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Siliceous Mesostructured Cellular Foams with Uniformly Sized and Shaped Pores

Published online by Cambridge University Press:  10 February 2011

P. Schmidt-Winkel ,
W. W. Lukens Jr ,
D. Zhao ,
P. Yang ,
B. F. Chmelka  and
G. D. Stucky
P. Schmidt-Winkel
Affiliation:
Department of Chemistry Materials Research Laboratory, University of California, Santa Barbara, CA 93106
W. W. Lukens Jr
Affiliation:
Department of Chemistry Materials Research Laboratory, University of California, Santa Barbara, CA 93106
D. Zhao
Affiliation:
Department of Chemistry
P. Yang
Affiliation:
Department of Chemistry
B. F. Chmelka
Affiliation:
Department of Chemical Engineering Materials Research Laboratory, University of California, Santa Barbara, CA 93106
G. D. Stucky
Affiliation:
Department of Chemistry Materials Research Laboratory, University of California, Santa Barbara, CA 93106
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Abstract

Mesostructured siliceous cellular foams (mesocellular foams, MCFs) with homogeneous ultra-large mesopores are described. MCFs consist of uniform spherical cells 21–36 nm in diameter and possess surface areas up to 900 m2/g. Uniform windows, 7–18 nm in diameter, interconnect the cells to form a continuous 3-D pore system, which makes the MCFs attractive candidates for supports for catalysis and in separation and immobilization involving large molecules. They may be of interest in low-dielectric applications. The size of the cells can be controlled by the concentration of the added organic cosolvent. Adding small amounts of NH4F selectively enlarges the windows. We propose that the MCFs are templated by oil-inwater microemulsion droplets. The large-pore MCF materials resemble aerogels, with the benefit of a facilitated synthesis procedure in combination with well-defined pores and wall structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 241
Copyright
Copyright © Materials Research Society 1999

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References

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