Synthesis of mesoporous silica foams with hierarchical trimodal pore structures

Keisei Suzuki, Kenichi Ikari, Hiroaki Imai

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

A new type of mesoporous silica foam having extremely low bulk density (<0.01 g cm-3), high mesopore volume (>2 cm3 g-1) and specific surface area (> 1000 m2 g-1) was prepared by the spraying of aqueous siliceous solutions containing alkyltrimethylammonium surfactants under high pH conditions. These remarkable properties were ascribed to macrovoids and two kinds of mesopores ranging around 3 and 40 nm. The macrocellular structure produced with air bubbles was stabilized through a rapid condensation reaction during drying. The framework of the macrovoids contained mesopores with a bimodal distribution derived from the surfactant micelles and the interparticle spaces of silica nanoparticles. The hierarchical self-assembly of surfactant micelles, silica nanoparticles and air bubbles provided the specific architecture with a trimodal pore size distribution.

Original languageEnglish
Pages (from-to)1812-1816
Number of pages5
JournalJournal of Materials Chemistry
Volume13
Issue number7
DOIs
Publication statusPublished - 2003 Jul 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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