▎ 摘　　要

NOVELTY - Preparing electrode composite material involves preparing and obtaining tin oxide (SnO2) nanoparticles by a sol-gel method, then adding reduced graphene oxide (RGO), and then calcining under nitrogen atmosphere to obtain rGO/SnO2composite material. The molybdenum sulfide (MoS2) is synthesized by hydrothermal method. The rGO/SnO2and the MoS2are dispersed in the ethanol-water mixture in proportion, and annealed to obtain the SnO2/rGO/MoS2composite material. The SnO2/rGO/MoS2sample dispersed in an organic solvent, and then added gold (Au) nanoparticles in proportion, under an inert atmosphere. The sample is irradiated with a xenon lamp and stirred to obtain the Au-modified SnO2/rGO/MoS2composite material. USE - Method for preparing electrode composite material used in the hydrogen sulfide (H2S) electrochemical sensor. ADVANTAGE - The method uses a xenon lamp to improve the adhesion deposition effect and photocatalytic efficiency of Au, and the composite material is used for H2S electrochemical sensors, which have high sensitivity at low temperature and faster and more significant response.