▎ 摘　　要

NOVELTY - A graphene aerogel comprises graphene oxide or reduced graphene oxide which is carried on the three-dimensional framework of the carbonized sugar with a single-layer or multi-layer structure. The graphene aerogel has an average pore diameter of 0.1-5.0 mum, a specific surface area of 60-100 m2/g, and a mass content of graphene oxide or reduced graphene oxide of 3-5%. USE - Graphene aerogel with carbonized sugar as three-dimensional framework is used for sensing low-concentration gas. ADVANTAGE - The graphene aerogel raw material is easy to obtain, the obtained aerogel bubbles have uniform pore size distribution, and the distributed graphene is a single layer, and has good gas-sensing performance for low-concentration gas and fast gas adsorption and desorption. The preparation method is simple, has high repeatability, is economical and environmentally-friendly, and is suitable for large-scale industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation of the graphene aerogel of three-dimensional framework with carbonized sugar, which involves (1) after mixing sugar carbon source, graphene oxide and catalyst, adding water, stirring and dissolving, and drying to obtain carbon mixture, and (2) rapidly heating the carbon mixture obtained in step (1) in a flame to expand the pores, and washing.