Facile Synthesis of Hierarchical Nanosized Single-Crystal Aluminophosphate Molecular Sieves from Highly Homogeneous and Concentrated Precursors
Facile Synthesis of Hierarchical Nanosized Single-Crystal Aluminophosphate Molecular Sieves from Highly Homogeneous and Concentrated Precursors
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由高度均质且浓缩的前体轻松合成多级纳米单晶铝磷酸盐分子筛
DOI：
10.1002/anie.201915144
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Tian Zhijian
中科院分区：
文献类型：
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作者：
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
在没有生长调节剂和介孔剂的情况下合成分级纳米沸石材料仍然是一个巨大的挑战。在本文中，我们报告了一种通过制备高度均匀和浓缩的前体并在高温下加热来生产分级纳米级单晶铝磷酸盐分子筛的一般合成方法。因此，合成了LTA（8环）、AEL（10环）、AFI（12环）和-CLO（20环）拓扑结构的磷酸铝沸石，其范围从小孔到超大孔。这些材料显示出优异的性能，包括小晶粒（30-150 nm）、良好的单分散性、丰富的中孔和优异的热稳定性。 一项时间依赖性研究揭示了通过颗粒附着的非经典结晶途径。这一工作为开发分级纳米沸石材料和理解其结晶机理开辟了新的途径。
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.