Large-pore mesoporous titania-silica thin films (TiO1-xSixO2, 0.1 < x < 0.9) with highly interdispersed mixed oxide frameworks

P.C. ANGELOMÉ; L. ANDRINI; M.C. FUERTES; F.G. REQUEJO; G.J.A.A. SOLER-ILLIA

COMPTES RENDUS CHIMIE

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Año: 2009 vol. 13 p. 256 - 269

1631-0748

Large-size mesoporous thin films with a mixed titania-silica framework and an 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.