Preparation and structural characterization of disordered Na-gallosilicate zeolite with natrolite framework and its K+ and NH4+ exchanged analogues

Manjusha J. Gavhane, R. K. Jha, Kyung Wan Nam, Deu S. Bhange

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We report first time preparation and crystal structure of NH4+ exchanged form of highly disordered gallosilicate zeolite with natrolite framework (NAT) by ion exchange method from K-gallosilicate zeolite with natrolite framework. K+ exchanged form was obtained by ion exchange with hydrothermally prepared highly disordered sodium gallosilicate zeolite with natrolite framework. Phase purity, degree of ion exchange, particle morphology, elemental mapping and thermal behaviour of Na-, K-, NH4-gallosilicate zeolites were investigated using various instrumental techniques. Crystal structures of Na-, K-, NH4-gallosilicate zeolites were obtained by Rietveld analysis of powder X-ray diffraction data collected using synchrotron source of X-rays. Refined structural models of hydrated Na-, K-, NH4-gallosilicate zeolites were compared. NH4-gallosilicate zeolite was calcined at 450 °C to obtain its H-form. The structure collapse of H-gallosilicate zeolite with natrolite framework is commented finally based on the structural characterization data.

Original languageEnglish
Pages (from-to)1817-1825
Number of pages9
JournalJournal of Porous Materials
Volume31
Issue number5
DOIs
StatePublished - Oct 2024

Keywords

  • Gallosilicate
  • Natrolite
  • Structural refinement
  • TO unit

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