Effect of excess silicate on the structure formation and textural properties of MTS materials
Inayat A, Kuhnt A, Schwieger W, Einicke WD, Kullmann J, Enke D (2011)
Publication Status: Published
Publication Type: Journal article
Publication year: 2011
Journal
Publisher: Springer Verlag (Germany)
Book Volume: 18
Pages Range: 767-777
DOI: 10.1007/s10934-010-9439-4
Abstract
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, N-2 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.
Authors with CRIS profile
Alexandra Inayat
Lehrstuhl für Chemische Reaktionstechnik
Andreas Kuhnt
Lehrstuhl für Chemische Reaktionstechnik
Wilhelm Schwieger
Professur für Technische Chemie (Reaktionstechnik)
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Inayat, A., Kuhnt, A., Schwieger, W., Einicke, W.-D., Kullmann, J., & Enke, D. (2011). Effect of excess silicate on the structure formation and textural properties of MTS materials. Journal of Porous Materials, 18, 767-777. https://dx.doi.org/10.1007/s10934-010-9439-4
MLA:
Inayat, Alexandra, et al. "Effect of excess silicate on the structure formation and textural properties of MTS materials." Journal of Porous Materials 18 (2011): 767-777.
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