Ultralow Detection of Mancozeb Using Two-Dimensional Cobalt Telluride (CoTe₂)

Surbhi Slathia ¹, Bruno Ipaves ², Caique Campos de Oliveira ²

⁰School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.

Langmuir : the Acs Journal of Surfaces and Colloids +

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July 15, 2024

View abstract on PubMed

Summary

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.

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.