A new voltammetry sensor platform for eriocitrin based on CoS₂-MoS₂-PDDA-GR nanocomposite

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Developing sensitive electrochemical sensors is crucial for detecting bioactive compounds.
• Nanocomposite materials offer unique properties for enhanced sensor performance.

Purpose of the Study:

• To synthesize and characterize a novel nanocomposite material (CoS2-MoS2-PDDA-GR).
• To establish a sensitive electrochemical method for eriocitrin determination using the synthesized nanocomposite.
• To evaluate the sensor's performance and applicability in real samples.

Main Methods:

• Synthesis of CoS2 Nanoparticles and MoS2 Nanosheets decorated poly(diallyldimethylammonium chloride)-functionalized graphene (CoS2-MoS2-PDDA-GR).
• Characterization using X-ray diffraction (XRD), Transmission electron microscopy (TEM), Electrochemical impedance spectroscopy (EIS), and Cyclic voltammetry (CV).
• Electrochemical determination of eriocitrin using Differential Pulse Voltammetry (DPV) on a modified glassy carbon electrode.

Main Results:

• The CoS2-MoS2-PDDA-GR nanocomposite exhibited a larger effective surface area and more reactive sites.
• A sensitive detection method for eriocitrin was established with a linear concentration range from 2.0 × 10⁻⁹ to 1.0 × 10⁻⁶ mol L⁻¹.
• The sensor achieved a low detection limit of 6.7 × 10⁻¹⁰ mol L⁻¹ (S/N=3).
• Successful application in detecting eriocitrin in real samples with satisfactory results.

Conclusions:

• The CoS2-MoS2-PDDA-GR nanocomposite provides an excellent platform for sensitive electrochemical sensing.
• The developed method is highly effective for the quantitative determination of eriocitrin.
• This sensor demonstrates practical applicability for analyzing eriocitrin in complex matrices.