Uric acid detection electrochemical sensor and preparation method and application thereof

The invention provides a uric acid detection electrochemical sensor and a preparation method and application thereof, and belongs to the technical field of uric acid detection. A spiral platinum wire and a saturated calomel electrode are respectively used as a counter electrode and a reference electrode, and a preparation method of the working electrode comprises the following steps: preparing a copper-containing carbon dot, oxidizing in the presence of potassium persulfate to prepare a copper oxide nano-flower carbon dot, then carrying out polydopamine modification on the surface, adding into a graphene oxide ethanol solution, and carrying out ultrasonic treatment to obtain the graphene oxide nano-flower carbon dot. The preparation method comprises the following steps: preparing modified copper oxide nanoflower carbon dots coated with wrinkled graphene oxide through spray drying, dispensing the modified copper oxide nanoflower carbon dots on a Ti/Ni deposited glassy carbon electrode, performing hydrazine hyd