▎ 摘　　要

NOVELTY - Preparing chiral sulfur and nitrogen co-doped graphene quantum dots comprises using ultrapure water as solvent, nitrogen-doped graphene quantum dots and cysteine as reaction substrates, N-hydroxysuccinimide as dehydrating agent, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide as a crosslinking agent, then carrying out amide reaction at room temperature, purifying and freeze-drying. USE - The method is useful for preparing chiral sulfur and nitrogen co-doped graphene quantum dots. ADVANTAGE - The method: can covalently graft through an amide reaction; is simple, and economical; has mild conditions; and provides new idea for the preparation of chiral carbon nanomaterials. The dots: has uniform size, and has stable chiral signals.