CoS₂-decorated ionic liquid-functionalized graphene as a novel hydrazine electrochemical sensor

Area of Science:

• Materials Science
• Electrochemistry
• Analytical Chemistry

Background:

• Ionic liquid-functionalized graphene offers unique properties for electrochemical applications.
• Cobalt disulfide is a promising material for electrocatalysis.

Purpose of the Study:

• To synthesize and characterize cobalt disulfide-decorated ionic liquid-functionalized graphene nanocomposites.
• To develop a highly sensitive and selective electrochemical sensor for hydrazine detection.

Main Methods:

• Nanocomposite synthesis and characterization using SEM, TEM, XRD, FT-IR, and XPS.
• Fabrication of a modified glassy carbon electrode for electrochemical sensing.
• Electrochemical evaluation using cyclic voltammetry and amperometric methods.

Main Results:

• The nanocomposite material was successfully synthesized and characterized.
• The sensor showed a linear response to hydrazine over wide concentration ranges (5-400 μM).
• A low detection limit of 0.39 μM was achieved with good sensitivity, reproducibility, and selectivity.

Conclusions:

• The developed sensor demonstrates excellent performance for hydrazine detection.
• The sensor was successfully applied to determine hydrazine in real lake water samples with satisfactory recovery.
• This work highlights the potential of functionalized graphene nanocomposites in electrochemical sensing applications.