The great performance of nanostructured hydroxyapatite (Hap) in adsorbing heavy metal cations with the good electrical conductivity of high-surface carbon materials was here combined for the crafting of high-content hydroxyapatite electrodes (Hap 84–96 wt.%) endowed with the synergistic capability of detection and adsorption of heavy metal cations by water solutions. To improve the sustainability of the sensor, a mesoporous carbon (derivable by bio-waste) was selected as scaffold for depositing Hap by simply co-precipitation. The composite with 92 wt.% of Hap, which exhibited ca. 1:1 ratio between the exposed area of Hap and carbon (by Brunauer-Emmett-Teller method), invariably showed an average stripping oxidation peak intensity of ca. 250 μAcm-2 and 150 μAcm-2 for a 50 μM Pb2+ and Cu2+ solution, respectively. Control experiments showed that the above sensor outperformed the sensibility of two low-content Hap electrodes (4 and 8 wt.%), representative of the best performing Hap-carbon composites available in literature.

High‐Content Hydroxyapatite Carbon Composites for the Electrochemical Detection of Heavy Metal Cations in Water / M. Magni, D. Sironi, M. Ferri, S.P.M. Trasatti, S. Campisi, A. Gervasini, M. Papacchini, P. Cristiani. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - (2023 Jan 16), pp. e202201017.1-e202201017.11. [10.1002/celc.202201017]

High‐Content Hydroxyapatite Carbon Composites for the Electrochemical Detection of Heavy Metal Cations in Water

M. Magni
Primo
;
M. Ferri;S.P.M. Trasatti;S. Campisi;A. Gervasini;
2023

Abstract

The great performance of nanostructured hydroxyapatite (Hap) in adsorbing heavy metal cations with the good electrical conductivity of high-surface carbon materials was here combined for the crafting of high-content hydroxyapatite electrodes (Hap 84–96 wt.%) endowed with the synergistic capability of detection and adsorption of heavy metal cations by water solutions. To improve the sustainability of the sensor, a mesoporous carbon (derivable by bio-waste) was selected as scaffold for depositing Hap by simply co-precipitation. The composite with 92 wt.% of Hap, which exhibited ca. 1:1 ratio between the exposed area of Hap and carbon (by Brunauer-Emmett-Teller method), invariably showed an average stripping oxidation peak intensity of ca. 250 μAcm-2 and 150 μAcm-2 for a 50 μM Pb2+ and Cu2+ solution, respectively. Control experiments showed that the above sensor outperformed the sensibility of two low-content Hap electrodes (4 and 8 wt.%), representative of the best performing Hap-carbon composites available in literature.
anodic stripping voltammetry; carbon composites; electrochemical sensors; heavy metals detectors; hydroxyapatite
Settore CHIM/07 - Fondamenti Chimici delle Tecnologie
Settore CHIM/02 - Chimica Fisica
Settore CHIM/01 - Chimica Analitica
INAIL17STRAS_01 - Celle a combustibile microbiche come biosensori per il monitoraggio in tempo reale di sostanze tossiche e cancerogene - TRASATTI, STEFANO PIERPAOLO MARCELLO - INAIL - Bandi I.N.A.I.L. - 2017
https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.202201017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/951384
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