Characterization of a TiCl4-modified silica surface by means of quantitative surface analysis

Abstract

The reaction of TiCl₄ with the surface of a silica gel has been investigated in detail using Fourier-transform IR photoacoustic spectroscopy (FTIR PAS) and elemental analysis. The hydroxy groups on the silica react with the TiCl₄ giving rise to both monodentate and didentate surface groups. The parameters influencing the relative distribution of these groups have been studied. A quantitative description of the chemisorbed species has been obtained as a function of the pretreatment and the reaction temperatures.