Study of Water,Methanol And Isopropanol Adsorption on The Surface of Titanosilicas of Different Structure

The adsorption of water, methyl and i-propyl alcohol vapours has been studied on the surface of titanosilicas produced by various methods, as well as on the surface of pure silicon and titanium oxides. Based on findings of the studies, it was concluded that the presence on the surface of pyrogenic titanosilicas (TAS) of hydrolytically unstable Si-O-Ti bonds is responsible for their increased adsorption activity towards water molecules. A dissociative adsorption of H₂O on titanosiloxane bridges is accompanied by an appearance of additional groups ≡SiOH and ≡TiOH, which, in turn, become sites of adsorption of subsequent water molecules. This revised version was published online in August 2006 with corrections to the Cover Date.