alexa Visible light induced wetting of nanostructured N-F co-doped titania films.
Chemical Engineering

Chemical Engineering

Journal of Advanced Chemical Engineering

Author(s): Kontos AG, Pelaez M, Likodimos V, Vaenas N, Dionysiou DD,

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Abstract Nitrogen and fluorine co-doped TiO(2) films have been prepared by dip coating of a modified titania sol-gel based on a nitrogen precursor and a nonionic fluorosurfactant as pore template and fluorine source. The modified NF-TiO(2) films absorb in the visible spectral range, between 400-510 nm and undergo reversible hydrophilic conversion under visible light to a final contact angle of 8°, in contrast to the UV limited optical response of their undoped anatase TiO(2) analogues. The phenomenon takes place at a rate slower than the corresponding one observed for the UV stimulated superhydrophilic effect. The wetting response of the N-F doped TiO(2) films correlates well with the variation of their optical properties and surface morphological characteristics and most importantly with their photocatalytic activity, rendering these materials very promising for self-cleaning applications under visible light. © The Royal Society of Chemistry and Owner Societies 2011 This article was published in Photochem Photobiol Sci and referenced in Journal of Advanced Chemical Engineering

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