Green Synthesis of CuO-ZnO Nanocomposite using Citrus Sinensis Fruit Peel Extract for Electrochemical Detection of Hydrogen Peroxide

Gudisa, Megersa Gudisa; Deresa, Ebisa Mirete; Gebretsadik, Gebru; Gonfa, Guta; Kitte, Shimeles Addisu

doi:10.22034/abec.2024.713500

Green Synthesis of CuO-ZnO Nanocomposite using Citrus Sinensis Fruit Peel Extract for Electrochemical Detection of Hydrogen Peroxide

Document Type : Original Article

Authors

Megersa Gudisa Gudisa

Ebisa Mirete Deresa

Gebru Gebretsadik

Guta Gonfa

Shimeles Addisu Kitte

Department of Chemistry, College of Natural Sciences, Jimma University, P.O. Box 378, Jimma, Ethiopia

10.22034/abec.2024.713500

Abstract

In this work, CuO nanoparticles (NPs), ZnO NPs, and CuO-ZnO nanocomposites (NCs) were synthesized using Citrus sinensis fruit peel extract. Then, carbon paste electrodes modified with each nanomaterial (CuO-CPE, ZnO-CPE, and CuO-ZnO-CPE) was fabricated for the electrochemical detection of hydrogen peroxide (H2O2). The prepared metal oxide nanomaterials were characterized using Ultraviolet-Visible (UV-Vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The average crystallite sizes for nanomaterials composed of CuO and ZnO NPs and CuO-ZnO NCs were 32.2 nm, 31.7 nm, and 35.38 nm, respectively. A carbon paste electrode modified with CuO-ZnO NCs (CuO-ZnO-CPE) was used to detect H2O2. At CuO-ZnO-CPE, a cathodic peak for H2O2 was seen at about 0.0 V. Under optimum experimental conditions, the developed electrode showed a wide linear range from 0.5 μM to 200.0 μM with a limit of detection (LOD) of about 0.32 μM. The synthesized electrode also showed increased stability, adequate selectivity, and repeatability.

Keywords

Citrus sinensis

CuO nanoparticles

ZnO nanoparticles

CuO-ZnO nanocomposite

Electrochemical detection

Hydrogen peroxide

Subjects