An Amperometric Sensitive Hydrogen Peroxide Sensor Based on a Silver Nanoparticle-Doped Polyimide-Modified Glassy Carbon Electrode

摘要

We report a novel non-enzymatic sensor for the detection of hydrogen peroxide based on a polyimideand silver nanoparticle composite-modified glassy carbon electrode. The structure and morphology ofthe modified electrode surface were characterized by scanning electron microscopy and atomic forcemicroscopy. The electrochemical performance of the present sensor was evaluated by cyclicvoltammetry and amperometry. Under optimal conditions, the calibration plots are linear in the rangeof 0.01-1 mM, with a detection limit (S/N＝3) of 8.6 ?M. The electrode exhibited high stability, greatsensitivity, stable reproducibility and fast response times (＜ 5 s). These results show that polyimidecan be used as a reliable and long-life sensor for hydrogen peroxide detection, revealing a newapplication for polyimide.