Mesoporous materials; Electron tomography; Image Analysis
Abstract :
[en] Electron tomography and image analysis are combined to characterize ordered mesoporous silica SBA-15. The morphology of the mesopores with average diameter 6 nm is analyzed in terms of cylinders having variable radii and centers that are statistically centered on the points of a distorted hexagonal lattice. The variations in the mesopore centers and radii add up and result in pore wall corrugation with amplitude of 1.6 nm. The correlation length of the corrugation along the pore axis was found to be 4-5 nm. The amplitude of the corrugation compared well with the 1.9 nm thick microporous corona obtained from X-ray diffraction (XRD). In general, the present approach provides a detailed microscopic 3D model of nanostructured materials that complements macroscopic measurements such as physisorption and XRD.
Research Center/Unit :
Departement de Chimie Appliquée
Disciplines :
Materials science & engineering Chemistry
Author, co-author :
Gommes, Cédric ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Friedrich, Heiner; Universiteit Utrecht > Inorganic Chemistry and Catalysis
Wolters, Mariska
de Jongh, Petra
de Jong, Krijn; Universiteit Utrecht > Inorganic Chemistry and Catalysis
Language :
English
Title :
Quantitative Characterization of Pore Corrugation in Ordered Mesoporous Materials Using Image Analysis of Electron Tomograms
Publication date :
2009
Journal title :
Chemistry of Materials
ISSN :
0897-4756
eISSN :
1520-5002
Publisher :
American Chemical Society, Washington, United States - District of Columbia
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