Journal of Porous Materials

, Volume 18, Issue 6, pp 767–777 | Cite as

Effect of excess silicate on the structure formation and textural properties of MTS materials

  • Alexandra InayatEmail author
  • Andreas Kuhnt
  • Wilhelm Schwieger
  • Wolf-Dietrich Einicke
  • Jens Kullmann
  • Dirk Enke


The synthesis of micellar templated silica (MTS) materials has been conducted with different SiO2/CTAB molar ratios for two different cetyltrimethylammoniumbromide (CTAB) concentrations of 0.02 and 0.07 M to examine the structure formation for cubic (SBA-1) as well as for hexagonal (SBA-3) surfactant arrangement in acidic reaction medium with increasing silicate excess. Reaction products were analyzed with X-ray diffraction, N2 physisorption and TG-MS. It was found that an increase of the silicate concentration leads to the formation of additional silica gel in the resulting MTS material, which causes not only a decrease of specific surface area and pore volume, but also of the mesopore diameter. The latter effect is explained by a proposed embedding theory. Furthermore, with increasing silicate content in the synthesis mixture a phase transformation from hexagonal to cubic pore arrangement was found for the CTAB concentration of 0.07 M and the maximum SiO2/CTAB molar ratio for ordered pore arrangement has been determined.


Micellar templated silica (MTS) Silicate excess SBA-1 SBA-3 Pore arrangement Textural properties 



Financial support from the Fonds der Chemischen Industrie and the Deutsche Forschungsgemeinschaft (DFG) within the Cluster of Excellence “Engineering of Advanced Materials” is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Alexandra Inayat
    • 1
    Email author
  • Andreas Kuhnt
    • 1
  • Wilhelm Schwieger
    • 1
  • Wolf-Dietrich Einicke
    • 2
  • Jens Kullmann
    • 2
  • Dirk Enke
    • 2
  1. 1.Chair of Chemical Reaction EngineeringUniversity Erlangen-NurembergErlangenGermany
  2. 2.Institute of Technical ChemistryUniversity LeipzigLeipzigGermany

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