Abstract:
A novel and easy-to-use colorimetric thiourea (TU) sensor based on immobilized polyvinylpyrrolidone-stabilized silver nanoparticles (PVP-AgNPs) is reported. The new sensor is aimed for its direct application in copper electrorefinery baths. Quantitative analysis was carried out by adding different thiourea amounts into a synthetic bath and monitoring the absorption changes of the surface plasmon resonance band (SPRB) by UV-Vis spectrophotometry. A linear correlation between the absorbance change and thiourea concentration was obtained, ranging from 0.125 mg/L to 1 mg/L. Our technique has the advantage of working in acidic and high ionic concentrated solutions as those used in electrorefinery baths. The influence of the nanoparticles synthesis conditions on the thiourea sensing was analyzed; particularly, the effect of using different silver concentrations and the same amount of borohydride ions as reducing agent ([Ag+]/[BH4-] ratios of 2:1, 8:1, 10:1 and 20:1 during the synthesis). The proposed system provides a simple, economical, easy-to-handle and rapid measurement tool for monitoring hydrometallurgical processes for optimizing the reconditioning of thiourea solutions, reducing its environmental impact. © 2015 Elsevier B.V.
Registro:
Documento: |
Artículo
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Título: | Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
Autor: | Pedre, I.; Battaglini, F.; Delgado, G.J.L.; Sánchez-Loredo, M.G.; González, G.A. |
Filiación: | INQUIMAE - Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, Buenos Aires, 1428, Argentina Instituto Potosino de Investigación Científica y Tecnológica, Camino A la Presa San José 2055, San-Luis-Potosí, 78216, Mexico Instituto de Metalurgia/Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Sierra Leona 550, San-Luis-Potosí, 78210, Mexico
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Palabras clave: | Copper electrorefining; Silver nanoparticles; Spectrophotometry; Surface plasmon resonance band; Thiourea; Copper; Environmental impact; Nanoparticles; Plasmons; Spectrophotometry; Surface plasmon resonance; Synthesis (chemical); Thioureas; Concentrated solution; Copper electrorefining; Hydrometallurgical process; Nanoparticles synthesis; Poly vinyl pyrrolidone; Silver concentration; Silver nanoparticles; UV-vis spectrophotometry; Silver |
Año: | 2015
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Volumen: | 211
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Página de inicio: | 515
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Página de fin: | 522
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DOI: |
http://dx.doi.org/10.1016/j.snb.2015.01.074 |
Título revista: | Sensors and Actuators, B: Chemical
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Título revista abreviado: | Sens Actuators, B Chem
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ISSN: | 09254005
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CODEN: | SABCE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v211_n_p515_Pedre |
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Citas:
---------- APA ----------
Pedre, I., Battaglini, F., Delgado, G.J.L., Sánchez-Loredo, M.G. & González, G.A.
(2015)
. Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors. Sensors and Actuators, B: Chemical, 211, 515-522.
http://dx.doi.org/10.1016/j.snb.2015.01.074---------- CHICAGO ----------
Pedre, I., Battaglini, F., Delgado, G.J.L., Sánchez-Loredo, M.G., González, G.A.
"Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors"
. Sensors and Actuators, B: Chemical 211
(2015) : 515-522.
http://dx.doi.org/10.1016/j.snb.2015.01.074---------- MLA ----------
Pedre, I., Battaglini, F., Delgado, G.J.L., Sánchez-Loredo, M.G., González, G.A.
"Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors"
. Sensors and Actuators, B: Chemical, vol. 211, 2015, pp. 515-522.
http://dx.doi.org/10.1016/j.snb.2015.01.074---------- VANCOUVER ----------
Pedre, I., Battaglini, F., Delgado, G.J.L., Sánchez-Loredo, M.G., González, G.A. Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors. Sens Actuators, B Chem. 2015;211:515-522.
http://dx.doi.org/10.1016/j.snb.2015.01.074