ZIF-8 MOF was synthesized using the wet chemical synthesis method mentioned elsewhere . A solution containing 775 mg of 2-methylimidazole (9.44 mmol) dissolved in 10 mL of methanol (MeOH) was mixed with a solution of 350 mg of Zn(NO3)2•4H2O (1.34 mmol) in 10 mL of MeOH at 50 °C. The resulting suspension was stirred for 5 minutes and aged for 10 minutes. The suspension was centrifuged, washed with tetrahydrofuran (THF) (3×10 mL), and dried in a vacuum. The final product was a white powder with a weight of 66 mg.