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Characterization of methylene blue/TiO2 hybrid thin films prepared by the liquid phase deposition (LPD) method: Application for fabrication of light-activated colorimetric oxygen indicators by David Gutiérrez-Tauste; Xavier Domènech; Nieves Casañ-Pastor; José A. Ayllón is a Materials Science article available to read on EtoBox.

What is Characterization of methylene blue/TiO2 hybrid thin films prepared by the liquid phase deposition (LPD) method: Application for fabrication of light-activated colorimetric oxygen indicators about?

Methylene blue (MB)/TiO 2 hybrid nanocomposite material has been successfully deposited on both bare glass and indium tin oxide (ITO) covered glass by the liquid phase deposition (LPD) technique. LPD method is applied to one-step hybrid dye/TiO 2 deposition. An optimized amount of MB is added to the fluoride titania precursor aqueous solution in order to entrap this dye within the growing thin film of TiO 2 , yielding a MB/TiO 2 nanocomposite material. Stable, well-adhered, intense blue-colored and optically transparent coatings have been obtained. The formation of the material can be explained by electrostatic interaction between negative charge density at the fluorinated surface of TiO 2 and the cationic dye. MB/TiO 2 nanocomposite material has been characterized by ATR-FT-IR, UV-vis spectroscopy, SEM, TEM, grazing angle XRD and cyclic voltammetry (CV). Deposited hybrid films exhibit photochemical activity: MB is photobleached upon UVA irradiation, using triethanolamine (TEOA) as mild sacrificial electron donor. Moreover, light-activated oxygen indicators with high optical transparency and delayed response can also be satisfactory fabricated by spin-coating a solution of TEOA wit

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Author

David Gutiérrez-Tauste; Xavier Domènech; Nieves Casañ-Pastor; José A. Ayllón

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1010-6030)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)