Fourier transform far-infrared studies on transition metal ion-exchanged zeolites A

Abstract

FT-FIR spectra of xeolites A containing Mn²⁺, Co²⁺, Ni²⁺, Cu⁺ and Zn²⁺ ions were recorded after heat treatment at 573 K in vacuo. The bands were assigned to the vibrations of the cations with respect to the zeolite framework. From obeying the Butler expression it can be inferred that transition metal ions preferably occupy SI sites in zeolite A. Upon adsorption of rare gas and diatomics the bands of the cation vibration diminish and are unspecifically shifted up- and downscale.