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

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Inayat A, Kuhnt A, Schwieger W, Einicke WD, Kullmann J, Enke D
Zeitschrift: Journal of Porous Materials
Verlag: Springer Verlag (Germany)
Jahr der Veröffentlichung: 2011
Band: 18
Seitenbereich: 767-777
ISSN: 1380-2224


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.



FAU-Autoren / FAU-Herausgeber

Inayat, Alexandra Dr.-Ing.
Lehrstuhl für Chemische Reaktionstechnik
Kuhnt, Andreas
Lehrstuhl für Chemische Reaktionstechnik
Schwieger, Wilhelm Prof. Dr.
Professur für Technische Chemie (Reaktionstechnik)


Autor(en) der externen Einrichtung(en)
Universität Leipzig


Zitierweisen

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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Zuletzt aktualisiert 2018-10-07 um 19:23