Abstract
Separation media based on hierarchically porous titania (TiO(2)) monoliths for high-performance liquid chromatography (HPLC) have been successfully fabricated by the sol-gel process of titanium alkoxide in a mild condition utilizing a chelating agent and mineral salt. The as-gelled TiO(2) monoliths were subjected to a simple solvent exchange process from ethanol (EtOH) to H(2)O followed by drying and calcination. The resultant monolithic TiO(2) columns consist of anatase crystallites with the typical specific surface area of more than 200 m(2)/g. The resultant monolithic TiO(2) column calcined at 200 and 400°C exhibited a good separation performance for organophosphates as well as for polar benzene derivatives in the normal-phase mode.
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