ISSN:
1572-879X
Schlagwort(e):
zeolite ZnY
;
solid-state ion exchange
;
salt inclusion
;
129Xe NMR spectroscopy
;
adsorption of carbon monoxide and xenon
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Zeolites ZnY with various overall zinc contents were prepared from mixtures of zeolite NH4Y and crystalline zinc chloride by solid-state ion exchange. The obtained materials were investigated with carbon monoxide, xenon, and nitrogen adsorption as well as with 129Xe NMR and XRF spectroscopy. From the results of these measurements, the zinc cation distributions between the different types of cages of the faujasite framework as well as between the crystallographic positions SIII and SII within the large voids (supercages) were quantitatively determined. The concentrations of zinc cations in the supercages of the presently prepared zeolites are considerably higher than in materials obtained from NaY by conventional wet ion exchange using aqueous zinc salt solutions. Experimental evidence is provided for salt inclusion under certain conditions of preparation.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1019009706584
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