Quantitative characterization of pore corrugation in ordered mesoporous materials using image analysis of electron tomograms

Cedric J. Gommes, Heiner Friedrich, Mariska Wolters, Petra E. De Jongh, Krijn P. De Jong

Research output: Contribution to journalArticleAcademicpeer-review

80 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1311-1317
Number of pages7
JournalChemistry of Materials
Volume21
Issue number7
DOIs
Publication statusPublished - 14 Apr 2009

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