▎ 摘　　要

NOVELTY - Preparing adsorbing material comprises (i) ultrasonicating graphene oxide solution to obtain reduced graphene oxide solution; (ii) adding into ferric chloride solution under magnetic stirring, ultrasonicating in an ultrasonic cleaner, and uniformly dispersing to obtain reduced graphite oxide- ferric chloride dispersion; (iii) adding beta -cyclodextrin and aqueous ammonia into the mixed solution described in the step (ii) to adjust the pH, and the ratio of the mixed solution to beta -cyclodextrin and aqueous ammonia is 110-240 ml:1-4 g:14 ml, and subjecting to stirring at room temperature for 0.5-2 hours; (iv) adding ascorbic acid into the solution described in step (iii), where the above-mentioned ascorbic acid and the mixed material ratio of the material is 60-240 mg:110-240 ml and ultrasonicating for 10-30 minutes; and (v) adding the solution of step (iv) into a container, placing in a water bath, reacting in a water bath at 80-120 degrees C for 3-6 hours. USE - The method is useful for preparing adsorbing material. ADVANTAGE - The method is simple, easy to control and economical. DETAILED DESCRIPTION - Preparing adsorbing material comprises (i) ultrasonicating 1-4 mg/ml graphene oxide solution for 2-4 hours to obtain reduced graphene oxide solution; (ii) adding the obtain reduced graphene oxide solution into 1-4 mol/l ferric chloride solution under magnetic stirring, where the volume ratio of the reduced graphite oxide solution and the ferric chloride solution is 10-20:1-4, ultrasonicating in an ultrasonic cleaner for 60-120 minutes, and uniformly dispersing to obtain reduced graphite oxide- ferric chloride dispersion; (iii) adding beta -cyclodextrin and aqueous ammonia into the mixed solution described in the step (ii) to adjust the pH, and the ratio of the mixed solution to beta -cyclodextrin and aqueous ammonia is 110-240 ml:1-4 g:14 ml, and subjecting to stirring at room temperature for 0.5-2 hours; (iv) adding ascorbic acid into the solution described in step (iii), where the above-mentioned ascorbic acid and the mixed material ratio of the material is 60-240 mg:110-240 ml and ultrasonicating for 10-30 minutes; and (v) adding the solution of step (iv) into a container, placing in a water bath, reacting in a water bath at 80-120 degrees C for 3-6 hours.