▎ 摘　　要

NOVELTY - Graphene oxide is provided as raw material, annealed, and subjected to graphene oxide reduction treatment. The product is mixed with xenon difluoride, placed in sealed Teflon (RTM: polytetrafluoroethylene) cup, cup is placed in stainless steel Teflon (RTM: polytetrafluoroethylene) outer tank and stainless steel tank is sealed. The tank is placed in drying box, dried, and cooled, to obtain fluorinated graphene. The fluorinated graphene is supplied into tube furnace, ammonia gas is passed, heated, and cooled, to obtain nitrogen-doped infrared fluorescent graphene. USE - Preparation of nitrogen-doped infrared fluorescent graphene (claimed). ADVANTAGE - The method enables preparation of nitrogen-doped infrared fluorescent graphene having adjustable fluorescence peak position. The peak adjusted to 665-847 nm. DETAILED DESCRIPTION - Graphene oxide is provided as raw material, maintained at 700 plus minus 30 degrees C under stream of argon, annealed for 1-3 hours, and subjected to graphene oxide reduction treatment. The resulted product is mixed with xenon difluoride, placed in sealed Teflon (RTM: polytetrafluoroethylene) cup, cup is placed in stainless steel Teflon (RTM: polytetrafluoroethylene) outer tank and stainless steel tank is sealed. The stainless steel outer tank is placed in drying box, dried at 200 plus minus 10 degrees C constant temperature for 24-48 hours, and cooled to room temperature, to obtain fluorinated graphene. The fluorinated graphene is supplied into tube furnace, ammonia gas is passed, and heated at 400-900 degrees C, and at 500 plus minus 30 degrees C constant temperature for 2-5 hours. The resulted product is naturally cooled to room temperature, to obtain nitrogen-doped infrared fluorescent graphene. The mass ratio of reduced graphene oxide and xenon difluoride is 1:5-1:20.