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Citation: Wei Zhao-Bin, Xin Qin, . Studies on TiO₂ Distribution over Al₂O₃ by AEM[J]. Acta Physico-Chimica Sinica, ;1990, 6(04): 474-479. doi: 10.3866/PKU.WHXB19900416 shu

Studies on TiO₂ Distribution over Al₂O₃ by AEM

Wei Zhao-Bin ,
Xin Qin ,
,
,
,
,
,

1.
Dalian Institute of Chemical Physics, Academia Sinica; University Catholique de Louvain, Belgium

Received Date: 18 July 1989
Available Online: 15 August 1990

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.
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Studies on TiO₂ Distribution over Al₂O₃ by AEM