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High-resolution electron microscopy and X-ray diffraction studies of MCM-48

✍ Scribed by Ralf Schmidt; Michael Stöcker; Duncan Akporiaye; Elisabeth Heggelund Tørstad; Arne Olsen

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
534 KB
Volume
5
Category
Article
ISSN
0927-6513

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✦ Synopsis

A cubic member of the M41S family with a three-dimensional pore system, denoted as MCM-48, was synthesised. By combining X-ray powder diffraction (XRD) with high-resolution electron microscopy (HREM), a cubic symmetry with an Ia3d space group was determined for the as-synthesised and the calcined MCM-48 material. Upon calcination the unit cell decreased from around 10.09 nm to about 8.1 nm. The overall pore structure was found to be quite unaffected by local variations in the structure and the decrease in the unit cell size upon calcination.

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