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Abstract: In this paper, a cheap, stable, and sensitive chitosan-N-doped graphene oxide (N-RGO) ion-imprinted sensor (IIP-Cd) was studied. The copolymer was deposited on the surface of the glassy carbon electrode (GCE) by the one-step deposition method, and IIP-Cd was obtained after eluted the target ions. XRD, FT-IR, SEM, and EDS were used to characterize the structure and morphology of different materials. The electrochemical properties of IIP-Cd were evaluated by cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. The linear range of the sensor was 0.01-0.1 μM, and the detection limit was 3.51 nM (S/N = 3), and the sensor has high sensitivity, good reproducibility, and well stability. Besides, IIP-Cd still has high selectivity for Cd (II) in mixed ion solution (Zn(II), Hg(II), Cu(II), Cd(II), Mn(II), Ni(III)). The target ion cavity formed in IIP- Cd and the N-RGO as the substrate improves the electron transmission rate of the electrochemical sensor, thus realizing the green, environment-friendly, efficient and sensitive detection with low-cost raw materials in practical application
Template and target information: cadmium ion, Cd(II)
Author keywords: N-doped graphene oxide, chitosan, Electrochemical sensor, Ion-imprinted polymer, Cadmium detection