New insights into the initial steps of the formation of SBA-15 materials: an in situ small angle neutron scattering investigation

Chem Commun (Camb). 2007 Feb 28:(8):834-6. doi: 10.1039/b611208k. Epub 2006 Nov 29.

Abstract

Time-resolved in situ SANS investigations have provided direct experimental evidence for the three initial steps in the formation of the SBA-15 mesoporous material: an induction period is followed by a shape transformation of the micelles from spherical to cylindrical ones followed by the precipitation of a two-dimensional hexagonal phase.

MeSH terms

  • Electron Spin Resonance Spectroscopy
  • Indicators and Reagents
  • Magnetic Resonance Spectroscopy
  • Micelles
  • Microscopy, Electron, Transmission
  • Molecular Conformation
  • Molecular Weight
  • Neutrons
  • Scattering, Radiation
  • Silicon Dioxide / chemistry*
  • Spectrophotometry, Infrared
  • X-Rays

Substances

  • Indicators and Reagents
  • Micelles
  • SBA-15
  • Silicon Dioxide