Facile green synthesis of zinc oxide nanoparticles: Its photocatalytic and electrochemical sensor for the determination of paracetamol and D-glucose

Environmental Functional Materials Pub Date : 2023-08-01 DOI:10.1016/j.efmat.2024.01.002

B. Avinash , C.R. Ravikumar , N. Basavaraju , Buzuayehu Abebe , T. Naveen Kumar , S.N. Manjula , H.C. Ananda Murthy

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Abstract

The nanocrystalline zinc oxide (ZnO) was produced utilizing a bio-combustion process with Aloe vera latex extract (Avle) as the fuel. The XRD method proved the nanocrystalline nature and phase of ZnO. The Kubelka-Monk (K-M) function was used to analyze the DRS-UV-vis spectrum, and the results revealed that ZnO has a band gap of 2.79 eV. When utilized to evaluate the photo-degradation capabilities of ZnO, the acid red-88 (AR-88) dye was found to be activated at 500 nm. After 120 min of exposure to UV radiation, the AR-88 dye's photodegradation rate reduced its hue by up to 75.8%. A carbon paste electrode that had been enhanced with ZnO nanoparticles (NPs) was used to detect paracetamol and D-glucose in a 1 M KOH solution. The result of the cyclic voltammetry points to the excellent electrochemical qualities of ZnO NPs. ZnO electrode material was found to have a proton diffusion coefficient of 9.30 × 10⁻⁵cm²s⁻¹. ZnO is a decent electrode catalyst for sensing chemicals like paracetamol and glucose, according to its electrochemical behavior.

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