Influence of the kind of layered disodium disilicates on the formation of silica-organic mesostructured materials

Munetaka Kato, Tetsuro Shigeno, Tatsuo Kimura, Kazuyuki Kuroda

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Silica-based mesostructured materials are formed using hydrated α-sodium disilicate and hexadecyltrimethylammonium (C 16TMA) chloride at various C 16TMA/Si molar ratios, and compared with those from kanemite. When the C 16TMA/Si ratios are 0.2, 0.5, 0.7, and 1.0, 2-D hexagonal structures are formed from hydrated α-sodium disilicate though the structures are collapsed on calcination. Less ordered hexagonal structures with straight channels arranged in one direction are formed when the C 16TMA/Si ratio exceeds 1.0. In the case of the reactions of kanemite with C 16TMA ions, lamellar mesostructures are formed at the ratios higher than 0.5, whereas a 2-D hexagonal structure is formed only at the ratio of 0.2. Mesoporous silica (SSW-1) derived from hydrated α-sodium disilicate is prepared at lower pH without acid treatment when the C 16TMA/Si ratio is 2.0. The volume occupied by the headgroups of C 16TMA ions in hydrated α-sodium disilicate should be larger than that in kanemite because the distance between Si-O - sites in the bending direction of hydrated α-sodium disilicate is longer than that of kanemite due to the unique layered silicate structure.

Original languageEnglish
Pages (from-to)3224-3230
Number of pages7
JournalChemistry of Materials
Volume16
Issue number17
DOIs
Publication statusPublished - 2004 Aug 24

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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