Parameters Involved in the Sol-Gel Transition of Titania in Reverse Micelles

Titania nanoparticles and gels are synthesized in reverse micelles with either an ionic (AOT) or a non-ionic (Triton X-100) surfactant in alkanes with low water contents. Acids were in some cases dissolved in the aqueous phase. Whereas the size of the sol nanoparticles is independent of the micellar...

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Detalles Bibliográficos
Autores principales: François, N., Ginzberg, B., Bilmes, S.A.
Formato: JOUR
Materias:
Nanoparticles
Sol-gel
Titanium dioxide
Density (optical)
Gelation
Micelles
Nanostructured materials
Paraffins
Reaction kinetics
Sol-gels
Surface active agents
Synthesis (chemical)
Ultraviolet spectroscopy
Negative ions
Semiconductor materials
Reverse micelles
Sol-gel transition
Titania
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09280707_v13_n1-3_p341_Francois
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Titania nanoparticles and gels are synthesized in reverse micelles with either an ionic (AOT) or a non-ionic (Triton X-100) surfactant in alkanes with low water contents. Acids were in some cases dissolved in the aqueous phase. Whereas the size of the sol nanoparticles is independent of the micellar composition, the kinetics of the sol-gel transition are not. The gelation time is shorter for the non-ionic surfactant and becomes longer as the acid content in the water increases, and for smaller anions of equal charge.

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