Microporous titanate nanofibers for highly efficient UV-protective transparent coating

Hydrothermal treatment of a layered titanate (K 2 Ti 2 O 5 ) in the presence of tetrapropylammonium hydroxide and ammonium fluoride, inspired by a zeolite synthesis method called interzeolite conversion, produced a new titania-based material, a microporous titanate nanofiber. Judging from a variety...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014, Vol.2 (39), p.16381-16388
Main Authors: Hattori, H., Ide, Y., Sano, T.
Format: Article
Language:English
Subjects:
Adsorption
Channels
Coating
Nanofibers
Photocatalysis
Sustainability
Titanates
Titanium dioxide
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Summary:Hydrothermal treatment of a layered titanate (K 2 Ti 2 O 5 ) in the presence of tetrapropylammonium hydroxide and ammonium fluoride, inspired by a zeolite synthesis method called interzeolite conversion, produced a new titania-based material, a microporous titanate nanofiber. Judging from a variety of analyses such as high resolution transmission electron microscopy, Ar adsorption/desorption and adsorption of small and large cations from aqueous solutions, the product had several one-dimensional channels with a width less than 1 nm in a nanofiber. This new material showed a well-restrained photocatalytic activity, which was evaluated by the oxidation of cyclohexane and 2-propanol, and the activity was considerably lower than that of a photocatalytically inactive rutile-type TiO 2 . The material also exhibited an extremely low refractive index (approximately 1.7). Thanks to these unique photoproperties, a microporous titanate nanofiber was successfully embedded in a commodity organic polymer (polycaprolactone) and then used as a highly efficient ultraviolet light (UV) protective transparent coating on a UV-sensitive substrate.
ISSN:2050-7488
2050-7496
DOI:10.1039/C4TA02975E