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Abstract
Zeolite nanosheets can be used for the fabrication of low-defect-density, thin, and oriented zeolite separation membranes. However, methods for manipulating their morphology are limited, hindering progress toward improved performance. We report the direct synthesis (i.e., without using exfoliation, etching, or other top-down processing) of thin, flat MFI nanosheets and demonstrate their use as high-performance membranes for xylene isomer separations. Our MFI nanosheets were synthesized using nanosheet fragments as seeds instead of the previously used MFI nanoparticles. The obtained MFI nanosheets exhibit improved thickness uniformity and are free of rotational and MEL intergrowths as shown by transmission electron microscopy (TEM) imaging. The nanosheets can form well-packed nanosheet coatings. Upon gel-free secondary growth, the obtained zeolite MFI membranes show high separation performance for xylene isomers at elevated temperature (e.g., p-xylene flux up to 1.5 × 10-3 mol m-2 s-1 and p-/o-xylene separation factor of ∼600 at 250°C).
Original language | English (US) |
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Article number | abm8162 |
Journal | Science advances |
Volume | 8 |
Issue number | 14 |
DOIs | |
State | Published - Apr 2022 |
Bibliographical note
Publisher Copyright:© 2022 The Authors.
MRSEC Support
- Partial
PubMed: MeSH publication types
- Journal Article
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Dive into the research topics of 'Twin-free, directly synthesized MFI nanosheets with improved thickness uniformity and their use in membrane fabrication'. Together they form a unique fingerprint.Projects
- 2 Active
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IRG-1: Ionic Control of Materials
Leighton, C., Birol, T., Fernandes, R. M., Frisbie, D., Greven, M., Jalan, B., Mkhoyan, A., Walter, J. & Wang, X.
9/1/20 → …
Project: Research project
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University of Minnesota Materials Research Science and Engineering Center (DMR-2011401)
THE NATIONAL SCIENCE FOUNDATION
9/1/20 → 8/31/26
Project: Research project