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733282.pdf (2.93 MB)

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2023-04-01

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cc-by (c) Tapia, María A. et al., 2023
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/199325

Antimonene-modified screen-printed carbon nanofibers electrode for enhanced electroanalytical response of metal ions.

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Recurs relacionat

https://doi.org/10.3390/chemosensors11040219

Resum

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.

Matèries

Voltametria, Ions metàl·lics, Anàlisi electroquímica

Matèries (anglès)

Voltammetry, Metal ions, Electrochemical analysis

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Articles publicats en revistes (Enginyeria Química i Química Analítica)

Citació

TAPIA, María A., et al. Antimonene-modified screen-printed carbon nanofibers electrode for enhanced electroanalytical response of metal ions. Chemosensors. 2023. Vol. 11, num. 219. ISSN 2227-9040. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/199325

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