Synthesis of Ag Nanoparticle Doped MnO₂/GO Nanocomposites at a Gas/Liquid Interface and its Application in H₂O₂ Detection

Abstract

Abstract Ag/MnO 2 /GO nanocomposites were synthesized via the method of gas/liquid interface based on silver mirror reaction, and a non‐enzymatic H 2 O 2 sensor was fabricated through immobilizing Ag/MnO 2 /GO nanocomposites on GCE. The composition and morphology of the nanocomposites were studied by energy‐dispersive X‐ray spectroscopy (EDS), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Electrochemical investigation indicated that it exhibited a favorable performance for the H 2 O 2 detection. Its linear detection range was from 3 μM to 7 mM with a correlation coefficient of 0.9960; the sensitivity was 105.40 μA mM −1 cm −2 and the detection limit was estimated to be 0.7 μM at a signal‐to‐noise ratio of 3.