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Flame Spraying of TiO2 nanoparticles: deposition onto glass substrate

Author(s): M. Dinelli, M. Bonini, A. Giorgetti, F. Casucci, F. Ridi, E. Fratini, N. Baldanzini, P. Citti, P. Baglioni
Paper category : conference
Book title: International RILEM Symposium on Photocatalysis, Environment and Construction Materials - TDP 2007
Editor(s): P. Baglioni and L. Casssar
Print-ISBN: 978-2-35158-056-1
e-ISBN: 978-2-35158-057-8
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 281 - 288
Total Pages: 8
Language: English

Abstract: Flame spraying of colloidal suspensions and/or microemulsions is a new way to prepare nanosized materials as well as thin films of nanoparticles. In this paper, we describe a new way to obtain a TiO2 nanostructured coating starting from a TiO2 colloidal dispersion in cyclohexane. Oleic acid was added as a surfactant in order to stabilize the final organic mixture and to prevent any particle agglomeration. The stable suspension is then introduced into the flame produced by the flame spraying system in the form of aerosol. At this stage, the whole organic content of the suspension is decomposed and the nanoparticles are deposited onto the glass support. The morphology of the deposited film was checked by AFM whereas the photocatalytic activity was confirmed by UV spectroscopy following the phenol oxidation. The obtained nanostructured coating almost preserves the original structure and the purity of the starting nano-powder. This deposition method allows a strict control of the final composition and nano-morphology and could be of great utility in many fields involving the use of photocatalytic and self-cleaning glasses for special application.

Online publication: 2011-07-01
Publication type : full_text
Public price (Euros): 0.00

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