Preparation and Mechanism Study of Mesoporous Titania Whiskers

A simple novel procedure for the,synthesis of mesoporous titania whiskers from potassium dititanate(K_2Ti_2O_5)was reported.Nanostructure whisker was obtained via controlling mesostructure transition process of the unstable trigonal bipyramidal layered crystal structure of K_2Ti_2O_5 in a hydra- tion step.XRD,TEM and HREM results confirm the existence of nanophase KOH·nH_2O inside the inorganic framework.Removing of nanophase KOH.nH_2O by acid solution leads to the formation of mesoporous structure with the specific surface area up to 248m~2/g.The mesoporous structure of TiO_2 whiskers and fibrous morphology can be preserved by calcination at 500℃with the specific surface area of 139m~2/g and the pore diameter of 8.7nm.