Large-pore mesoporous titania-silica thin films (Ti1-xSixO2, 0.1 ≤ x ≤ 0.9) with highly interdispersed mixed oxide frameworks

Large-size mesoporous thin films with a mixed titania-silica framework and an Im over(3, -) m cubic-derived or worm-like mesostructure were obtained by combining sol-gel and macromolecular templating techniques. These materials presented accessible mesopores (20 to 25% pore volume), tunable refracti...

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Detalles Bibliográficos
Autores principales: Angelomé, P.C., Andrini, L., Fuertes, M.C., Requejo, F.G., Soler-Illia, G.J.A.A.
Formato: JOUR
Materias:
Catalysis
Mesoporous films
Mixed oxides
Self-assembly
Sol-gel
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_16310748_v13_n1-2_p256_Angelome
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Large-size mesoporous thin films with a mixed titania-silica framework and an Im over(3, -) m cubic-derived or worm-like mesostructure were obtained by combining sol-gel and macromolecular templating techniques. These materials presented accessible mesopores (20 to 25% pore volume), tunable refractive index and high molecular-scale mixing of both ions, as demonstrated by UV-Visible, FTIR and XANES spectroscopy. In addition, a composition effect in the catalytic reduction of silver was found, which permitted one to obtain homogeneous metal nanoparticle-mesoporous film nanocomposites with tuned plasmon position. © 2009 Académie des sciences.

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