Fast synthesis of zeolitic imidazolate framework ZIF-94 using NaOH and recycling reagents

ZIF-94 is a zeolitic imidazolate framework with the same SOD type topology than ZIF-8 but an aldehyde group functionalized organic ligand. This turns less thermally stable interesting properties of water and carbon dioxide adsorption, making former material highly suitable for capture technologies. In this work, alternative procedure synthesis was developed based on use NaOH as deprotonator. Besides, crystallization carried out in very short time (1–20 min) at room temperature while centrifuging 10,000 rpm. made possible simultaneous separation product giving rise, together inorganic deprotonator, to efficient process yields higher 65%. For best conditions tested (crystallization-centrifugation 5 min), 66 ± 24 nm particle size, crystalline 485 m2 g?1 specific surface area obtained yield 66.9%. Similar were when prepared from recycled reagents (solvent, ligand Zn salt).