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Open AccessArticle

Recent Advances in Low-Temperature Deposition Methods of Transparent, Photocatalytic TiO2 Coatings on Polymers

SCRiPTS, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Gent, Belgium
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Author to whom correspondence should be addressed.
Coatings 2018, 8(4), 131; https://doi.org/10.3390/coatings8040131
Received: 27 February 2018 / Revised: 30 March 2018 / Accepted: 4 April 2018 / Published: 4 April 2018
(This article belongs to the Special Issue Nanostructured Thin Films)
In this paper, we present an overview as well as current advances in the low-temperature deposition of highly crystalline suspensions of titania nanoparticles on polymers for photocatalytic applications. The presence of preformed titania nanoparticles yields the possibility of producing photocatalytically active coatings at reduced temperatures. Transparent and photocatalytically active TiO2 coatings that degrade organic matter, have been widely applied to bestow self-cleaning properties onto surfaces. This low-temperature deposition method and its transition to polymers would open an entire array of possible self-cleaning applications. During this research, incorporation of a silica buffer layer was applied to improve the compatibility of the inorganic coating on a substrate, such as polymethylmethacrylate (PMMA) and polyphenylsulphone (PPSU). The photocatalytic activity of the obtained coating was analyzed for its photocatalytic abilities by evaluating the color removal of a dye solution (methylene blue, MB) under UV irradiation and compared with commercial Pilkington Activ® self-cleaning glass. Our results indicate that the titania-coated silica-polymer systems yield a higher photocatalytic activity towards the degradation of organic pollutants. This method proves that the deposition of highly crystalline anatase suspensions on silica buffer layers is a viable method to produce photocatalytic coatings on heat-sensitive substrates. View Full-Text
Keywords: TiO2; transparent coatings; photocatalysis; low-temperature deposition; polymer substrates; SiO2 buffer TiO2; transparent coatings; photocatalysis; low-temperature deposition; polymer substrates; SiO2 buffer
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Watté, J.; Van Zele, M.; De Buysser, K.; Van Driessche, I. Recent Advances in Low-Temperature Deposition Methods of Transparent, Photocatalytic TiO2 Coatings on Polymers. Coatings 2018, 8, 131.

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