[STUDIES ON TiO2 DISTRIBUTION OVER Al2O3 BY AEM]

TiO2-Al2O3 binary oxides were prepared by precipitation fro TiCl4 solution with aqueous ammonia, impregnation, using evaporation from titanium isoproxide in isopropanol, and grafting, using reaction of TiCl4 vapour with OH- group on Al2O3 mason. AEM was used to examine the morphology of TiO2 on Al2O3. The results show that relative homogeneous distribution of TiO2 on Al2O3 could be formed for impregnated samples when TiO2 loading was not beyond one monolayer. A quite homogeneous coverage of TiO2 was obtained for grafting samples through anchoring of TiCl4 molecule on OH- group of Al2O3 surface, As for p agitated samples the distribution of TiO2 was rather poor, TiO2 covered only a part of Al2O3 surface.