▎ 摘　　要

Gold-modified magnetic graphene(Au@ Fe3O4@ RGO) was used as a carrier to select gold-modified magnetic properties and using surface molecular imprinting technique to select dinbutyl phthalate (DBP) as a template molecule in water environment. Graphene-based molecularly imprinted composite membrane (Au@ Fe3O4@ RGO-MIP ) was prepared and characterized by means of transmission electron microscopy( TEM), X-ray diffraction( XRD) and Fourier transform infrared spectroscopy(FTIR). Au@ Fe3O4@ RGO-MIP was used as the sensitive material for sensor identification components. The performance of molecularly imprinted electrochemical sensors was analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse ( DPV). The results show that the equilibrium time of the molecularly imprinted electrochemical sensor for dinbutyl phthalate in water environment is 6 min. In the concentration range of 0. 01-0. 1 mu mol/L, there is a good linear relationship between DBP concentration and response current. The minimum detection limit is 0. 3049 nmoUL(S/N = 3).