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Synthesis, structure and adsorption properties of SBA-15 materials functionalized with bridged and surface groups
|Mariusz Barczak 1, Andrzej Dąbrowski|
1. Uniwersytet Marii Curie Skłodowskiej (UMCS), Pl. Marii Curie Skłodowskiej 3, Lublin 20-218, Poland
Ordered mesoporous organosilicas are very attractive materials due to their high surface areas, large volumes of ordered mesopores and diverse morphology what makes them attractive potential catalysts and adsorbents. Possibility of introduction of the organic and inorganic groups into the ordered structure of the final material during the synthesis is an additional invaluable advantage of the sol-gel processing of organosilicas. In the present work channel-like mesoporous organosilicas were synthesized via co-condensation of tetraethyl orthosilicate (TEOS) with bridged polysilsesquioxane monomers bearing –C2H4–, –C6H4– bridges and alkoxysilanes bearing aminopropyl and mercaptopropyl groups. Obtained materials were characterized by IR spectroscopy, powder X-ray diffraction (XRD), transmission electron spectroscopy (TEM) thermogravimetry, elemental analysis and nitrogen sorption measurements.
Obtained materials have well-developed ordered mesoporous structure - values of specific surface area are in the range 700-1000 m2/g and the size of the cylindrical mesopores is in the range 6.5-9.4 nm. It was determined that size of the mesopores strongly depends on small amounts of monomers co-condensing with TEOS. The XRD and TEM data shows high degree of the order of the final structures.
Presentation: Poster at E-MRS Fall Meeting 2007, Symposium A, by Mariusz Barczak
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-19 10:31 Revised: 2009-06-07 00:44