CINDECA 05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
artículos
Título:
Synthesis and characterization of new silica-titania mixed oxides obtained by sol-gel technique
Autor/es:
A. ELIA, P. MARTÍN AISPURO, N. QUARANTA, J. M. MARTÍN-MARTÍNEZ, P. VÁZQUEZ
Revista:
MACROMOLECULAR SYMPOSIA
Editorial:
WISLEY
Referencias:
Lugar: Wisley; Año: 2009
ISSN:
1022-1360
Resumen:
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Although
titanium dioxide has a high surface area, it is not thermally stable and its
surface area decreases strongly at high temperature due to phase transformation
and crystal growth. To improve the thermal stability of titanium dioxide, the
synthesis of mixed oxides can be an elegant approach. In this study different
experimental variables for the synthesis and characterization of new titania-silica
mixed oxides intended to be used as fillers have been proposed. To
manufacture the mixed oxides, different tetraethylortosilicate
(TEOS)/Tetrabutyl orthotitanate (TBTi) mixtures in different ratio, ethanol as
solvent, and acetic acid as catalyst were used via sol-gel synthesis route.
These oxides were characterized by transmission electron microscopy coupled
with EDX analysis (TEM-EDX), optical microscopy, X-ray diffraction, textural
properties, and pH measurements and wettability with liquids of different
polarity.
