One-Step Electrodeposition Synthesized Aunps/Mxene/ERGO for Selectivity Nitrite Sensing

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Nitrite is an important analyte in environmental and biological samples.
• Developing sensitive and selective electrochemical sensors is crucial for accurate nitrite detection.

Purpose of the Study:

• To prepare a novel nanocomposite material (AuNPs/MXene/ERGO) for electrochemical nitrite detection.
• To evaluate the performance of the fabricated sensor for nitrite analysis.

Main Methods:

• Facile one-step electrodeposition of gold nanoparticles (AuNPs) onto a MXene/ERGO modified glassy carbon electrode (GCE).
• Characterization of the nanocomposite using SEM, EDS, and XRD.
• Electrochemical detection of nitrite using cyclic voltammetry and chronoamperometry.

Main Results:

• The AuNPs/MXene/ERGO/GCE exhibited a well-defined oxidation peak for nitrite at +0.83 V.
• The sensor showed excellent sensitivity with linear ranges from 0.5 to 80 μM and 80 to 780 μM.
• Achieved low limits of detection (LOD) of 0.15 μM and 0.015 μM, with high sensitivity.

Conclusions:

• The developed AuNPs/MXene/ERGO nanocomposite is a highly effective material for sensitive and selective electrochemical nitrite detection.
• The sensor demonstrates good repeatability, long-term stability, and satisfactory performance in real samples.
• Future work should focus on further material optimization for enhanced performance.