Ultrasonic preparation of mesoporous silica using pyridinium ionic liquid

Ana Maria Putz, Adél Len, Catalin Ianăşi, Cecilia Savii, László Almásy

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Mesoporous silica matrices have been prepared via classic acid catalyzed and sono-catalyzed sol-gel routes. Tetramethoxysilan (TMOS) and methyl-trimethoxysilane (MTMS) were used as silica precursors, and N-butyl-3-methylpyridinium tetrafluoroborate ([bmPy][BF4]) was employed as co-solvent and pore template. The ionic liquid (IL) to silica mole ratio was varied between 0.007 and 0.07. Nitrogen adsorption-desorption and small-angle neutron scattering measurements were used to characterize the obtained materials. The ionic liquid played the role of catalyst that affected the formation of the primary xerogel particles, and changed the porosity of the materials. Ultrasound treatment resulted in microstructure change on the level of the colloid particle aggregates. In comparison with IL containing xerogels, the IL containing sonogels show increased pore diameter, bigger pore volumes and diminished surface areas.

Original languageEnglish
Pages (from-to)749-754
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume33
Issue number3
DOIs
Publication statusPublished - Mar 1 2016

Keywords

  • Ionic Liquid
  • MTMS (Trimethoxymethylsilane)
  • SANS
  • TMOS (Tetramethoxysilane)
  • Ultrasound

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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