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Raman spectra of zeolites exchanged with uranyl(VI) cations-I. Zeolite Y
Journal article   Peer reviewed

Raman spectra of zeolites exchanged with uranyl(VI) cations-I. Zeolite Y

John R Bartlett and R P Cooney
Spectrochimica Acta Part A: Molecular Spectroscopy, Vol.45(5), pp.541-547
1989
url
https://doi.org/10.1016/0584-8539(89)80004-2View
Published Version

Abstract

Analytical Chemistry Physical Chemistry (incl. Structural) Macromolecular and Materials Chemistry
UO2Y zeolites prepared by various methods have been characterized by Raman spectroscopy. The speciation of [UO2]2+ cations in as-prepared zeolites was found to be determined by hydrolytic reactions occurring at the zeolite-solution interface during ion-exchange, which resulted in the formation of hydroxy-bridged polynuclear complexes in all zeolites investigated. The extent of cation hydrolysis was found to be significantly reduced if the parent NaY zeolites were pretreated in mildly acidic media prior to ion-exchange, and a model for the chemical processes occurring during sample preparation is proposed.

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