期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202200677
关键词
Methanol-to-Hydrocarbons Reaction; Nanocages; Open Nanostructures; ZSM-5; Zeolites
资金
- National Key Research and Development Program of China [2021YFA1501202]
- National Natural Science Foundation of China [21920102005, 21835002, 21621001]
- 111 Project [B17020]
We present an anisotropic-kinetics transformation strategy for preparing single-crystalline aluminosilicate MFI zeolites with highly open nanoarchitectures and hierarchical porosities. The strategy involves in situ etching and recrystallization of pure-silica MFI zeolite nanotemplates under hydrothermal conditions. The resulting ZSM-5 nanocages exhibit enhanced catalytic lifetime and lower coking rate in the methanol-to-hydrocarbons reaction compared to conventional microcrystals and nanocrystals.
We report an anisotropic-kinetics transformation strategy to prepare single-crystalline aluminosilicate MFI zeolites (ZSM-5) with highly open nanoarchitectures and hierarchical porosities. The methodology relies on the cooperative effect of in situ etching and recrystallization on the evolution of pure-silica MFI zeolite (silicalite-1) nanotemplates under hydrothermal conditions. The strategy enables a controllable preparation of ZSM-5 nanostructures with diverse open geometries by tuning the relative rate difference between etching and recrystallization processes. Meanwhile, it can also be extended to synthesize other heteroatom-substituted MFI zeolite nanocages. Compared with conventional ZSM-5 microcrystals, nanocrystals, and nanoboxes, the ZSM-5 nanocages with single-crystalline nature, highly open nanoarchitectures, and hierarchical porosities exhibit remarkably enhanced catalytic lifetime and low coking rate in the methanol-to-hydrocarbons (MTH) reaction.
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