Synthesis and size control of uniform, spherically shaped hexagonal mesoporous silica

Benjawan Moongraksathum, Yu Wen Chen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Spherical hexagonal mesoporous silica (HMS) was prepared at ambient temperature using dodecylamine (DDA) as the template and tetraethyl orthosilicate (TEOS) as the silica source. The properties of the HMS particles were characterised by X-ray powder diffraction, scanning electron microscopy and N 2 sorption measurements, and the effects of DDA concentration, stirring speed and rate of TEOS addition were evaluated. The HMS samples exhibited substantial framework-confined and textural mesoporosity. The particle and pore sizes of the spherical HMS decreased with decreasing DDA concentration. With increasing stirring speed, the HMS particle size decreased slightly, and the size distribution narrowed. Increasing the rate of TEOS addition resulted in a decrease in HMS particle size. The findings indicate that DDA concentration, stirring speed and rate of TEOS addition are all important in controlling particle size and shape during HMS synthesis.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalJournal of Porous Materials
Volume26
Issue number1
DOIs
StatePublished - 15 Feb 2019

Keywords

  • Hexagonal mesoporous silica
  • Mesoporous material
  • Silicate
  • Spheroids

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