Large-scale synthesis of ZIF-94 with large specific surface area from zinc chloride
https://doi.org/10.62239/jca.2025.068
Abstract
ZIF-94 is a zeolitic imidazolate framework with a sodalite structure. The pore system in ZIF-94 is formed from Zn2+ tetrahedra linked together through imidazole 4-methyl-5-imidazolecarboxaldehyde, similar to the linkage of SiO4– and AlO4– tetrahedra in zeolites. ZIF-94 contains acid and base sites, the pore diameter is about 0.3 nm connected to large cavities of 0.91 nm. Therefore, ZIF-94 is considered a new generation advanced material with great potential for applications in catalysis and adsorption. Up to now, synthesized ZIF-94 has a low specific surface area, there has been no report synthesizing ZIF-94 from ZnCl2 on a large-scale. Therefore, this paper presents the first research results on the synthesis of ZIF-94 with the highest specific surface area (BET) reaching 1.128 m2/g, and is also the first time to report the synthesis results of ZIF-94 from ZnCl2 on a large-scale. ZIF-94 exhibits a crystallinity of 100%, an average crystal size of 85 nm, thermal stability up to 280 oC, and a yield of 73%.
