Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors
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 t...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v211_n_p515_Pedre http://hdl.handle.net/20.500.12110/paper_09254005_v211_n_p515_Pedre |
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paper:paper_09254005_v211_n_p515_Pedre2023-06-08T15:51:18Z Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors 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 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v211_n_p515_Pedre http://hdl.handle.net/20.500.12110/paper_09254005_v211_n_p515_Pedre |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| topic_facet |
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 |
| description |
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. |
| title |
Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| title_short |
Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| title_full |
Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| title_fullStr |
Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| title_full_unstemmed |
Detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| title_sort |
detection of thiourea from electrorefining baths using silver nanoparticles-based sensors |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v211_n_p515_Pedre http://hdl.handle.net/20.500.12110/paper_09254005_v211_n_p515_Pedre |
| _version_ |
1768542183939375104 |