▎ 摘　　要

NOVELTY - Preparing graphene hydrogel from graphene oxide comprises preparing colloidal aqueous solution of 0.25-2 mg/ml graphene oxide, adding 20-100 mM hydrochloric acid, phosphoric acid or 10-50 mM sulfuric acid, and 0.5-25 mg/ml metal of aluminum, magnesium, zinc, iron, nickel to the solution, and adding reducing agent comprising sodium bisulfate, sodium sulfide, sodium iodide, sodium ascorbate, vitamin C, hydroiodic acid, 0.02-0.1 mM hydroquinone or 0.05-0.2 mM hydrazine hydrate, and the mixture thus formed is heated to 50-90 degrees C for 30 minutes up to 12 hours, where the reducing agent. USE - The method is useful for preparing graphene hydrogel from graphene oxide. DETAILED DESCRIPTION - Preparing graphene hydrogel from graphene oxide comprises preparing colloidal aqueous solution of 0.25-2 mg/ml graphene oxide, adding 20-100 mM hydrochloric acid, phosphoric acid or 10-50 mM sulfuric acid, and 0.5-25 mg/ml metal of aluminum, magnesium, zinc, iron, nickel to the solution, where the acid reaction with this metal forms a metal salt and hydrogen in the nascent state which bubbles through the colloidal aqueous solution while reducing part of the epoxide, carbonyl, carboxy and hydroxy functional groups of the graphene oxide attached to its carbon atoms, as a result, carbon-carbon double bonds are formed between these carbon atoms and the colloidal aqueous solution of the graphene oxide is transformed into a solution of the partially reduced graphene oxide in the form of a viscous gel, after removing the remaining metal from this viscous gel and also after removing the acid residue and the undesirable acid-metal reaction products by centrifuging and washing with deionized water, it is transformed into a dispersion in deionized water and adding reducing agent comprising sodium bisulfate, sodium sulfide, sodium iodide, sodium ascorbate, vitamin C, hydroiodic acid, 0.02-0.1 mM hydroquinone or 0.05-0.2 mM hydrazine hydrate, and the mixture thus formed is heated to 50-90 degrees C for 30 minutes up to 12 hours, where the reducing agent reduces part of the remaining epoxide groups of graphene oxide attached to its carbon atoms, as a result of which further carbon-carbon double bonds are formed between these carbon atoms, and the partially reduced graphene oxide is converted to graphene hydrogel.