Au NPs–Ni(OH)2–Cu nanocomposites enhanced electrochemical properties for detection of H2O2

摘要

Ni(OH)2nanoplatesgrownonCusubstrateweresynthesizedbyasimplehydrothermalmethod.AunanoparticlesweredroppedontoNi(OH)2nanoplatesaccordingtooptimalratiotogetAuNPs–Ni(OH)2–Cunanocomposites.Thesewerecharacterizedbyscanningelectronmicroscopy(SEM),X-raypowderdiffraction(XRD),transmissionelectronmicroscopy(TEM)andX-rayenergydispersivespectrometer(EDS).Theelectrode(AuNPs–Ni(OH)2–Cu/glassycarbonelectrode)constructedbythecompositeswasevaluatedbyelectrochemicalimpedancespectroscopy(EIS),cyclicvoltammetry(CV),andtypicalamperometricresponse(i-t).Itswidelinearrangecovered2.5μMto1229.5μMforthedetectionofperoxidehydrogen(H2O2),theoptimizeddetectionlimit0.3μM(S/N=3)andtheresponsetimewaslessthan3s.Besides,theproposedelectrodeshowedsatisfactoryselectivity,andgoodstability...