Synthesis of copper chromite nanocomposites for electrochemical sensor application

Abstract

The Copper Chromite Nanocomposites (CuCr2O4 Nanoparticles) was synthesised through hydrothermal technique. Several methods, including UV–visible, powder X-ray diffraction and Fourier transform infrared spectroscopy were employed to characterise the produced CuCr2O4 Nanocomposites. Field emission scanning electron microscopy was used to examine the morphology. The CuCr2O4 nanocomposites modified carbon paste electrode (CuCr2O4 Nanocomposites MCPE) was prepared by combining synthesised CuCr2O4 nanocomposites with carbon paste electrode (CPE) as electrochemical sensor for paracetamol (PC). The cyclic voltammetric technique was used to study experimental studies such as scan rate, concentration, pH and real sample analysis. The CuCr2O4 Nanocomposites MCPE showed an improved electrocatalytic response to PC oxidation. The over potential for oxidation of PC was greatly lowered as compared to bare carbon paste electrode (BCPE), which considerably enhanced the current responsiveness on the CuCr2O4 Nanocomposites MCPE. Scan rate study for PC discusses the process of the electrode was controlled by diffusion. CuCr2O4 Nanocomposites MCPE achieved a linear calibration curve with the range of 5 ​μM to 40 ​μM having the low detection limit and quantification limit values 2.7 ​μM and 9.2 ​μM, respectively. This research demonstrates that the electrochemical oxidation of PC at CuCr2O4 Nanocomposites MCPE is a pH dependent process. CuCr2O4 Nanocomposites MCPE was employed to detect PC in real samples with satisfactory results and high accuracy.

Keywords

• Copper chromite nanocomposites MCPE
• Paracetamol
• Hydrothermal method
• Powdered X-ray diffraction
• Field emission scanning electron microscopy