▎ 摘　　要

NOVELTY - Preparing high purity single crystal graphene in large scale comprises (i) preparing silk fibroin solution; (ii) dropping the silk fibroin solution on the quartz sheet, spin coating by spin coater, drying, repeating operation for 10 times to obtain the film and drying the film to obtain macromolecule carbon-containing organic film; (iii) placing the quartz sheet and high molecular carbon-containing organic film in the reaction cavity, and using microwave plasma technology to process the high molecular carbon containing organic film to obtain powder; and (iv) calcining the powder in the vacuum furnace under the vacuum condition, naturally cooling to room temperature and taking out to obtain high purity single crystal graphene. USE - The method is useful for preparing high purity single crystal graphene in large scale. ADVANTAGE - The method avoids the safety problems caused by the widespread use of gas as a carbon source, and does not cause pollution caused by the product graphene.