Development of Highly Selective and Efficient Prototype Sensor for Potential Application in Environmental Mercury Pollution Monitoring

Sarkar, Probir Kumar; Halder, Animesh; Polley, Nabarun

doi:10.1007/s11270-017-3479-1

Cited by 25 publications

(26 citation statements)

References 46 publications

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“…In other cases, the Hg (II) ions produce the formation of a nano-alloy, due to a redox reaction involving Ag (0) and Hg (II) which modifies the plasmonic properties and as a consequence the optical absorption features [117][118][119].…”

Section: Optical Sensing Propertiesmentioning

confidence: 99%

“…All these drawbacks have pushed the research in recent years towards innovative sensors based on simple and cost effective procedures. In this framework, colorimetric sensors of water pollutants are one of the best choices since the necessary equipment to estimate the contaminant concentration is very simple and economic and in addition, such sensors for the determination of contaminants are usually fast In other cases, the Hg (II) ions produce the formation of a nano-alloy, due to a redox reaction involving Ag (0) and Hg (II) which modifies the plasmonic properties and as a consequence the optical absorption features [117][118][119].…”

Section: Main Water Pollutants Detected By Agnpsmentioning

confidence: 99%

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Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

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This review provides an up-to-date overview on silver nanoparticles-based materials suitable as optical sensors for water pollutants. The topic is really hot considering the implications for human health and environment due to water pollutants. In fact, the pollutants present in the water disturb the spontaneity of life-related mechanisms, such as the synthesis of cellular constituents and the transport of nutrients into cells, and this causes long / short-term diseases. For this reason, research continuously tends to develop always innovative, selective and efficient processes / technologies to remove pollutants from water. In this paper we will report on the silver nanoparticles synthesis, paying attention to the stabilizers and mostly used ligands, to the characterizations, to the properties and applications as colorimetric sensors for water pollutants. As water pollutants our attention will be focused on several heavy metals ions, such as Hg(II), Ni(II),Cu(II), Fe(III), Mn(II), Cr(III/V) Co(II) Cd(II), Pb(II), due to their dangerous effects on human health. In addition, several systems based on silver nanoparticles employed as pesticides colorimetric sensors in water will be also discussed. All of this with the aim to provide to readers a guide about recent advanced silver nanomaterials, used as colorimetric sensors in water.

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Section: Optical Sensing Propertiesmentioning

confidence: 99%

Section: Main Water Pollutants Detected By Agnpsmentioning

confidence: 99%

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

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“…This phenomena is known as the Mie blue shi, in which the distance between the Ag-NPs become closer owing to the interaction with Hg(II), thus they aggregate with each other and form an Ag-Hg-Ag complex. [54][55][56] As a result of this, Ag/Hg amalgam formation can occur. The aggregated Ag-NPs lose the SPR band (decrease in absorbance) and increase the overall particle size.…”

Section: Sensing Detection Of Hg 2+mentioning

confidence: 99%

A combined spectroscopic and ab initio study of the transmetalation of a polyphenol as a potential purification strategy for food additives

et al. 2020

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“…The surface amalgamation or improper amalgamation, resulting in smaller NPs, might be attributed to the blue shift of the SPR band. Nevertheless, a complete amalgamation may occur when inducing agglomeration to develop bigger Ag-Hg NPs [36]. In this study, we have developed an optical technique combining Rayleigh scattering and post-sample fluorescence detection from colloidal Ag NPs having SPR band at 420 nm.…”

Section: Sensing Mechanism and Toxic Metal Ions Detectionmentioning

confidence: 99%

Nanoparticle-based ‘turn-on’ scattering and post-sample fluorescence for ultrasensitive detection of water pollution in wider window

et al. 2020

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Ultrasensitive detection of heavy metal ions in available water around us is a great challenge for scientists since long time. We developed an optical technique that combines Rayleigh scattering of UV light (365 nm) and post-sample fluorescence detection from colloidal silver (Ag) nanoparticles (NPs) having a surface plasmon resonance (SPR) band at 420 nm. The efficacy of the technique is tested by the detection of several model toxic ions, including mercury, lead, and methylmercury in aqueous media. The light scattering from the Hg-included/ inflated Ag NPs at 395 nm was observed to saturate the light sensor even with ppm-order concentrations of Hg ions in the water sample. However, the pollutant is not detected at lower concentrations at this wavelength. Instead, the fluorescence of a high-pass filter (cutoff at 400 nm) at 520 nm is applied to detect pollutant concentrations of up to several hundreds of ppm in the water sample. We also detected lead and methylmercury as model pollutants in aqueous media and validated the efficacy of our strategy. Finally, we report the development of a working prototype based on the strategy developed for efficient detection of pollutants in drinking/agricultural water.

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Development of Highly Selective and Efficient Prototype Sensor for Potential Application in Environmental Mercury Pollution Monitoring

Cited by 25 publications

References 46 publications

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

A combined spectroscopic and ab initio study of the transmetalation of a polyphenol as a potential purification strategy for food additives

Nanoparticle-based ‘turn-on’ scattering and post-sample fluorescence for ultrasensitive detection of water pollution in wider window

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