▎ 摘　　要

NOVELTY - Graphene aerogel comprises carbon element, sulfur element, and nitrogen element, where the sulfur element and nitrogen element are each combined with the carbon element in the form of a chemical bond, the density of graphene aerogel is 4-6.5 mg/cm3. USE - Graphene aerogel used as an adsorption material for offshore oil spill treatment (claimed). ADVANTAGE - The graphene aerogel has better adsorption performance, good hydrophobic and oil-water selectivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a graphene aerogel, which involves uniformly mixing the graphene oxide dispersion with a reducing agent and a crosslinking agent, performing a hydrothermal reaction to obtain a graphene hydrogen, removing the solvent in the graphene hydrogel to obtain the graphene aerogel, where the crosslinking agent is cysteamine and/or L-cysteine.