Electrodeposition method synthesise gold nanoparticles–Prussian blue–graphene nanocomposite and its application in electrochemical sensor for H2O2
Gold nanoparticles–Prussian blue–graphene (GNPs–PB–Gr) nanocomposites were successfully synthesised by a simple one-step electrodeposition method. Using those GNPs–PB–Gr nanocomposites, a simple H2O2 amperometric sensor has been fabricated (GNPs–PB–Gr/glassy carbon electrode (GCE)) and evaluated by electrochemical impedance spectroscopy, cyclic voltammetry and typical amperometric method. When applied to detect H2O2 by amperometric method, GNPs–PB–Gr/GCE produced an ultrahigh sensitivity of 33.86 µA/mM with a low detection limit of 1.5 µM (signal-to-noise ratio (SNR)=3). What is more, interference from common co-existing species, such as uric acid and ascorbic acid, can be avoided at the sensor. The results obtained in this Letter imply that GNPs–PB–Gr nanocomposites are promising nanomaterials for the determination of H2O2.
