▎ 摘　　要

NOVELTY - Preparing silver-platinum-graphene oxide (Ag-Pt-rGO) nanocomposites involves weighing graphene oxide in distilled water and stirring ultrasonically for 2 hours to obtain a graphene oxide solution with a concentration of 1 mg/mL for use. A silver nitrate solution prepare with a concentration of 0.1 mol/L. A potassium chloroplatinate solution prepare with a concentration of 0.01 mol/L. An equal volume of silver nitrate solution mix with potassium chloroplatinate solution, add to graphene oxide solution after 30 minutes of sonication, and Ag-Pt-rGO nanocomposites were obtained after 3 hours of ultraviolet light irradiation. USE - Method for preparing silver-platinum-graphene oxide (Ag-Pt-rGO) nanocomposites used for the preparation and detection of catechol sensors. ADVANTAGE - The method enables to prepare silver-platinum-graphene oxide (Ag-Pt-rGO) nanocomposites has excellent performance.