Abstract
Mesoporous nanotubes consisting of nano-crystalline TiO2 were successfully synthesized through a sol-gel route using a double-templating technique. The tube morphology of TiO2 was obtained with a porous alumina membrane having straight channels of ca. 100 nm in diameter. The mesoporous structure of the tube wall was ascribed to micelles of triblockcopolymers. The samples prepared in straight channels of a porous alumina membrane with a sol-gel route using propanol solutions of titanium tetra-iso-propoxide containing copolymers were a tube having 150 nm diameter and 60 m length. The wall of the tubes consisting of TiO2 nanocrystals contained mesopores of 5-20 nm in diameter.
