▎ 摘　　要

NOVELTY - Removing impurities during preparation of graphene involves repeatedly sieving graphene oxide containing metallic impurities and non-metallic impurities during the sieving process, some metallic impurities are adsorbed by magnets. The sieved graphene oxide is put in the reaction kettle, added the first decontamination solution and fully stirred the reaction for 1 hours, then added the excess soda ash and stir the reaction for 20 minutes, removed the reacted raw materials, and then filtered and rinsed them with ion-free water. The filtered and rinsed raw materials are placed in a reactor, heat the raw materials, and then add the second de-trash liquid to fully stir the reaction for 1 hour. The reaction process is a closed environment, and the gas generated by the reaction is pumped out through an air pump and through the sodium hydroxide solution absorption treatment. USE - Method for removing impurities during preparation of graphene. ADVANTAGE - The processing method is convenient, fast and pollution-free. The impurity of manganese is converted into manganese dioxide by heating, and the reaction is carried out through the second impurity removing liquid. The soluble salt is generated and then dissolved in ion-free water and rinsed through the high melting point of graphene, the remaining metal impurities and non-metal impurities are removed by high temperature de-impurity method. DETAILED DESCRIPTION - Removing impurities during preparation of graphene involves repeatedly sieving graphene oxide containing metallic impurities and non-metallic impurities during the sieving process, some metallic impurities are adsorbed by magnets. The sieved graphene oxide is put in the reaction kettle, added the first decontamination solution and fully stirred the reaction for 1 hours, then added the excess soda ash and stir the reaction for 20 minutes, removed the reacted raw materials, and then filtered and rinsed them with ion-free water. The filtered and rinsed raw materials are placed in a reactor, heat the raw materials, and then add the second de-trash liquid to fully stir the reaction for 1 hour. The reaction process is a closed environment, and the gas generated by the reaction is pumped out through an air pump and through the sodium hydroxide solution absorption treatment. The raw materials are put in the pressure heating reaction furnace, press and heated for 1 hour, and finally rinsed with ion-free water to prepare graphene after impurity removal.