Identification of Iron Oxide Species in the Framework of Zeolite-Y by Using EDTA Dissolution and Electron Spin Resonance (ESR) Methods

概要

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Identification of iron oxide species on the framework of zeolite-Y by using EDTA dissolution method and Electron Spin Resonance (ESR) method has been studied. Encapsulation of iron ions in the framework of zeolite was carried out by ion exchange method using ultrasonic cleaner and then followed by dissolution using EDTA solution. The iron ode was determined by using chemical analysis and Electron Spin Resonance (ESR) . From the ESR spectra it was found that encapsulation of iron oxide to the framework of zeolite-Y tends to form two type of iron oxide species, the first type is as Fe<SUB>2</SUB>O<SUB>3</SUB> or FeOOH (iron oxo species) that are located at site SI on the inner surface of sodalite and the second type as polycationic species that is located at site SII on the outer surface of sodalite.
日本イオン交換学会の論文