Synthesis of highly-ordered mesoporous silica particles using mixed cationic and anionic surfactants as templates

Takahiro Ohkubo, Taku Ogura, Hideki Sakai, Masahiko Abe

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We applied a molecular assembly formed in an aqueous surfactant mixture of cationic cetyltrimethylammonium bromide (CTAB) and anionic sodium octylsulfate (SOS) as templates of mesoporous silica materials. The hexagonal pore size can be controlled between 3.22 and 3.66 nm with the mixed surfactant system. In addition, we could observe the lamellar structure of the mixed surfactants with precursor molecules, which strongly shows the possibility of precise control of both the pore size and the structure of pores by changing the mixing ratio of surfactants. Moreover, use of the cationic surfactant having longer hydrophobic chain like stearyltrimethylammonium bromide (STAB) caused the increase in d100 space and shifted the point of phase transition from hexagonal phase to lamellar phase to lower concentration of SOS.

Original languageEnglish
Pages (from-to)42-46
Number of pages5
JournalJournal of Colloid And Interface Science
Volume312
Issue number1
DOIs
Publication statusPublished - Aug 1 2007
Externally publishedYes

Keywords

  • Mesoporous silica
  • Mixed surfactant system
  • Templating method
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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