Preparation of a nanocomposite material consisting of cuprous oxide, polyaniline and reduced graphene oxide, and its application to the electrochemical determination of hydrogen peroxide

Abstract

A method is described for the preparation of a nanocomposite material consisting of cuprous oxide/polyaniline/reduced graphene oxide (CuO/PANI/rGO). Aniline was employed as both the precursor for PANI and the reducing agent for Cu and graphene oxide. A glassy carbon electrode was modified with the nanocomposite material. Chronoamperometric studies with the modified electrode showed it to enable an efficient electroreduction of hydrogen peroxide at -0.2 V vs. saturated calomel electrode. All measurements were performed in the absence of oxygen. Figures of merit include a wide linear response range (0.8 μM to 12.78 mM) and a low limit of detection of 0.5 μM (S/N = 3). Graphical abstract Cuprous oxide/polyaniline/reduced graphene oxide nanocomposites were synthesized through one-step process for fabricating an nonenzymatic electrochemical sensor for hydrogen peroxide.

Review—Non-Enzymatic Hydrogen Peroxide Electrochemical Sensors Based on Reduced Graphene Oxide

“…However, increasing the temperature to more than 700 o C can elevate the C/O ratio to 13 and conductivity to more than 100 S/m. 84,85 Most of the H 2 O 2 electrochemical sensors based on thermally reduced GO were heated at temperatures lower than 210 o C, [86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101] and few groups have reported temperatures higher than 800 o C. 92,[102][103][104] Electrochemical reduction of GO.-The reduction of GO can be accomplished by electrochemical methods using two different paths. In the first approach, also known as the one-step method, the GO sheets inside aqueous colloidal suspension are reduced at the electrode directly.…”

“…Also, PANI has been used as a support material for Cu 2 O-rGO-based H 2 O 2 sensing, and aniline was reducing Cu +2 ions and GO at the same time during the polymerization process. 99 Another metal-oxide nanomaterial that has been used to modify the rGO based electrode is ZnO 2 , which was co-electrodeposited with rGO by Palanisamy et al 115 to develop an enzyme-free H 2 O 2 amperometric sensor. Besides, various Cobaltbased nanomaterials have been employed to improve the sensitivity of the H 2 O 2 electrochemical sensors.…”

Recent developments in carbon-based two-dimensional materials: synthesis and modification aspects for electrochemical sensors

“…They provide a suitable substitute to natural enzymes, as they are more stable and are less prone to operation and environmental conditions. Metallic nanoparticles combine easily with carbon materials upon hydrothermal route or by direct electrodeposition onto the substrate of choice [86,124,125,129,132,134,[139][140][141][142][143]. For successful analyte determination upon catalytic reaction, the achievement of homogeneously distributed small metallic NPs exhibiting a large electrical active surface is crucial.…”