Silver nanoparticles capped with 3-mercapto-1propanesulfonic acid sodium salt (AgNPs-3MPS), able to interact with Ni2+ or Co2+, have been prepared to detect these heavy metal ions in water. This system works as an optical sensor and it is based on the change of the intensity and shape of optical absorption peak due to the surface plasmon resonance (SPR) when the AgNPs-3MPS are in presence of metals ions in a water solution. We obtain a specific sensitivity to Ni2+ and Co2+ up to 500 ppb (part per billion). For a concentration of 1 ppm (part per million), the change in the optical absorption is strong enough to produce a colorimetric effect on the solution, easily visible with the naked eye. In addition to the UV-VIS characterizations, morphological and dimensional studies were carried out by transmission electron microscopy (TEM). Moreover, the systems were investigated by means of dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution X-ray photoelectron spectroscopy (HR-XPS). On the basis of the results, the mechanism responsible for the AgNPs-3MPS interaction with Ni2+ and Co2+ (in the range of 0.5⁻2.0 ppm) looks like based on the coordination compounds formation.

Mochi, F., Burratti, L., Fratoddi, I., Venditti, I., Battocchio, C., Carlini, L., et al. (2018). Plasmonic sensor based on interaction between silver nanoparticles and Ni2+or Co2+in water. NANOMATERIALS, 8(7), 488 [10.3390/nano8070488].

Plasmonic sensor based on interaction between silver nanoparticles and Ni2+or Co2+in water

Mochi F.;Venditti I.;Casalboni M.;De Matteis F.;Prosposito P.
2018

Abstract

Silver nanoparticles capped with 3-mercapto-1propanesulfonic acid sodium salt (AgNPs-3MPS), able to interact with Ni2+ or Co2+, have been prepared to detect these heavy metal ions in water. This system works as an optical sensor and it is based on the change of the intensity and shape of optical absorption peak due to the surface plasmon resonance (SPR) when the AgNPs-3MPS are in presence of metals ions in a water solution. We obtain a specific sensitivity to Ni2+ and Co2+ up to 500 ppb (part per billion). For a concentration of 1 ppm (part per million), the change in the optical absorption is strong enough to produce a colorimetric effect on the solution, easily visible with the naked eye. In addition to the UV-VIS characterizations, morphological and dimensional studies were carried out by transmission electron microscopy (TEM). Moreover, the systems were investigated by means of dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution X-ray photoelectron spectroscopy (HR-XPS). On the basis of the results, the mechanism responsible for the AgNPs-3MPS interaction with Ni2+ and Co2+ (in the range of 0.5⁻2.0 ppm) looks like based on the coordination compounds formation.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/03 - Fisica della Materia
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali
Settore ING-IND/23 - Chimica Fisica Applicata
eng
Co2+ sensing; Ni2+ sensing; heavy metal ions sensing; optical sensors; silver nanoparticles; surface plasmon resonance; water pollution
Mochi, F., Burratti, L., Fratoddi, I., Venditti, I., Battocchio, C., Carlini, L., et al. (2018). Plasmonic sensor based on interaction between silver nanoparticles and Ni2+or Co2+in water. NANOMATERIALS, 8(7), 488 [10.3390/nano8070488].
Mochi, F; Burratti, L; Fratoddi, I; Venditti, I; Battocchio, C; Carlini, L; Iucci, G; Casalboni, M; De Matteis, F; Casciardi, S; Nappini, S; Pis, I; Prosposito, P
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/201953
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