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Electroactive poly(thionine) as imprinted polymer and reference probe simultaneously for ratiometric ion imprinted
Jiawei Liu1, Jin Zou1, Linbo Deng1
1Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.
A new electrochemical sensor using ion-imprinted polymer/Au nanoparticles/porous biochar (IIP/AuNPs/PBC) offers highly selective and sensitive detection of lead ions (Pb2+). This stable sensor provides accurate heavy metal ion monitoring, crucial for environmental and health applications.
Area of Science:
- Electrochemistry
- Materials Science
- Environmental Science
Background:
- Heavy metal ion contamination poses significant risks to environmental and human health.
- Development of selective and sensitive detection methods for lead ions (Pb2+) is critical.
- Existing sensors often face challenges with stability and interference.
Purpose of the Study:
- To develop a novel electrochemical sensor for the selective and sensitive detection of lead ions (Pb2+).
- To utilize an ion-imprinted polymer (IIP) combined with gold nanoparticles (AuNPs) and porous biochar (PBC) for enhanced sensing performance.
- To incorporate a ratiometric signal mode for improved sensor stability and accuracy.
Main Methods:
- Fabrication of a composite material comprising IIP, AuNPs, and PBC.
- Utilizing poly(thionine) (pTHI) as both the imprinted polymer and an internal reference probe.
- Employing electrochemical techniques to detect Pb2+ based on the synergistic effects of the composite materials.
Main Results:
- The IIP/AuNPs/PBC sensor demonstrated high selectivity and sensitivity for Pb2+ detection.
- A wide linear detection range of 0.1-1000 μg L−1 and a low detection limit of 0.03 μg L−1 (S/N = 3) were achieved.
- The sensor exhibited excellent stability and selectivity, minimizing interference from other factors.
Conclusions:
- The developed electrochemical sensor offers a robust platform for accurate Pb2+ detection.
- The combination of IIP, AuNPs/PBC, and a ratiometric signal enhances sensor performance.
- This sensor provides a valuable tool for monitoring heavy metal ions in environmental and biological samples.
