Non-Thermal Crystallization of TiO2 Thin Films using Supercritical Carbon Dioxide Modified by Ethanol-Water Mixture.

0494069 - ÚCHP 2019 CZ eng C - Conference Paper (international conference)
Sajfrtová, Marie - Cerhová, Marie - Jandová, Věra - Dřínek, Vladislav - Matějová, L. - Daniš, S.
Non-Thermal Crystallization of TiO2 Thin Films using Supercritical Carbon Dioxide Modified by Ethanol-Water Mixture.
Program. Prague: Czech Society of Chemical Engineering, 2018, s. 35, č. článku D6.6. ISBN N.
[International Congress of Chemical and Process Engineering CHISA 2018 /23./. Prague (CZ), 25.08.2018-29.08.2018]
Institutional support: RVO:67985858
Keywords : ethanol-water mixture * TiO2 thin films * temperature
OECD category: Chemical process engineering

In this work, the scCO2 modified by mixture of water and ethanol was used for a preparation of crystalline and pure nanostructured TiO2 thin films in one step processing. All the experiments were performed over precursor titania thin films prepared by reverse micelles assisted sol-gel method, using hardly removable nonionic surfactant Triton X-114, however, forming uniform nano-domains. The effect of temperature (40-150 °C), pressure (10-30 MPa), modifier composition
(20, 50 and 80 % w/w of water in ethanol) and concentration inscCO2 (5-15 wt. %) and consumed amount of solvent (50-200 g) on microstructure and purity
of TiO2 thin films was thoroughly studied by means of Raman spectroscopy, X-ray diffraction, and contact angle measurements.
Permanent Link: http://hdl.handle.net/11104/0287298