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article · RSC Advances

Molecularly imprinted polymer-based electrochemical sensors for monitoring the persistent organic pollutants chlorophenols

202424 citationsOpen accessAin Shams University

In plain language

Chlorophenols represent a major class of persistent organic pollutants that present severe environmental and public health hazards. Effective monitoring requires rapid and onsite detection, making electrochemical sensing a practical solution. Molecularly imprinted polymer sensors paired with miniature electrochemical transducers allow for in situ measurement of target analytes. These sensing devices demonstrate strong physical and chemical stability, low manufacturing costs, high selectivity, and fast response times. Incorporating nanomaterials into sensor platforms frequently enhances analytical performance, particularly sensitivity. Notably, such electrochemical sensors have been successfully applied to real water samples without requiring time-consuming pretreatment steps. Key technical considerations include selecting suitable functional monomers, platforms, and materials to optimise detection limits and linear concentration ranges across diverse water environments.

Key takeaways

  • Chlorophenols are hazardous persistent organic pollutants that create an urgent demand for onsite, real-time detection.
  • Molecularly imprinted polymers combined with miniature electrochemical transducers enable in situ water analysis.
  • The sensors feature high selectivity, low production costs, robust stability, and rapid response times.
  • Nanoparticles are commonly incorporated during fabrication to increase sensitivity.
  • These sensors can detect chlorophenols in real water samples without complex pretreatment procedures.

Why it matters

Chlorophenols persist in the environment and pose notable risks to public health. Conventional monitoring often relies on slow laboratory processes. Electrochemical sensors that use molecularly imprinted polymers provide a durable, inexpensive, and fast alternative, enabling direct testing in the field without the need for complicated sample preparation.

Commercialisation angle

This sensing approach could enable portable devices for onsite environmental monitoring and water quality testing by environmental agencies and water utilities. The technology appears to be applied and tested, having proven successful on real water samples without complex preparation, though industrial product development would still be needed for widespread commercial use.

AI-generated from the published abstract. Always read the original work before citing.

Abstract

Because of the serious risks they pose to the environment and public health, chlorophenols (CPs), a typical class of the most persistent organic pollutants, have drawn increasing attention. Monitoring CPs effectively has become a pressing and difficult problem. The rapidly increasing need for onsite and real-time CP detection has led to the consideration of electrochemical sensing as a workable solution. Molecularly imprinted polymer (MIP)-based electrochemical sensing has emerged as a promising area for environmental monitoring in response to this analytical problem. MIPs, in conjunction with miniature electrochemical transducers, provide the opportunity to detect target analytes <i>in situ</i>. These devices have the advantages of great chemical and physical stability, cheap production costs, good selectivity, and quick response times. Most studies suggest that these sensors use nanoparticles to improve their analytical properties, especially sensitivity. Furthermore, these sensors have successfully used real water samples without the need for time-consuming pretreatment procedures. This article provides an overview of electrochemical MIP-based sensors reported to detect CPs in water samples. To obtain the highest sensitivity, special consideration is given to the fabrication of the sensors, which includes the use of various functional monomers, sensing platforms, and materials. Several other parameters are also discussed, including the linear concentration range, limit of detection, and the types of water samples that were examined.

Research topics

  • Analytical chemistry methods development
  • Analytical Chemistry and Chromatography
  • Advanced Chemical Sensor Technologies

Read the original research

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DOI: 10.1039/d4ra03095h

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