▎ 摘　　要

NOVELTY - Preparation of large layer of graphene oxide with potassium perchlorate comprises reacting concentrated sulfuric acid, concentrated nitric acid and graphite to obtain graphite interlayer compound, heating in microwave for expansion, re-treating with strong acid to obtain graphene oxide, and subjecting to potassium perchlorate oxidation stripping. USE - Method for preparing large layer of graphene oxide with potassium perchlorate (claimed). ADVANTAGE - The method has simple operation and low cost, and it is suitable for massive production of graphene oxide.