Time-resolved in situ x-ray powder diffraction study of the formation of mesoporous silicates

Stephen O'Brien, Robin J. Francis, Andrew Fogg, Dermot O'Hare, Nanae Okazaki, Kazuyuki Kuroda

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

In situ, time-resolved energy-dispersive X-ray diffraction has been used to investigate the formation of the mesoporous silicates FSM-16 and MCM-41. The data suggest that the silica-surfactant mesophases formed are highly dependent on the reactant medium, the effect of the silica source being one of the main determining factors. Kanemite, a layered polysilicate, proves to be an excellent silicate source, giving rise to relatively ordered mesophases and subsequent highly ordered mesoporous silicate products. The time-resolved in situ X-ray diffraction data of the kanemite-alkytrimethylammonium system indicated that the silica-surfactant mesophase precursor to FSM-16 forms from a medium containing a number of intercalated silicate phases, while in contrast, the hexagonal mesophase precursor to MCM-41 forms from a medium containing no other ordered silicate-surfactant phases detectable by in situ X-ray diffraction.

Original languageEnglish
Pages (from-to)1822-1832
Number of pages11
JournalChemistry of Materials
Volume11
Issue number7
DOIs
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

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

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