A Nonenzymatic Hydrogen Peroxide Sensor Based on Silver Nanowires and Chitosan Film

Abstract

Abstract A nonenzymatic amperometric electrochemical sensor for the detection of hydrogen peroxide (H 2 O 2 ) was fabricated based on highly dense silver nanowires (Ag NWs) and chitosan (CS) film. Ag NWs were synthesized by a poly(vinyl pyrrolidone) (PVP)‐mediated polyol process in the presence of manganese chloride (MnCl 2 ), and were characterized by scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDS), and X‐ray diffraction (XRD). Under the optimal conditions, the proposed nonenzymatic sensor exhibited good electrocatalytic activity towards the reduction of H 2 O 2 , and could detect H 2 O 2 in the linear range of 0.008–1.35 mM, with a detection limit of 2 µM ( S / N =3).