▎ 摘　　要

NOVELTY - Preparing graphene-titanium-based metal-organic framework (MOF) material, comprises (1) placing graphene in a dilute nitric acid solution, and ultrasonically dispersing the dilute nitric acid solution containing graphene for 4-6 hours; (2) filtering and washing the graphene; (3) drying the graphene to obtain a pretreated graphene; (4) dispersing the pretreated graphene in step (3) in N,N-dimethylformamide to obtain a graphene-dispersed N,N-dimethylformamide solution under ultrasonic conditions; (5) dripping titanium tetrachloride into the graphene-dispersed N,N-dimethylformamide and continuously dispersing to obtain a precursor solution; (6) microwave heating the precursor solution to react; (7) filtering the system and washing the retentate to neutral; and (8) vacuum drying the retentate. USE - Preparing graphene-titanium-based MOF material. ADVANTAGE - The graphene-titanium-based MOF material has strong ability to deposit chromium ion (Cr6+) and a removal rate of chromium ion (Cr6+) within 30 minutes of 95%. DETAILED DESCRIPTION - Preparing graphene-titanium-based metal-organic framework (MOF) material, comprises (1) placing graphene in a dilute nitric acid solution, and ultrasonically dispersing the dilute nitric acid solution containing graphene for 4-6 hours; (2) filtering and washing the graphene after ultrasonic dispersion in step (1) until the surface is neutral; (3) drying the graphene washed in step (2) at 100-120 degrees C for 4-6 hours to obtain a pretreated graphene; (4) dispersing the pretreated graphene in step (3) in N,N-dimethylformamide to obtain a graphene-dispersed N,N-dimethylformamide solution under ultrasonic conditions; (5) dripping titanium tetrachloride into the graphene-dispersed N,N-dimethylformamide under ultrasonic conditions and continuously dispersing to obtain a precursor solution; (6) microwave heating the precursor solution in step (5) at 100-180 degrees C, and reacting at 100-180 degrees C for 6-8 hours; (7) filtering the system in step (6) and washing the retentate to neutral; and (8) after washing, vacuum drying the retentate for 10-12 hours to obtain the product.