Effect from Mechanical Stirring Time and Speed on Adsorption Performance of ZIF‐90 for n‐Hexane

Zeolite imidazolate frameworks (ZIFs) represent a class of metal‐organic frameworks (MOFs) for various potential applications due to their outstanding properties. However, to date, the creation of nanoframes with tunable structure faces a challenge. Herein, we develop a facile and efficient physical method that allows the preparation of ZIF‐90 with controllable surface area. In this study, the effect of various stirring time and speed in the acceleration of the precursor dissolution are revealed. The study shows that a moderate stirring speed (640 r · min –1 ) and reaction time (6 h) are the optimal conditions to synthesize ZIF‐90 with a high adsorption capacity. More importantly, the maximum adsorption amount of n ‐hexane is up to 211 mg · g –1 by using this as‐prepared sample, which increases by 60 % in comparison with that of the minimum from other sample (133 mg · g –1 ).