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Artículo

Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors

Pedre, IgnacioIcon ; Battaglini, FernandoIcon ; Delgado, Gladis Judith Labrada; Sánchez Loredo, María Guadalupe; González, Graciela AliciaIcon
Fecha de publicación: 01/2015
Editorial: Elsevier Science Sa
Revista: Sensors and Actuators B: Chemical
ISSN: 0925-4005
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

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.
Palabras clave: Copper Electrorefining , Silver Nanoparticles , Spectrophotometry , Surface Plasmon Resonance Band , Thiourea
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/37470
DOI: http://dx.doi.org/10.1016/j.snb.2015.01.074
URL: https://www.sciencedirect.com/science/article/pii/S0925400515001008
Colecciones
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Pedre, Ignacio; Battaglini, Fernando; Delgado, Gladis Judith Labrada; Sánchez Loredo, María Guadalupe; González, Graciela Alicia; Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors; Elsevier Science Sa; Sensors and Actuators B: Chemical; 211; 1-2015; 515-522
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