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Atomically thin cobalt telluride (CoTe2) effectively detects mancozeb (MNZ) pesticide residues using combined spectroscopic and electrochemical methods. This 2D material offers a sensitive and selective platform for monitoring food safety and environmental contamination.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Environmental Science

Background:

  • Pesticides are vital for agriculture but pose risks to health and environment.
  • Accurate pesticide detection is crucial for food safety and environmental monitoring.
  • Existing detection methods require improvement in sensitivity and selectivity.

Purpose of the Study:

  • To develop a novel sensing platform for detecting mancozeb (MNZ) pesticide.
  • To utilize two-dimensional cobalt telluride (2D CoTe2) as a sensing material.
  • To investigate the synergistic effects of spectroscopic and electrochemical techniques for MNZ detection.

Main Methods:

  • Synthesis and characterization of atomically thin 2D CoTe2.
  • Spectroscopic analysis (e.g., FTIR, Raman) to study MNZ-CoTe2 interactions.
  • Electrochemical studies using a CoTe2/GCE electrode for MNZ electrooxidation.
  • Density Functional Theory (DFT) calculations to elucidate interaction mechanisms.

Main Results:

  • 2D CoTe2 exhibited distinct spectral shifts upon interaction with MNZ.
  • The CoTe2/GCE electrode showed enhanced electrochemical activity for MNZ detection.
  • Achieved a linear detection range from 0.184 mM to 18.48 μM with a limit of detection of 0.18 μM.
  • DFT calculations validated experimental findings and explained the interaction mechanism.

Conclusions:

  • 2D CoTe2 serves as an effective dual-mode sensing platform for qualitative and quantitative MNZ analysis.
  • The integration of spectroscopy and electrochemistry with 2D CoTe2 enhances pesticide detection capabilities.
  • This approach offers a promising tool for agricultural safety and environmental monitoring of pesticide residues.