ELECTROCHEMICAL SENSOR AND PREPARATION METHOD THEREFOR AND USE THEREOF IN DETECTING GINSENOSIDE RG3

An electrochemical sensor and a preparation method therefor and the use thereof in detecting ginsenoside Rg3. A electrochemical sensor comprises an electrode, a composite material attached to the surface of the electrode and a molecularly imprinted polymer, wherein the composite material is a composite of multi-walled carbon nanotubes and titanium carbide, and the template of the molecularly imprinted polymer is ginsenoside Rg3. The preparation method therefor comprises adding multi-walled carbon nanotubes and titanium carbide to a solvent containing diethylene glycol diacrylate phthalate for compounding, so as to obtain a composite material of multi-walled carbon nanotubes, titanium carbide and diethylene glycol diacrylate phthalate, and modifying the surface of the electrode by using the composite material to form a modified electrode; using o-phenylenediamine as a functional monomer and ginsenoside Rg3 as a template molecule, and performing electropolymerization on the surface of the modified electrode to