Adsorptive Properties of Microporous Zro2 Gels
Sing, K. S. W.
Theocharis, Charis R.
SourceStudies in Surface Science and Catalysis
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Nitrogen adsorption studies were carried out on zirconia gels prepared through the agency of ammonium carbonate to zirconyl chloride solutions. The effect of heat treatment and cation uptake on the textural characteristics of such hydrous oxides was investigated. The freshly prepared gels as well as those heat treated at 110°C were found to be microporous. After the uptake of the Co2+ and Ca2+ cations the microporosity prevailed with the development of more extensive surface areas and pore volumes. It is suggested that water plays a key role in stabilizing the microporous textures. Primary and secondary mechanisms of micropore filling seem to take place in most of the gels. © 1993 Kodansha Ltd.