▎ 摘　　要

NOVELTY - Preparing graphene material involves processing graphene oxide with ultrasonic waves at 20-25 kilo-hertz for 10-40 minutes. The obtained mixture is added to reaction kettle, and added with graphene fiber membrane. The obtained mixture is heated to 150-200 degrees C for 10-12 hours, and then cooled. The obtained mixture is freeze-dried at -50 degrees C to -15 degrees C at 10 pascal vacuum for 3-5 days to obtain graphene material. The graphene oxide and graphene fiber membrane are mixed in ratio of 1:3-30. USE - Method for preparing graphene material for processing methylene blue, methyl orange, phenol, cyclohexane, methylene chloride, n-butanol, tetrahydrofuran, ethyl acetate, ethanol, acetone, carbon tetrachloride, acetic acid, ethylene glycol, gasoline, olive oil and N, N- dimethylformamide (claimed). ADVANTAGE - The method enables to prepare macroscopic, stable and cost-effective graphene material that has large surface area and wide applicability in sewage treatment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene fiber membrane, which involves electro-spinning graphene.