▎ 摘　　要

NOVELTY - Preparing graphene oxide/nano-precious metal composite material, comprises: (1) reducing salt of precious metal to obtain noble metal solution using liquid phase reduction method; (2) dispersing graphene oxide into alcohol solution and silane coupling agent and then reacting at 25-70 degrees C, washing and separating the reaction product to obtain graphene oxide material; and (3) dispersing the obtained material into water and then uniformly mixing with the precious metal solution, and washing and separating the product. USE - The method is useful for preparing graphene oxide/nanometer precious metal composite material (claimed). ADVANTAGE - The material has better water solubility and large surface area, and improves ultra-sensitive detection rate of target molecules in water. DETAILED DESCRIPTION - Preparing graphene oxide/nanometer precious metal composite material with surface enhanced Raman effect, comprises: (1) reducing salt of precious metal to obtain noble metal solution using liquid phase reduction method; (2) dispersing graphene oxide into alcohol solution and silane coupling agent and then reacting at 25-70 degrees C, washing and separating the reaction product to obtain graphene oxide material grafted by alkene coupling agent, where the silane coupling agent has a structure of formula (Y1(CH2)nSi(OR)3); and (3) dispersing the obtained material into water and then uniformly mixing with the precious metal solution, and washing and separating the product after the metal nanoparticles in the surface of the graphene oxide reaches an equilibrium position. Y1 = amine, sulfhydryl or carboxylic acid; n = 1-10; and R = 1-5C alkyl.