▎ 摘　　要

NOVELTY - Preparing graphene/ZIF-7 composite gel comprises regulating the concentration of zinc nitrate hexahydrate and benzimidazole, the composite gel with controllable ZIF-7 load capacity is prepared, and consists of the following steps: (a) preparing graphene gel by ultrasonically dispersing graphene oxide solid powder in distilled water, dissolving L-ascorbic acid and reacting at 95°C for 2 hours to form columnar graphene gel, (b) exchanging the solvent with dimethylformamide (DMF), immersing the graphene gel prepared in step (a) in the DMF solution of zinc nitrate hexahydrate, and allowing to stand for 24 hours, washing with DMF 3 times, immersing in the DMF solution of benzimidazole, and allowing to stand for 24 hours to obtain graphene /ZIF-7 composite gel (GO/ZIF-7). USE - The method is useful for preparing graphene/ZIF-7 composite gel. ADVANTAGE - The graphene/ZIF-7 composite gel is suitable for water purification, gas separation and storage field.