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 studi ed 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 th e studies, it was concluded that the presence on the surface of pyrogenic t itanosilicas (TAS) of hydrolytically unstable Si-O-Ti bonds is responsible for their increased adsorption activity towards water molecules. A dissocia tive adsorption of H2O on titanosiloxane bridges is accompanied by an appea rance of additional groups =SiOH and =TiOH, which, in turn, become sites of adsorption of subsequent water molecules.