▎ 摘　　要

NOVELTY - Preparing carrageenan-graphene oxide super macroporous hydrogel comprises e.g. preparing graphene oxide by improved Hummers method comprising mixing flake graphite and sodium nitrate, adding sulfuric acid, placing in an ice bath and stirring, adding potassium permanganate, transferring to warm water bath and reacting, adding deionized water slowly and maintaining reaction temperature, stirring, adding required amount of water to prevent air bubbles, washing filter cake three times with dilute hydrochloric acid after hot filtration, washing again with ultrapure water, transferring filter cake to vacuum drying box and drying to obtain graphite oxide, dispersing graphite oxide and water in water to obtain brown-yellow solution and performing ultrasonic treatment until liquid is uniform and transparent to obtain graphene oxide, mixing carrageenan powder with deionized water to obtain carrageenan solution, heating to uniformly dissolve and adding potassium chloride. USE - The carrageenan-graphene oxide super macroporous hydrogel is useful as an adsorption material for adsorption of methylene blue dye in water (claimed). ADVANTAGE - The method: is simple in preparation and environmentally-friendly; and macroporous hydrogel adsorption effect is good. DETAILED DESCRIPTION - Preparing carrageenan-graphene oxide super macroporous hydrogel comprises (i) preparing graphene oxide by improved Hummers method comprising mixing 5 g 300 mesh flake graphite and 2 g sodium nitrate, adding 120 ml concentrated sulfuric acid, placing in an ice bath and stirring, adding 30 g potassium permanganate after 30 minutes and waiting for 60 minutes after the reaction, transferring to warm water bath at 40 degrees C and reacting for 30 minutes, adding 230 ml deionized water slowly and maintaining reaction temperature at 98 degrees C, stirring for 5 minutes, adding required amount of water to prevent air bubbles, washing filter cake three times with 150-200 ml dilute hydrochloric acid (3%) at 45 degrees C after hot filtration, washing again with 150-200 ml ultrapure water 3 times, transferring filter cake to 40 degrees C vacuum drying box and drying for 24 hours to obtain graphite oxide, dispersing graphite oxide and water in water at a ratio of 1 g: 20 ml to obtain brown-yellow solution and performing ultrasonic treatment until liquid is uniform and transparent to obtain graphene oxide; and (ii) mixing carrageenan powder with deionized water to obtain 1-5% carrageenan solution, heating at 100 degrees C until carrageenan powder is uniformly dissolved in water, adding potassium chloride to account for 0.04% of the carrageenan mass, formulating graphene oxide obtained in step (i) into 2.5% graphene oxide solution and sonicating at 1200 W for 2 minutes, mixing graphene oxide solution and carrageenan solution at a ratio of 2.5% of the mass of the carrageenan to the mass of the carrageenan, pouring flat quickly and freezing obtained carrageenan-graphene oxide macroporous hydrogel, dehydrating and drying.