Local and Average Structural Changes in Zeolite A upon Ion Exchange

Lisa Price, Ka Ming Leung, Asel Sartbaeva

Research output: Contribution to journalArticle

Abstract

The infamous ‘structure–property relationship’ is a long-standing problem for the design, study and development of novel functional materials. Most conventional characterization methods, including diffraction and crystallography, give us a good description of long-range order within crystalline materials. In recent decades, methods such as Solid State NMR (SS NMR) are more widely used for characterization of crystalline solids, in order to reveal local structure, which could be different from long-range order and sometimes hidden from long-range order probes. In particular for zeolites, this opens a great avenue for characterization through studies of the local environments around Si and Al units within their crystalline frameworks. In this paper, we show that some structural modifications occur after partially exchanging the extraframework Na + ions with monovalent, Li + , K + , Rb + and NH 4+ and divalent, Ca 2+ cations. Solid state NMR is deployed to study the local structure of exchanged materials, while average stricture changes can be observed by powder diffraction (PXRD). To corroborate our findings, we also employ Fourier Transform Infrared spectroscopy (FT-IR), and further characterization of some samples was done using Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray spectroscopy (EDX).
Original languageEnglish
Article number42
JournalMagnetochemistry
Volume3
Issue number4
DOIs
Publication statusPublished - 12 Dec 2017

Cite this

Local and Average Structural Changes in Zeolite A upon Ion Exchange. / Price, Lisa; Leung, Ka Ming; Sartbaeva, Asel.

In: Magnetochemistry, Vol. 3, No. 4, 42, 12.12.2017.

Research output: Contribution to journalArticle

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