Cost-Effective Voltammetric Assay Based on Modified Screen Printed Carbon Electrode for Determination of ۴-Aminophenol

This study presents the development of a sensitive electrochemical sensor utilizing a nanocomposite of multi-walled carbon nanotubes (MWCNTs) with a zeolitic imidazolate framework (ZIF) containing cobalt (Co) composite modified screen-printed electrode (SPE) for the recognition and detection of ۴-aminophenol (۴-AP). The sensor was fabricated using a simple drop-coating method, resulting in enhanced electrochemical performance characterized by high sensitivity, low detection limit (LOD), and excellent selectivity. The sensor demonstrated a peak current sensitivity of ۰.۰۶۰۴ μA.μM-¹ and a LOD of ۰.۰۲ µM for ۴-AP. The exceptional performance is attributed to the unique properties of the MWCNTs/ZIF (L) (Co) composite, such as a low charge transfer resistance, and a high density of active sites. The sensor's effectiveness was further validated through its application in detecting trace levels of ۴-AP in water samples, showcasing its potential for environmental monitoring and diagnostics.

کلیدواژه ها:

Multi-walled carbon nanotubes ، Zeolitic imidazolate framework containing cobalt ، screen-printed electrode ، ۴-aminophenol