Silver nano composite material for rapidly detecting uric acid

The invention relates to the technical field of nano biology, in particular to a silver nano composite material for rapidly detecting uric acid, which is prepared by the following steps: (1) sequentially adding diatomite and deionized water into a round-bottom flask, stirring to completely disperse the diatomite and the deionized water, adjusting the pH value of a suspension by using a sodium hydroxide solution, and heating in a water bath to obtain a diatomite suspension; (2) adding the diatomite suspension and absolute ethyl alcohol into a polytetrafluoroethylene lining, sequentially adding a sodium citrate aqueous solution and an AgNO3 aqueous solution, and stirring to uniformly mix; and putting the lining into a high-pressure kettle, putting the high-pressure kettle into a drying oven, carrying out hydrothermal reaction, cooling to room temperature, carrying out centrifugal separation on reactants, washing and carrying out centrifugal separation on sediments, and drying in a vacuum drying oven to obtain t