Comparative study of aluminosilicate glass and zeolite precursors in terms of Na environment and network structure

Hiroki Yamada, Sohei Sukenaga, Koji Ohara, Chokkalingam Anand, Mariko Ando, Hiroyuki Shibata, Tatsuya Okubo, Toru Wakihara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Revealing structural features of the amorphous precursor of zeolite is an important research topic for elucidating formation mechanism of zeolites. To understand the zeolite precursor's comprehensive structural features, this study compared the precursor with the glass possessing similar compositions. By combining the high-energy X-ray total scattering method, 23Na-MQ-MAS-NMR, and reverse Monte Carlo simulation, we revealed structural differences among FAU-type zeolites, their precursors, and glass with similar compositions. As for crystallization behavior of FAU-type zeolite, pair distribution function and NMR analyses revealed that the environment of Na became gradually ordered during the crystallization. In addition, relaxation of large aluminosilicate rings was also confirmed. Comparison of the zeolite precursor and the glass clarified differences in Na–O distances and ring distributions, and simulation modeling supported these insights.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume271
DOIs
Publication statusPublished - 2018 Nov 15

Keywords

  • Crystallization mechanism
  • FAU-type zeolite
  • NMR
  • Pair distribution function

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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