Copper(II) Oxide Nanoparticles Embedded within a PEDOT Matrix for Hydrogen Peroxide Electrochemical Sensing

Abstract

The aim of this study is the preparation of nanostructured copper(II) oxide-based materials (CuONPs) through a facile additive-free polyol procedure that consists of the hydrolysis of copper(II) acetate in 1,4-butane diol and its application in hydrogen peroxide sensing. The nonenzymatic electrochemical sensor for hydrogen peroxide determination was constructed by drop casting the CuONP sensing material on top of a glassy carbon electrode (GCE) modified by a layer of poly(3,4-ethylenedioxythiophene) conducting polymer (PEDOT). The PEDOT layer was prepared on GCE using the sinusoidal voltage method. The XRD pattern of the CuONPs reveals the formation of the monoclinic tenorite phase, CuO, with average crystallite sizes of 8.7 nm, while the estimated band gap from UV–vis spectroscopy is of 1.2 eV. The SEM, STEM, and BET analyses show the formation of quasi-prismatic microaggregates of nanoparticles, with dimensions ranging from 1 µm up to ca. 200 µm, with a mesoporous structure. The developed electrochemical sensor exhibited a linear response toward H2O2 in the concentration range from 0.04 to 10 mM, with a low detection limit of 8.5 μM of H2O2. Furthermore, the obtained sensor possessed an excellent anti-interference capability in H2O2 determination in the presence of interfering compounds such as KNO3 and KNO2.

Recent innovations in the technology and applications of low-dimensional CuO nanostructures for sensing, energy and catalysis

“…A method for the fabrication of hydrogen peroxide sensors using a simple polyol method, where copper oxide particles are produced when copper( ii ) acetate is hydrolyzed in 1,4-butanediol in the absence of additives, was also reported recently. 161 Fig. 22 illustrates the general approach for the synthesis of the copper oxide nanoparticle (CuONP)-based non-enzymatic electrochemical sensor.…”

Non‐enzymatic hydrogen peroxide sensor based on palladium‐decorated poly(thionine) modified glassy carbon electrode

“…Thus, these conditions supported the development of non-enzymatic sensors [16]. Often, non-enzymatic H 2 O 2 sensors are developed using special micro and nanomaterials, including metal and metal alloy nanoparticles [13,17] metal oxides [14,18], conductive polymers [2,18,19], carbon nanotubes [17], and graphene [20]. Among the metal nanoparticle-based H 2 O 2 sensors gold nanoparticles [21] silver nanoparticles [22], platinum nanoparticles [23], and palladium (Pd) nanoparticles [24,25] display advantages such as high catalytic ability, excellent conductivity, and long-term stability.…”

Construction of novel potentiometric sensors modified with biogenically synthesized metal oxide nanoparticles for sensitive detection of the opioid agonist-antagonist nalbuphine hydrochloride in its injection

“…It is a monoclinic crystalline structure metal oxide with phase and a number of impact features such as excellent thermal conductivity, high stability, and antipathogenic potential. CuO has been investigated for various purposes due to its exceptional properties, magnetic applications, sensors, and catalysis [ [38] , [39] , [40] , [41] ].…”