INVESTIGADORES
SHAM Edgardo Ling
artículos
Título:
Study on Titania Distribution over alúmina by AEM.
Autor/es:
WEI SHAOBIN; XIN QIN; E. L. SHAM; P. GRANGE; B. DELMON
Revista:
ACTA PHYSICO-CHIMICA SINICA
Editorial:
PEKING UNIV PRESS
Referencias:
Año: 1990 vol. 6 p. 474 - 479
ISSN:
1000-6818
Resumen:
TiO_2-Al_2O_3 binary oxides were prepared by precipitation from TiCl_4 solution with aqueous ammonia; impregnation, using evaporation from titanium isoproxide in iso-propanol; and grafting, using reaction of TiCl_4 vapour with OH~- group on Al_2O_3 surface. AEM was used to examine the morphology of TiO_2 on Al_2O_3. The results show that relative homogeneous distribution of TiO_2 on Al_2O_3 could be formed for im-pregnated samples when TiO_2 loading was not beyond one monolayer. A quite homo-geneous coverage of TiO_2 was obtained for grafting samples through anchoring of TiCl_4 molecule on OH~- group of Al_2O_3 surface. As for precipitated samples the distribution of TiO_2 was rather poor. TiO_2 covered only a part of Al_2O_3 surface.
