Issue 27, 2014

Ship-in-bottle synthesis of the mixed-layered compounds of clay silicate/zirconium phosphate

Abstract

An attempt was made to synthesize artificial mixed-layered compounds between montmorillonite silicate and α-zirconium phosphate using a ship-in-bottle approach. The interlayer cations of montmorillonite were first exchanged with hydroxy-zirconium oligomeric cations, which were then subjected to a reaction with phosphoric acid or phenylphosphoric acid to develop α-zirconium phosphate layers (Zr(R–OPO3)2; R = H, C6H5) between the clay silicate layers. The attempt of the reaction with phosphoric acid failed; hydroxy-zirconium cations were removed out of the interlayer space, forming α-zirconium phosphate outside of montmorillonite. The phenylphosphate derivative, montmorillonite/Zr(C6H5OPO3)2, with a regular mixed-layered structure has been successfully obtained, showing a basal spacing corresponding to the sum of the thicknesses of the individual layers. When a polyvinyl alcohol (PVA) aqueous solution was used in the preparation of the hydroxy-zirconium exchanged montmorillonite, PVA was incorporated with hydroxy-zirconium complex cations between the silicate layers. The resulting compound can adsorb phosphate ions. Although this is not a mixed-layered compound in the context of this study, the selective and reversible phosphate ion exchange properties are worth noting for future study.

Graphical abstract: Ship-in-bottle synthesis of the mixed-layered compounds of clay silicate/zirconium phosphate

Supplementary files

Article information

Article type
Paper
Submitted
17 apr 2014
Accepted
12 mei 2014
First published
13 mei 2014

Dalton Trans., 2014,43, 10642-10650

Ship-in-bottle synthesis of the mixed-layered compounds of clay silicate/zirconium phosphate

H. Kawagoe, N. Imo-oka, H. Shinohara and S. Yamanaka, Dalton Trans., 2014, 43, 10642 DOI: 10.1039/C4DT01126K

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