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

研究成果: ジャーナルへの寄稿学術論文査読

13 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)33-40
ページ数8
ジャーナルMicroporous and Mesoporous Materials
271
DOI
出版ステータス出版済み - 2018 11月 15

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