Facile Synthesis of Hierarchical Nanosized Single‐Crystal Aluminophosphate Molecular Sieves from Highly Homogeneous and Concentrated Precursors

The synthesis of hierarchical nanosized zeolite materials without growth modifiers and mesoporogens remains a substantial challenge. Herein, we report a general synthetic approach to produce hierarchical nanosized single‐crystal aluminophosphate molecular sieves by preparing highly homogeneous and c...

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Published in:Angewandte Chemie International Edition 2020-02, Vol.59 (9), p.3455-3459
Main Authors: Tao, Shuo, Li, Xiaolei, Wang, Xiaoge, Wei, Ying, Jia, Yunling, Ju, Jing, Cheng, Yuanhui, Wang, Huaisheng, Gong, Shuwen, Yao, Xingjun, Gao, Haixu, Zhang, Cunyin, Zang, Qiqi, Tian, Zhijian
Format: Article
Language:English
Subjects:
Aluminum phosphate
crystal growth
Crystallites
Crystallization
Crystals
heterogenous catalysis
High temperature
mesoporous materials
Molecular sieves
nanocrystals
Precursors
Thermal stability
Time dependence
Topology
zeolite materials
Zeolites
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Summary:The synthesis of hierarchical nanosized zeolite materials without growth modifiers and mesoporogens remains a substantial challenge. Herein, we report a general synthetic approach to produce hierarchical nanosized single‐crystal aluminophosphate molecular sieves by preparing highly homogeneous and concentrated precursors and heating at elevated temperatures. Accordingly, aluminophosphate zeotypes of LTA (8‐rings), AEL (10‐rings), AFI (12‐rings), and ‐CLO (20‐rings) topologies, ranging from small to extra‐large pores, were synthesized. These materials show exceptional properties, including small crystallites (30–150 nm), good monodispersity, abundant mesopores, and excellent thermal stability. A time‐dependent study revealed a non‐classical crystallization pathway by particle attachment. This work opens a new avenue for the development of hierarchical nanosized zeolite materials and understanding their crystallization mechanism. Hierarchical nanosized single‐crystal zeotypes: AEL‐, AFI‐, LTA‐, and ‐CLO‐type aluminophosphate molecular sieve nanocrystals with intracrystalline mesopores have been synthesized from highly homogeneous and concentrated precursors without growth modifiers and mesoporogens.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201915144