Synthesis and Characterization of Expanded Layer-Spacing Zirconium Phosphate by Ion-Exchange and Intercalation Processes
DOI:
https://doi.org/10.18321/ectj42Abstract
In a previous work [1], we prepared О±-Zr(HPO4)2.2H2O (ZrP) by direct precipitation, reflux, and by sol-gel method. The results of characterization indicated that the properties of the resultant ZrP samples depended on the method and conditions of preparation as well as on the nature of precursor used. As an important factor governing the use of such layered phosphates, various modifications were done to enlarge the interlayer spacing of α-ZrP (7.6 А) to be suitable for exchange of large cations. This work aims to modify the interlayer spacing of α-ZrP prepared from zirconium acetylacetonate complex and phosphoric acid. Two routes were used to achieve this goal; the first is by intercalation of acid α-ZrP with n-butyl amine in its vapor-saturated atmosphere. The second route is by performing ion-exchange of the α-ZrP protons by different cations.
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