High‐Content Hydroxyapatite Carbon Composites for the Electrochemical Detection of Heavy Metal Cations in Water
Articolo
Data di Pubblicazione:
2023
Citazione:
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]
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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
anodic stripping voltammetry; carbon composites; electrochemical sensors; heavy metals detectors; hydroxyapatite
Elenco autori:
M. Magni, D. Sironi, M. Ferri, S.P.M. Trasatti, S. Campisi, A. Gervasini, M. Papacchini, P. Cristiani
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