Electrodeposition of nickel oxide and platinum nanoparticles on electrochemically reduced graphene oxide film as a nonenzymatic glucose sensor

Abstract

We report the facile electrochemical fabrication of NiO nanoparticles (NPs)/Pt NPs/electrochemically reduced graphene oxide (NiO/Pt/ERGO) ternary composite modified electrode. The NiO/Pt/ERGO film was characterized by scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectrometry (EDS), atomic force microscopy (AFM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) measurements reveal that NiO/Pt/ERGO can directly catalyze the oxidation of glucose and display enhanced current responses. This nonenzymatic sensor shows an excellent sensitivity of 668.2μAmM−1cm−2 (476mM−1cm−2), a linear range of 0.05–5.66mM (R=0.9996), a fast response time (2.5s), and a low detection limit (S/N ratio=3) of 0.2μM in alkaline medium. The nonenzymatic glucose sensor also exhibits superior stability and good anti-interference properties. The electrochemical detection results demonstrate that NiO/Pt/ERGO/GCE is a good candidate for glucose quantification.