Eco-Friendly Electrochemical Sensor for Accurate Soil Nitrate Detection using ZnOx/PANI Nanocomposite on Nickel Foam Electrode   

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ABSTRACT

This study presents an innovative approach to enhancing nitrate detection in soil, a critical macronutrient for agriculture. We developed a novel electrochemical sensor using a nanocomposite of Zinc Oxide (ZnOx) and Polyaniline (PANI) on a Nickel foam electrode. The nanocomposite was synthesized through cyclic voltammetry and characterized using Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive Spectroscopy (EDS), and X-ray Diffraction (XRD) to analyze its morphological, elemental, and crystalline properties. The sensor’s performance was evaluated using square wave voltammetry, revealing a direct linear relationship between the peak current and nitrate concentration. The sensor demonstrated high sensitivity (4.53 µA/µM) and a low detection limit (0.40 µM), confirming its potential for precise and sensitive nitrate analysis in soil samples.

Significance of the study:

This study introduces a highly sensitive and eco-friendly electrochemical sensor for detecting soil nitrate, essential for agriculture. By utilizing a ZnOx/PANI nanocomposite on a Nickel foam electrode, the sensor achieves high sensitivity and a low detection limit. This advancement holds significant potential for precise nitrate management, enhancing crop yields, and preventing environmental damage due to over-fertilization.

Summary of the study:

An innovative electrochemical sensor for soil nitrate detection was developed using a ZnOx/PANI nanocomposite on a Nickel foam electrode. Characterized by different techniques, the sensor showed high sensitivity (4.53 µA/µM) and a low detection limit (0.40 µM). Optimized for various parameters, this sensor provides accurate nitrate measurements, offering significant benefits for agriculture, water quality monitoring, and environmental sustainability.