From layered zirconium phosphates and phosphonates to nanofillers for ionomeric membranes

ABSTRACTA.c. conductivity of a novel large-pore alumina-pillared zirconium phosphate and some lithium ion exchanged samples have been measured by an impedance method. These materials have a conductivity in the range 10-5 to 10-9 Ω-1cm-1 higher than those of alumina-pillared tin phosphate and its lithium derivatives. The electrical behaviour of the pillared zirconium phosphates fits to an equivalent circuit composed by two subcircuits in parallel with a condenser. In a temperature interval (200-500°C), lithium ions are charge carriers and the conductivity increases when heating with activation energies between 0.99 and 1.22 eV.

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Zirconium phosphates deposited on the granulated silica gel as adsorbents for the extraction of cesium, strontium radioisotope ions

Separation Science and Technology ◽

10.1080/01496395.2021.1934024 ◽

2021 ◽

pp. 1-12

Author(s):

Zhuravlev I.Z. ◽

Kovtun M. F. ◽

Botsman A.V.

Keyword(s):

Silica Gel ◽

Zirconium Phosphates

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The mechanism of ion-exchange in some crystalline sodium and caesium zirconium phosphates

Journal of Inorganic and Nuclear Chemistry ◽

10.1016/0022-1902(79)80215-8 ◽

1979 ◽

Vol 41 (10) ◽

pp. 1479-1481 ◽

Cited By ~ 8

Author(s):

A. Dyer ◽

A.M. Yusof

Keyword(s):

Ion Exchange ◽

Zirconium Phosphates

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Formation and Reactivity of Cu Particles on the Surface of Mixed Copper-Zirconium Phosphate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.670.76 ◽

2015 ◽

Vol 670 ◽

pp. 76-81

Author(s):

Nataliya V. Dorofeeva ◽

Olga V. Vodyankina ◽

Grigory V. Mamontov ◽

Vladimir I. Zaykovskii

Keyword(s):

Temperature Increase ◽

Zirconium Phosphate ◽

Phase Evolution ◽

Temperature Treatment ◽

Treatment Temperature ◽

Zirconium Phosphates

Phase evolution of copper-containing zirconium phosphates during the temperature treatment up to 900 °C and formation of active Cu0 particles on the surface of these materials in H2/Ar flow were studied. The materials were characterized by XRD, TEM, TPR-H2 at different steps of treatment. Temperature increase up to 900 °C led to removal of oxygen from the CuZr4P6O24 structure with formation of Cu+-containing compounds. Materials treated by H2-containing flow at 600 °C contained Cu0 particles with sizes from 2 nm to 1 μm. Mixed copper-zirconium phosphate was shown to adsorb CO above 80 °C, while pre-reduced materials adsorbed it starting from 30 °C with formation of CO2 above 100 °C.

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