Synthesis of silica mesoporous crystals with controlled structure and morphology using gemini surfactant

Qianru Chen, Yasuhiro Sakamoto, Osamu Terasaki, Shunai Che

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Silica mesoporous crystals with different morphologies were prepared based on the self-assembly of the gemini cationic surfactant [C16H33N+(CH3)2(CH2)3N+(CH3)3]Br2(C16-3-1) and tetraethyl orthosilicate (TEOS) in water under acidic condition. By controlling the kind of acids (H2SO4 or HCl), temperature and synthesis compositions, three well-ordered silica mesoporous crystals, cubic Fm over(3, ̄) m, three-dimensional hexagonal P63/mmc and cubic Pm over(3, ̄) n, with distinct morphologies were synthesized. In the synthesis system with H2SO4, the crystals changed the structure from Pm over(3, ̄) n to Fm over(3, ̄) m with decrease in acidity and increase in synthesis temperature; and in the synthesis with HCl, the crystals with Fm over(3, ̄) m and P63/mmc were synthesized by changing the synthesis compositions, especially C16-3-1/H2O and C16-3-1/TEOS molar ratios.

Original languageEnglish
Pages (from-to)24-33
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume105
Issue number1-2
DOIs
Publication statusPublished - 2007 Sep 15

Keywords

  • Gemini surfactant
  • Mesoporous silica
  • Mesostructure
  • Morphology

ASJC Scopus subject areas

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

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