Octahedral Cuprous Oxide Decorated Flexible Reduced Graphene Oxide Paper for Food Sensing Application

Abstract

Abstract This work presents a simple method to fabricate an octahedral cuprous oxide (Cu 2 O) decorated two‐dimensional (2D) flexible rGOP electrode with filtration and electrodeposition strategies. The characteristic of the Cu 2 O/rGOP electrodes was recorded by SEM, EDX, XPS, XRD, and Raman spectroscopy. The results clearly showed that Cu 2 O was successfully electrodeposited on the surface of rGOP by controlling the electrodeposition potential without the introduction of any template or surfactant. The electrochemical characterizations of the Cu 2 O/rGOP exhibited high electrocatalytic activity toward the reduction of H 2 O 2 . The linear detection range for the Cu 2 O/rGOP flexible sensor was 5.0 μM to 5.5 mM, with a limit of detection of 1.27 μΜ. Subsequently, the developed flexible rGOP sensor was extended for H 2 O 2 detection in milk samples for avoiding milk spoilage . Such judicial preparation of rGOP as a sensing device will certainly pave the way for various other sensing applications including environmental and biomedical applications.