addition of water molecules. Drying and thermal treatment of composite films ensure elimination of organic material lead to the formation of TiO 2 nanoparticles homogeneously distributed on the palygorskite and halloysite surfaces. Nanocomposite films without cracks of active anatase crystal phase on palygorskite and halloysite surfaces are characterized by microscopy techniques, UV-Vis spectroscopy, and porosimetry methods in order to examine their structural properties. The composite palygorskite- TiO 2 and halloysite/ TiO 2 films with variable quantities of palygorskite and halloysite were tested as photocatalysts in the photo-oxidation of Basic Blue 41 azo dye in water. These nanocomposite films proved to be most promising photocatalysts and highly effective to dye’s decoloration in spite of small amount of palygorskite/ TiO 2 or halloysite/ TiO 2 catalyst immobilized onto glass substrates.

Item Type: Book Section
Faculty \ School: Faculty of Science > School of Mathematics
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Depositing User: Pure Connector
Date Deposited: 11 Nov 2015 12:01
Last Modified: 21 Oct 2022 23:50
URI: https://ueaeprints.uea.ac.uk/id/eprint/55100
DOI: 10.1063/1.4897748

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