Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 24, Pages 13444-13451Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202102621
Keywords
crystal growth; evolution of nuclei; high-ordered subcrystal; unitary particle aggregation; zeolites
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Funding
- National Natural Science Foundation of China [21972025, 22088101] Funding Source: Medline
- National Major Research and Development Plan [2018YFA0209402] Funding Source: Medline
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High-ordered nuclei are found to be crucial for the rapid growth of zeolite crystals, and a process of oriented aggregation of subcrystals towards nanosheets is observed.
Multiple and complex crystallization process of zeolite including complementary single-molecule condensation and particle assembly, and alternately dominant nucleation and growth behavior, plays the critical role in zeolite crystallization but meanwhile makes us hard to study the respective effects. Herein, we strip nuclei from the synthetic solution and find that high-ordered nucleus (subcrystal) is the premise to ignite high-speed growth of zeolite crystal. The high-ordered subcrystals with the size of only 6-10 nm possess regular aperture structure and microporous area similar to zeolite nanocrystal. Interestingly, a unitary oriented aggregation process of the subcrystals towards nanosheets is well observed and characterized where single-molecule addition process is greatly repressed. If a wider range of zeotype nuclei can be expanded, a new synthetic strategy of zeotype materials with heterogeneous framework and active sites may be expected, which may novelize zeolite catalytic properties.
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