Abstract
The increasing heavy metal pollution in the aquatic ecosystem mainly driven by industrial activities has raised severe concerns over human and environmental health that apparently necessitate the design and development of ideal strategies for the effective monitoring of heavy metals. In this regard, colorimetric detection provides excellent opportunities for the easy monitoring of heavy metal ions, and especially, corresponding solid-state sensors enable potential opportunities for their applicability in real-world monitoring. As a result of the significant interest originating from their simplicity, exceptional characteristics, and applicability, the electrospun nanofiber-based colorimetric detection of heavy metal ions has undergone radical developments in the recent decade. This review illustrates the range of various approaches and functional molecules employed in the fabrication of electrospun nanofibers intended for the colorimetric detection of various metal ions in water. We highlight relevant investigations on the fabrication of functionalized electrospun nanofibers encompassing different approaches and functional molecules along with their sensing performance. Furthermore, we discuss upcoming prospectus and future opportunities in the exploration of designing electrospun nanofiber-based colorimetric sensors for real-world applications.
Highlights
Water is the resource of human life that is more necessary than any other, and upholding its safety and quality is a great challenge in the 21st century
In an effort to understand the sensing performance, the a luminescent gold nanoclusters (AuNC)*nanofibrous membrane (NFM) has been immersed in water, and this has resulted in significant changes in the emission behavior viewed through the naked eye
Importantly, the Hg2+ -induced fluorescence strip is mainly attributed to the great immobilization of probes in electrospun was successfully recovered to the original value obtained in the absence of Hg by the addition of nanofibrous membranes and the robust stability of the interconnected hierarchical fibrous structure ethylenediaminetetraacetic acid (EDTA)
Summary
Water is the resource of human life that is more necessary than any other, and upholding its safety and quality is a great challenge in the 21st century. Union’s Restriction on Hazardous Substances (RoHS) directive for their use in electronic and electrical equipment [22] Monitoring these contaminants in the water resources is a primary concern for protecting human health against the negative impacts attributed to heavy metal toxicity. The colorimetric sensing approach complements the barriers in the utilization of expensive instruments, complex sample preparation, and employing trained personnel While these nanomaterials-based colorimetric detection give rise to monitoring the metal ions, special emphasis is laid on incorporating such nanomaterials in a suitable solid platform to overcome the obstacle for enabling their real-time and onsite applications.
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