▎ 摘　　要

NOVELTY - A composite gas sensing material comprises the material composition, where the material composition is a graphene quantum dot-lanthanum oxide-zinc-iron oxide composite material, the graphene quantum dots account for 0.5-1.5% of the total mass of the material, and the molar ratio of lanthanum oxide to zinc-iron oxide is 2.5-4%. USE - Composite gas sensing material. ADVANTAGE - The composite gas sensing material can be prepared with high selectivity to low concentration acetone, and low sensitivity of common interfering gas. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing composite gas sensing material.