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Sodium Ion Exchange on Crystalline Zirconium Titanium Phosphate

1979; Oxford University Press; Volume: 52; Issue: 10 Linguagem: Inglês

10.1246/bcsj.52.2923

1348-0634

Yutaka Yazawa, Toru Eguchi, Kazunori Takaguchi, Isao Tomita,

MXene and MAX Phase Materials

Abstract A new ion exchanger, crystalline zirconium titanium phosphate with variable zirconium to titanium mole ratios has been prepared and the sodium ion exchange behavior studied. In the zirconium-rich exchanger a half-exchanged monosodium phase was produced. This differs from the titanium-rich exchanger where a disodium phase was formed without formation of the intermediate monosodium phase. The pH titration curves were complicated but a trend emerged with variation in the Zr/Ti ratio. On the basis of the X-ray evidence and the shapes of the titration curves it is thought that the synthesized phosphates are solid solutions rather than a mechanical mixture of the two metal phosphates.