Formation of a new Ia-3d cubic meso-structured silica via triblock copolymer-assisted synthesis

A new mesoporous silica structure with cubic Iad symmetry has been synthesized. The structure has very large unit cell dimensions, up to 250 A in the as-synthesized form and 222 A after calcination, and the surface area is around 700 m2/g. The syntheses were done according to well-established synthe...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2003-04, Vol.125 (15), p.4402-4403
Main Authors: Flodström, Katarina, Alfredsson, Viveka, Källrot, Niklas
Format: Article
Language:English
Online Access:Get full text
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Summary:A new mesoporous silica structure with cubic Iad symmetry has been synthesized. The structure has very large unit cell dimensions, up to 250 A in the as-synthesized form and 222 A after calcination, and the surface area is around 700 m2/g. The syntheses were done according to well-established synthesis conditions with the triblock copolymers Pluronics P103 or P123, except for the addition of NaI to the synthesis mixture. Small-angle X-ray scattering revealed that the sample has Iad symmetry. According to electron micrographs, the structure is similar to that of MCM-48, and we thus propose that the structure lies on the gyroid minimal surface.
ISSN:0002-7863
1520-5126