▎ 摘　　要

NOVELTY - The preparation method of graphene-bismuth sodium molybdate composite material involves solvothermally reacting graphene, bismuth nitrate, and ethylene glycol to obtain graphene-ethylene glycol-bismuth compound, uniformly dispersing graphene-ethylene glycol-bismuth compound in an aqueous sodium molybdate solution, adding concentrated nitric acid or concentrated hydrochloric acid, adjusting the pH value, and hydrothermally reacting the mixture. USE - Preparation of graphene-bismuth sodium molybdate composite material used as gas-sensitive material (all claimed). ADVANTAGE - The method enables the preparation of graphene-bismuth sodium molybdate composite material by simple process with less energy under mild reaction conditions.