Cupric ion species in Cu(II)-exchanged gallosilicate K-L and comparison with aluminosilicate K-L

Abstract

The locations and adsorbate interactions of Cu(II) in Cu(II)-exchanged gallosilicate with the zeolite L channel structure were investigated by electron spin resonance(ESR) and electron spin echo modulation (ESEM) spectroscopies, and compared with those in Cu(II)-exchanged aluminosilicate K-L zeolite previously studied. Similar results to those in aluminosilicate CuK-L zeolite are observed in its gallium analog, suggesting that gallium substitution has little effect on the interaction of Cu(II) with adsorbates in the L framework structure.