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http://hdl.handle.net/2445/199325
Title: | Antimonene-modified screen-printed carbon nanofibers electrode for enhanced electroanalytical response of metal ions. |
Author: | Tapia, María A. Pérez Ràfols, Clara Oliveira, Filipa M. Gusmão, Rui Serrano i Plana, Núria Sofer, Zdenek Díaz Cruz, José Manuel |
Keywords: | Voltametria Ions metàl·lics Anàlisi electroquímica Voltammetry Metal ions Electrochemical analysis |
Issue Date: | 1-Apr-2023 |
Publisher: | MDPI |
Abstract: | A two-dimensional (2D) Sb-modified screen-printed carbon nanofibers electrode (2D Sbexf-SPCNFE) was developed to improve the stripping voltammetric determination of Cd(II) and Pb(II), taking advantage of the synergistic effect between the two nanomaterials. The surface morphology of the 2D Sbexf-SPCNFE was investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. The analytical performance of 2D Sbexf-SPCNFE was compared to those presented by screen-printed carbon electrodes modified with 2D Sbexf (2D Sbexf-SPCE) and the corresponding bare electrodes: screen-printed carbon nanofibers electrode (SPCNFEbare) and screen-printed carbon electrode (SPCEbare). After optimizing the experimental conditions, the 2D Sbexf-SPCNFE exhibited much better analytical parameters compared to the other assessed sensors. Analysis in 0.01 mol L−1 HCl (pH = 2) using 2D Sbexf-SPCNFE showed excellent linear behavior in the concentration range of 2.9 to 85.0 µg L−1 and 0.3 to 82.0 µg L−1 for Cd(II) and Pb(II), respectively. The limits of detection after 240 s deposition time for Cd(II) and Pb(II) were 0.9 and 0.1 µg L−1, and sensitivities between 1.5 and 3 times higher than those displayed by SPCEbare, SPCNFEbare, and 2D Sbexf-SPCE were obtained. Finally, the 2D Sbexf-SPCNFE was successfully applied to the determination of Cd(II) and Pb(II) traces in a certified estuarine water sample. |
Note: | Reproducció del document publicat a: https://doi.org/10.3390/chemosensors11040219 |
It is part of: | Chemosensors, 2023, vol. 11, num. 219 |
URI: | http://hdl.handle.net/2445/199325 |
Related resource: | https://doi.org/10.3390/chemosensors11040219 |
ISSN: | 2227-9040 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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