▎ 摘　　要

NOVELTY - The method involves providing grind waste tire into tire powder. The tire powder and nano-nickel powder are grinded and mixed to obtain first mixed powder. The first mixed powder is roasted in two stages of microwave in a nitrogen atmosphere and cooled to room temperature. The first mixed powder is sieved to obtain the second mixed powder. The second mixed powder is added to dilute hydrochloric acid for ultrasonic washing.The second mixed powder is washed with deionized water until the washing liquid is neutral and dried to obtain graphene. The mass ratio of the tire powder to the nano nickel powder in the 3: 2-1. The microwave first-stage roasting temperature is provided in 150-250degrees Celsius and the time is provided in 20-40 min. The roasting temperature of the second microwave stage is provided in 800-1000 degrees Celsius and the roasting time s provided in 2-4 h. USE - Method for preparing graphene from waste tire. ADVANTAGE - The method uses nano nickel powder as catalyst under the action of microwave catalyzing waste tire graphitization to generate graphene, thus reducing the particle size and improving the uniformity of the particles size. The method provides porous graphene, porous structure that can improve the material transportation efficiency. The hole of atom level screens the ion or molecule of different size, thus effectively opening the energy band gap of the graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation of an X-ray diffraction (XRD) pattern of graphene.