Stepwise dehydration of Cd-exchanged levyne: thermal stability and structural modifications.

ABSTRACT: Zeolites show remarkable properties that can be tuned through cation exchange of their original extraframework content. In this respect, the response of the modified zeolite to the heating stimuli, in terms of structural modifications and thermal stability, can drastically change and is, therefore, an important factor to consider. In this study, the dehydration mechanism of a natural levyne previously exchanged with Cd²⁺ has been monitored in situ by single crystal X-ray diffraction. The initial dehydration trend between 50 and 175 °C is similar to that observed for the pristine material, levyne-Ca. The water loss is accompanied by extraframework cation migration within the zeolitic cavities and the unit-cell volume slightly contracts from 3503.8(1) to 3467.8(6) ų. F

SUBMITTER: Cametti G 

PROVIDER: S-EPMC8550444 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature