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- Title
Co-development of Crystalline and Mesoscopic Order in Mesostructured Zeolite Nanosheets.
- Authors
Messinger, Robert J.; Na, Kyungsu; Seo, Yongbeom; Ryoo, Ryong; Chmelka, Bradley F.
- Abstract
Mesoporous zeolites are a new and technologically important class of materials that exhibit improved diffusion and catalytic reaction properties compared to conventional zeolites with sub-nanometer pore dimensions. During their syntheses, the transient developments of crystalline and mesoscopic order are closely coupled and challenging to control. Correlated solid-state NMR, X-ray, and electron microscopy analyses yield new molecular-level insights on the interactions and distributions of complicated organic structure-directing agents with respect to crystallizing zeolite frameworks. The analyses reveal the formation of an intermediate layered silicate phase, which subsequently transforms into zeolite nanosheets with uniform nano- and mesoscale porosities. Such materials result from coupled surfactant self-assembly and inorganic crystallization processes, the interplay between which governs the onset and development of framework structural order on different length and time scales.
- Subjects
MESOSCOPIC systems; ZEOLITES; NUCLEAR magnetic resonance; ELECTRON microscopy; X-ray detection
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 3, p941
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201408623