▎ 摘　　要

NOVELTY - Modifying graphene surface by photochemical reaction involves washing copper foil with 0.1-0.5 mmol/L dilute hydrochloric acid and then with deionized water for 2 minutes. The copper foil is ultrasonically cleaned for 10 minutes and then placed in closed quartz tube at less than or equal to 0.1Pa. The flow rate of hydrogen is controlled at 2-4 mL/minute and then copper foil is heated to 1000-1050 degrees C for 5-10 minutes. The flow rate of methane is controlled at 0.1-0.5 mL/minute for 50-70 minutes. The heating is stopped and temperature is reduced to 200 degrees C. The quartz tube is filled with argon. USE - Method for modifying graphene surface by photochemical reaction (claimed). ADVANTAGE - The method enables to modify graphene surface by photochemical reaction in simple, eco-friendly and cost-effective manner. DETAILED DESCRIPTION - Modifying graphene surface by photochemical reaction involves washing copper foil with 0.1-0.5 mmol/L dilute hydrochloric acid and then with deionized water for 2 minutes. The copper foil is ultrasonically cleaned for 10 minutes and then placed in closed quartz tube at less than or equal to 0.1Pa. The flow rate of hydrogen is controlled at 2-4 mL/minute and then copper foil is heated to 1000-1050 degrees C for 5-10 minutes. The flow rate of methane is controlled at 0.1-0.5 mL/minute for 50-70 minutes. The heating is stopped and temperature is reduced to 200 degrees C. The quartz tube is filled with argon and copper foil is removed from surface of graphene. The spin coating is carried out at a speed of 2000 revolutions per minute. The 4 wt.% polymethyl methacrylate is added to chlorobenzene solution for 15 minutes at 80-120 degrees C. The graphene is heated to 85 degrees C-95 degrees C and then soaked in 1 mole/L aqueous solution of ferric chloride until copper foil completely disappears. The openings in the tape are washed three times with deionized water and then placed on surface of graphene. The opening of tape is cut to obtain graphene and polymethyl methacrylate film. The temperature is maintained at 80-120 degrees C for 10-15 minutes. The graphene is soaked in acetone to remove the polymethyl methacrylate film. The reactant solution is added dropwise to graphene and then laser is focused to carry out photochemical reaction. The graphene is finally washed with acetone or ethanol to obtain product.