High-Throughput Synthesis and Structure of Zeolite ZSM-43 with Two-Directional 8-Ring Channels

作者：Willhammar, Tom; Su, Jie; Yun, Yifeng; Zou, Xiaodong^*; Afeworki, Mobae; Weston, Simon C.; Vroman, Hilda B.; Lonergan, William W.; Strohmaier, Karl G.^*

来源：Inorganic Chemistry, 2017, 56(15): 8856-8864.

DOI：10.1021/acs.inorgchem.7b00752

• HYDROTHERMAL SYNTHESIS
• COMBINATORIAL APPROACH
• DIFFRACTION DATA
• ALUMINOSILICATE
• ADSORPTION
• ADSORBENT
• EU-12
• PORE
• CO2

The aluminosilicate zeolite ZSM-43 (where ZSM = Zeolite Socony Mobil) was first synthesized more than 3 decades ago, but its chemical structure remained unsolved because of its poor crystallinity and small crystal size. Here we present optimization of the ZSM-43 synthesis using a high-throughput approach and subsequent structure determination by the combination of electron crystallographic methods and powder X-ray diffraction. The synthesis required the use of a combination of both inorganic (Cs+ and K+) and organic (choline) structure-directing agents. High-throughput synthesis enabled a screening of the synthesis conditions, which made it possible to optimize the synthesis, despite its complexity, in order to obtain a material with significantly improved crystallinity. When both rotation electron diffraction and high resolution transmission electron microscopy imaging techniques are applied, the structure of ZSM-43 could be determined. The structure of ZSM-43 is a new zeolite framework type and possesses a unique two-dimensional channel system limited by 8-ring channels ZSM-43 is stable upon calcination, and sorption measurements show that the material is suitable for adsorption of carbon dioxide as well as methane.

• 出版日期2017-8-7
• 单位北京大学