The Effect of Cation Exchange on the Pore Geometry of Zeolite L

15 July 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Zeolites with the LTL framework topology are attractive materials for use in optoelectronics, gas adsorption and as chemical reactors. This is due to their unique, one-dimensional (1D) channel systems which are large enough to act as hosts for organic dye molecules and other guest materials. Here, we use high-resolution X-ray diffraction to show the effect of cation exchange on the pore geometry of LTL-type zeolites. The nature of the exchanging cation is shown to influence the free access diameter, volume and water content of the 12-ring (12R) channel systems. As such, cation exchange can be used to tune the molecular sieving and adsorption properties of LTL-type zeolites. This offers new possibilities for these materials in technologically relevant applications.

Keywords

zeolites
X-ray diffraction
channel dimensions
Rietveld refinement
cation exchange

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