▎ 摘　　要

NOVELTY - Graphene comprises 5-35 wt.% expandable graphite, 20-85 wt.% N-methylpyrrolidone, 1-35 wt.% sodium dodecyl benzene sulfonate, and 10-60 wt.% ethanol, where the total content of each component is 100%. USE - Used as graphene. ADVANTAGE - The method produces graphene with high quality and high yield, so it is good for large scale industrial production; has wide application prospect; uses economical raw material; and has simple preparation technology. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also preparing graphene, comprising (i) weighing each raw material, (ii) adding the raw material in a container, mixing and stirring the raw material uniformly, (iii) placing the uniformly mixed raw materials into a micro-wave oven, microwave heating, where the heating power is 500-1000 W, heating time is 1-30 minutes, (iv) closing the power supply of microwave oven, cooling the product slowly in the microwave oven, and (v) taking out the room temperature cooled product from the microwave oven, then filtering, and drying to obtain graphene product.