Sensitive detection of H₂O₂ based on a MWCNTs/Ti₃C₂ nanocomposite-modified electrode

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Developing advanced nanomaterials is crucial for sensitive electrochemical sensing applications.
• Carbon-based nanomaterials, like multi-walled carbon nanotubes (MWCNTs), offer excellent electrical conductivity.
• Two-dimensional transition metal carbides (MXenes), such as Ti3C2, possess unique electrochemical properties.

Purpose of the Study:

• To synthesize and characterize novel MWCNTs/Ti3C2 nanocomposites.
• To develop a highly sensitive and stable electrochemical sensor for hydrogen peroxide (H2O2) detection.
• To evaluate the sensor's performance, including its linear range, detection limit, anti-interference capability, and reproducibility.

Main Methods:

• Synthesis of MWCNTs/Ti3C2 nanocomposites using a convenient method.
• Characterization of the nanocomposites' structure and properties via Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FT-IR), and X-ray Photoelectron Spectroscopy (XPS).
• Electrochemical characterization and performance evaluation of the developed sensor using electrochemical techniques.

Main Results:

• The MWCNTs/Ti3C2 nanocomposites exhibited favorable structural and electrochemical properties.
• The developed electrochemical sensor demonstrated excellent electrocatalytic performance for H2O2.
• The sensor achieved a wide linear detection range of 0.05–1080 μM for H2O2, with a low detection limit of 0.017 μM (S/N = 3).

Conclusions:

• The synthesized MWCNTs/Ti3C2 nanocomposites are suitable for constructing high-performance electrochemical sensors.
• The developed sensor shows significant potential for accurate and sensitive H2O2 detection.
• The sensor's strong anti-interference, stability, reproducibility, and good performance in real samples highlight its practical applicability.