▎ 摘　　要

NOVELTY - Preparing graphene composite material involves adding sulfuric acid into de-ionized water, where ratio of sulfuric acid and water is 0.06, cooling to room temperature to obtain electrolytic solution, adding electrolyte sample in the electrolytic bath, using rectifier for providing power supply. The current density is 1.8 A/cm2. The high pure graphite rod is used as anode, platinum as cathode. The two electrode distance is 3 cm. The continuous electrolysis is carried out for 4 hours, filtered, washed with mild de-ionized water for 3 times, after ultrasonic dispersed for 1 hour in ethanol, centrifuged to 4500-5500 revolution per minute speed. The sample is dried at 60 degrees C in vacuum for 1 hour to obtain graphene. The water, concentrated nitric acid, absolute ethyl alcohol are added in ratio 3:1:30 to prepare A solution. The graphene is added in A solution with absolute ethyl alcohol and acetic acid in ratio 8:15:1 to prepare B solution. USE - Method for preparing graphene composite material. ADVANTAGE - The method enables to prepare graphene composite material that has good conductivity and absorption performance, and improves photo-catalytic degradable performance. DETAILED DESCRIPTION - The A solution is added to rotate in the B solution, sealed under stirring for 52 hours into solidification state at 80 degrees C after drying. The tubular furnace to carry out calcining under nitrogen protection. The heating rate is controlled at 300 degrees C with 10 degrees C/minutes rate. The mixture is heated at 300-450 degrees C with 8 degrees C/minutes, and calcined at 450 degrees C for 2 hours to obtain grapheme composite material.