Dioctylsulfosuccinate Functionalized NiAl-Layered Double Hydroxide for Sensitive Fenuron Electroanalysis Using a...

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Pesticides like fenuron pose health risks due to carcinogenic and teratogenic properties.
• There is a critical need for rapid, cost-effective methods to detect and quantify fenuron.
• Layered double hydroxides (LDHs) offer potential as sensor materials.

Purpose of the Study:

• To develop a novel sensor for fenuron detection.
• To utilize an inorganic-organic composite material based on NiAl-LDH for enhanced sensing capabilities.
• To validate the sensor's performance and applicability in real environmental samples.

Main Methods:

• Synthesis of a NiAl-LDH intercalated with sodium dioctylsulfosuccinate (DSS).
• Characterization of the pristine and modified LDH using FTIR, XRD, and TGA.
• Fabrication of a carbon paste electrode (CPE) modified with the organo-LDH composite for differential pulse voltammetry (DPV) detection of fenuron.

Main Results:

• Successful intercalation of DSS within the NiAl-LDH structure was confirmed.
• The organo-LDH modified CPE showed a twofold increase in fenuron detection signal compared to pristine LDH.
• The sensor achieved a limit of detection (LOD) of 1.8 × 10^-8 mol.L^-1 and was successfully applied to river water samples.

Conclusions:

• The DSS-modified NiAl-LDH composite significantly enhances fenuron detection sensitivity.
• The developed electrochemical sensor is rapid, cost-effective, and suitable for environmental monitoring.
• This approach provides a promising tool for quantifying harmful pesticide residues in water bodies.