▎ 摘　　要

A novel and simple approach of using amide salt pyrolysis to produce photoluminescent (multi -excitation and single color emission) graphene nanosheets (GNs) with a thickness of <1 nm and a diam-eter of about 100-200 nm is described herein. It has characteristics of high water solubility, low toxicity, easy manufacturing, etc., and has potential application prospects in analytical chemistry and biomedicine. (c) 2022 Elsevier Inc. All rights reserved.