Sol-gel derived TiO[sub 2] microemulsion gels and coatings
- Univ. of Patras (Greece)
Microemulsion gels and coatings have been obtained by the sol-gel method using titanium(IV) isopropoxide. Three types of fine water dispersions have been used as the basis sol: reverse Triton X-100 micelles in cyclohexane; quaternary water-in-oil microemulsions containing cyclohexane, 1-pentanol, sodium dodecyl sulfate, and water; and dispersions of water in pentanol in the presence of sodium dodecyl sulfate. Titanium(IV) isopropoxide was dissolved in the continuous phase and hydrolyzed by the dispersed water. Gelation occurred in a few hours in the case of cyclohexane, as the solvent of the continuous phase, and in few days in the case of pentanol. The gelation processes and the obtained microenvironment were probed with fluorescent probes. Films of thickness of the order of a hundred nanometers can be obtained by dipping glass, plastic, or aluminum plates into the solutions at their early stage of gelation. The absorption spectra of the films were characteristic of TiO[sub 2] absorption. X-ray analysis of films heated to 400-500[degree]C revealed a rutile structure. 44 refs., 8 figs., 2 tabs.
- OSTI ID:
- 7166815
- Journal Information:
- Langmuir; (United States), Vol. 10:6; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
14 SOLAR ENERGY
COATINGS
SYNTHESIS
GELS
MICROEMULSIONS
ORGANOMETALLIC COMPOUNDS
HYDROLYSIS
TITANIUM OXIDES
ABSORPTION SPECTRA
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
COMPILED DATA
CYCLOHEXANE
FLUORESCENCE
MICELLAR SYSTEMS
PENTANOLS
SOL-GEL PROCESS
SURFACTANTS
TITANIUM COMPOUNDS
ALCOHOLS
ALKANES
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
COLLOIDS
CYCLOALKANES
DATA
DECOMPOSITION
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
EMULSIONS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
LUMINESCENCE
LYSIS
MICROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SOLVOLYSIS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
400102 - Chemical & Spectral Procedures
400201 - Chemical & Physicochemical Properties
140505 - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)