TIO2 POROUS MATERIALS OBTAINED BY SOL-GEL METHOD

TiO2 porous films have been prepared through thermal treatment of gels synthesized by hydrolysis-condensation of tetraethyl orthotitanate. T he structural and textural modifications induced by polymerization at room temperature and by thermal treatment al temperatures between 100 and 700 degrees C have been detected using DTA/TGA, XRD, IR spectrosco py, TEM, specific surface, pore volume and pore size measurements. Uti lization of sol-gel method allows the obtaining of films with preselec ted properties, which can be used in preparation of ceramic membranes, suitable in specific separation processes.