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High-Throughput Synthesis and Structure of Zeolite ZSM-43 with Two-Directional 8-Ring Channels
Tom Willhammar1, Jie Su1, Yifeng Yun1
1Berzelii Center EXSELENT on Porous Materials, Department of Materials and Environmental Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden.
Inorganic Chemistry
|July 21, 2017
Summary
Researchers solved the structure of aluminosilicate zeolite ZSM-43 using advanced electron crystallography and X-ray diffraction. This new zeolite framework, optimized via high-throughput synthesis, shows potential for carbon dioxide and methane adsorption.
Area of Science:
- Materials Science
- Crystallography
- Chemistry
Background:
- The aluminosilicate zeolite ZSM-43 has remained structurally uncharacterized for over 30 years due to poor crystallinity and small crystal size.
- Previous attempts to solve the ZSM-43 structure were hindered by synthesis challenges.
Purpose of the Study:
- To optimize the synthesis of ZSM-43 using a high-throughput approach.
- To determine the chemical structure of ZSM-43.
- To investigate the adsorption properties of the determined zeolite structure.
Main Methods:
- High-throughput synthesis screening to optimize ZSM-43 preparation.
- Structure determination using a combination of rotation electron diffraction and powder X-ray diffraction.
- High-resolution transmission electron microscopy imaging.
- Sorption measurements for gas adsorption analysis.
Main Results:
- Optimized synthesis conditions yielded ZSM-43 with significantly improved crystallinity.
- The crystal structure of ZSM-43 was successfully determined, revealing a new zeolite framework type.
- The determined structure features a unique two-dimensional channel system bounded by 8-ring channels.
- ZSM-43 demonstrated stability upon calcination and suitability for CO2 and methane adsorption.
Conclusions:
- The structure of the aluminosilicate zeolite ZSM-43 has been elucidated for the first time.
- High-throughput synthesis and advanced electron crystallographic techniques were crucial for overcoming previous structural determination challenges.
- The newly identified ZSM-43 zeolite framework exhibits promising properties for gas adsorption applications, particularly for carbon dioxide and methane.
