▎ 摘　　要

NOVELTY - One-step synthesis of nitrogen-sulfur co-doped graphene aerogels and their removal of zinc ions by electroabsorption comprises (a) ultrasonically dispersing the oxidized graphene in de-ionized water, adding L-cysteine, heating, soaking, freezing and drying to obtain nitrogen sulfur co-doped graphene aerogel material, (b) taking obtained product in step (a) into the obtained polyvinyl alcohol solution to obtain paste, freezing to obtain nitrogen-sulfur co-doped graphene aerogel paper electrode, (c) electrochemical method for removing heavy metal ion in water, and (d) desorbing and regenerating. USE - The method is useful for one-step synthesis of nitrogen-sulfur co-doped graphene aerogels and their removal of zinc ions by electroabsorption (claimed). ADVANTAGE - The method is simple, environmentally -friendly and fast. DETAILED DESCRIPTION - One-step synthesis of nitrogen-sulfur co-doped graphene aerogels and their removal of zinc ions by electroabsorption comprises (a) ultrasonically dispersing the oxidized graphene in de-ionized water, ultrasonic treating for 10-30 minutes to obtain disperse uniformly, adding L-cysteine, stirring to obtain scattered evenly, heating the mixed solution in water bath for 2 hours under the condition at 95 degrees C, soaking the reaction product in the distilled water for 2-3 days, freezing and drying to obtain nitrogen sulfur co-doped graphene aerogel material, (b) taking nitrogen sulfur co-doped graphene aerogel material into the obtained polyvinyl alcohol solution to obtain paste of the dispersion, removing 0.1-0.4 ml dispersion liquid is uniformly coated on, freezing and drying to obtain nitrogen-sulfur co-doped graphene aerogel paper electrode, (c) electrochemical method for removing heavy metal ion in water, preparing heavy metal ion solution, measuring the heavy metal ion solution placing in the electric absorbing container, subjecting the electroabsorption experiments on obtained nitrogen-sulfur co-doped graphene aerogel paper electrode, where electric absorbing heavy metal ion test uses a three-electrode system, paper electrode as the working electrode, platinum electrode as counter electrode, calomel electrode as the reference electrode, using the change of conductivity meter real-time monitoring solution conductivity, when the conductivity is constant, where the paper electrode absorption reaches balance, and (d) desorbing and regenerating by using electrode to reach the adsorption saturated nitrogen-sulfur co-doped graphene aerogel paper electrode, removing the electrode voltage on the electrical conductivity of the solution after recovery to the initial, realizes desorption regeneration electrode.