▎ 摘　　要

NOVELTY - Preparing oxidized graphene, comprises (a) injecting and oxidizing graphite into a Couette-Taylor reactor (100) provided with an outer cylinder (115) and an inner cylinder (114) having the same center and different radius for flowing a fluid according to the rotation of the inner cylinder, and (b) forming oxidized graphene by converting the oxidized graphite into graphene oxide by introducing the oxide graphite into the Couette-Taylor reactor to peel off the oxide graphene, where the oxidized graphene has particle shape of controlled particle size and size distribution. USE - The method is useful for producing oxidized graphene. ADVANTAGE - The method provides oxidized graphene having high quality; and is economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) oxidized graphene having a controlled-sized particle shape produced according to the above method; (2) producing graphene oxide having functional groups, comprising introducing graphite and functional group into the Couette-Taylor reactor through which the fluid flows according to the rotation of the inner cylinder, and peeling and attaching the functional group on the surface; and (3) oxidized graphene having functional groups prepared according to the method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the Couette-Taylor reactor. Couette-Taylor reactor (100) Inlet port (111) Outlet port (112) Inner cylinder (114) Outer cylinder (115)