Abstract
This work describes the first application of FT-Raman spectroscopy to the investigation of solid-state ion exchange. The contact-induced ion exchange between the following zeolites was examined: Li-exchanged zeolite A (Li-A) and zeolite Y (Na-Y), Li-A and zeolite X (Na-X), Li-A and Ca-exchanged zeolite A (Ca-A). The solid-state ion exchange between zeolite Y (Na-Y, NH 4-exchanged Y) and metal salts (LiCl and CaCl 2) was also studied. The results were verified by powder X-ray diffraction. They are also in good agreement with those obtained from other techniques. The study demonstrates that FT-Raman spectroscopy is a useful tool for the study of ion exchange of zeolites in the solid-state.
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