Ion-Imprinted Polymers Modified Sensor for Electrochemical Detection of Cu2+

Abstract

An electrochemical sensor (Cu[Formula: see text]-IIPs/GCE) was developed for detection of Cu[Formula: see text] in water. Cu[Formula: see text]-IIPs/GCE was prepared by dispersing Cu[Formula: see text] imprinted polymers (Cu[Formula: see text]-IIPs) on a preprocessed glassy carbon electrode. Cu[Formula: see text]-IIPs were synthesized on the surface of modified carbon spheres by ion imprinting technology. The electrochemical performance of Cu[Formula: see text]-IIPs/GCE was evaluated by differential pulse voltammetry method. The response of Cu[Formula: see text]-IIPs/GCE to Cu[Formula: see text] was linear in [Formula: see text][Formula: see text]mol/L to [Formula: see text][Formula: see text]mol/L. The detection limit was [Formula: see text][Formula: see text]mol/L ([Formula: see text]). The current response value of Cu[Formula: see text]-IIPs/GCE was 2.14 times that of the nonimprinted electrode. These results suggest that Cu[Formula: see text]-IIPs/GCE can detect the concentration of Cu[Formula: see text] in water, providing a new way for heavy metal ions adsorption and testing.