Parameters Involved in the Sol-Gel Transition of Titania in Reverse Micelles |
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| Authors: | Nora François Berta Ginzberg Sara A. Bilmes |
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| Affiliation: | (1) Facultad de Ingeniería, Universidad de Buenos Aires, Paseo Colón 850; (, 1043) Buenos Aires, Argentina;(2) INQUIMAE; Departamento de Química Inorgánica, Analítica y Química-física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II; (, 1428) Buenos Aires, Argentina |
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| Abstract: | 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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| Keywords: | titanium dioxide nanoparticles sol-gel |
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