▎ 摘　　要

NOVELTY - Preparing aluminum/reduced graphene oxide/silver nano composite film comprises (1) etching the aluminum sheet as substrate in sodium hydroxide solution, water washing, drying, soaking in graphene oxide dispersion, taking out, washing with water, drying to obtain aluminum/graphene oxide (Al/GO) composite film; (2) immersing the substrate treated in the step (1) in silver nitrate solution, taking out, water washing, drying it to obtain aluminum/graphene oxide/silver(+1) cation (Al/GO/Ag+) composite film; and (3) carrying temperature programming to heat the substrate obtained in the step (2) under protection of nitrogen, after the heat preservation, naturally cooling to room temperature to obtain aluminum/reduced graphene oxide/silver composite film. USE - The composite film is useful for detecting malachite green and catalytically degrading malachite green (claimed). ADVANTAGE - The composite film: has detection function; and can exhibits good catalytic degradation performance for malachite green; and has high strength, good toughness and high sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the aluminum/reduced graphene oxide/silver nano composite film is prepared by above mentioned method.