▎ 摘　　要

NOVELTY - Preparing graphene oxide having high specific surface area comprises (i) subjecting graphite to chemical oxidation to obtain graphite oxide precursor; (ii) preparing a mixed medium of t-butanol and water using tertiary butyl alcohol and water in a volume ratio of 0.25:1-4:1; (iii) dispersing the graphite oxide precursor in the mixed medium of t-butanol and water to obtain a mixed solution, where greater than or equal to 50 ml of mixed medium is added to 1 g of graphite oxide; and (iv) subjecting the mixed solution to vacuum freeze-drying process. USE - The method is useful for preparing graphene oxide having high specific surface area (claimed). ADVANTAGE - The method: is quick process (claimed); utilizes tertiary butyl alcohol, which reduces the production cost; has simple process; improves the graphene oxide product structure property; and increases specific area of graphene oxide. DETAILED DESCRIPTION - Preparing graphene oxide having high specific surface area comprises (i) subjecting graphite to chemical oxidation to obtain graphite oxide precursor; (ii) preparing a mixed medium of t-butanol and water using tertiary butyl alcohol and water in a volume ratio of 0.25:1-4:1; (iii) dispersing the graphite oxide precursor in the mixed medium of t-butanol and water to obtain a mixed solution, where greater than or equal to 50 ml of mixed medium is added to 1 g of graphite oxide; and (iv) subjecting the mixed solution to vacuum freeze-drying process, where the freeze-drying temperature is -55 to -10 degrees C, freezing chamber pressure is 20-50 Pa, and the freeze-drying sublimation time is less than 48 hours.