کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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745258 | 1462112 | 2013 | 8 صفحه PDF | دانلود رایگان |
Graphene oxide (GO) has functionalized with aminothiophenol (ATP) and covalently bonded to the palladium (Pd) nanoparticles (NPs) via sulfur atom. The GO–ATP–Pd was electrochemically reduced to graphene oxide (ERGO) at a potential range of 0 to −1.5 V, and was used in electrochemical biosensing for hydrogen peroxide (H2O2). The ERGO–ATP–Pd-modified electrode showed the advantages of excellent electrocatalytic activity toward H2O2 in PBS solution. The ERGO–ATP–Pd was characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS) and electrochemical impedance spectroscopy (EIS). Cyclic voltammetry (CV) and chronoamperometry (CA) were used to characterize the performance of the biosensor. The proposed H2O2 biosensor exhibited a wide linear range from 0.1 μM to 10 mM, and a low detection limit of 0.016 μM (S/N = 3), with a fast response time of less than 10 s. The biosensor, therefore, demonstrated excellent capability for the analysis of H2O2.
Journal: Sensors and Actuators B: Chemical - Volume 178, 1 March 2013, Pages 450–457