Observing a Zeolite Nucleus (Subcrystal) with a Uniform Framework Structure and Its Oriented Attachment without Single-Molecule Addition,Angewandte Chemie International Edition

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Observing a Zeolite Nucleus (Subcrystal) with a Uniform Framework Structure and Its Oriented Attachment without Single-Molecule Addition
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2021-04-09 , DOI: 10.1002/anie.202102621
Zhizheng Sheng ₁ , He Li ₁ , Ke Du ₁ , Lou Gao ₁ , Jing Ju ₂ , Yahong Zhang ₃ , Yi Tang ₁

Affiliation

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.

中文翻译：

观察具有均匀骨架结构的沸石核（亚晶）及其定向附着而不添加单分子

沸石的多重复杂结晶过程，包括互补的单分子缩合和颗粒组装，以及交替主导的成核和生长行为，在沸石结晶中起着至关重要的作用，但同时也使我们难以研究各自的影响。在此，我们从合成溶液中剥离晶核，发现高有序的晶核（亚晶）是点燃沸石晶体高速生长的前提。尺寸仅为 6-10 nm 的高阶亚晶具有规则的孔径结构和类似于沸石纳米晶的微孔面积。有趣的是，亚晶向纳米片的单一取向聚集过程得到了很好的观察和表征，其中单分子加成过程受到了极大的抑制。如果可以扩展更大范围的沸石型核，

更新日期：2021-06-02

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