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Simultaneous voltammetric determination of Cd2+, Pb2+, and Cu2+ ions captured by Fe3O4@SiO2 core-shell nanostructures of various outer amino chain length
Abstract
In the present study, we examined a novel functionalised magnetic nanoparticles Fe3O4@SiO2-Nn as a nano adsorbent for binding of Cd2+, Pb2+, Cu2+ ions in an aqueous solution. First, we obtained the nanoparticles functionalised with various carbon chains containing different number of amino groups: (3-amino)propyltriethoxysilane (Fe3O4@SiO2-N1), N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (Fe3O4@SiO2-N2) and N1-(3-trimethoxysilylpropyl)diethylenetriamine (Fe3O4@SiO2-N3). In the next step, we conducted their characterisation using SEM, TEM, FT-IR, and XPS methods. The detection of Cd2+, Pb2+, Cu2+ metal ions was performed under optimised experimental conditions using DPASV and HDME techniques. Using these methods we conducted the Cd2+, Pb2+, Cu2+ binding comparison in 4.5 μM concentration with 4 mg of Fe3O4@SiO2-Nn. Obtained results show that the adsorption rate of each ion differs due to the nanoparticles modification. The highest Pb2+ binding capacity was achieved using Fe3O4@SiO2-N1 and Fe3O4@SiO2-N2. The smallest binding capacity was observed for Cd2+ ions by Fe3O4@SiO2-N2 and Fe3O4@SiO2-N1. The Cd2+ biding was not observed for both Fe3O4@SiO2-N2 and Fe3O4@SiO2-N3 nanoparticles. Additionally, Pb2+ was not bound by Fe3O4@SiO2-N3. The research results show that the Fe3O4@SiO2-N3 nanoparticles bind copper ions with high selectivity. For the first time we performed the adsorption-desorption experiments using DPASV to prove the Cu2+ binding activity of Fe3O4@SiO2-N3 nanoparticles. Obtained results indicate that examined nanoparticles show strong binding capability. Additionally, we obtained 99.9% recovery of Cu2+ ions.
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Authors (7)
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Amanda Kulpa
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Grzegorz Schroeder
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Adrian Koterwa
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Jacek Sein Anand dr hab. med.
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Tadeusz Ossowski prof. dr hab. inż.
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Paweł Niedziałkowski Dr
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF MOLECULAR LIQUIDS
no. 314,
ISSN: 0167-7322 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Kulpa A., Ryl J., Schroeder G., Koterwa A., Anand J., Ossowski T., Niedziałkowski P.: Simultaneous voltammetric determination of Cd2+, Pb2+, and Cu2+ ions captured by Fe3O4@SiO2 core-shell nanostructures of various outer amino chain length// JOURNAL OF MOLECULAR LIQUIDS -Vol. 314, (2020), s.113677-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.molliq.2020.113677
- Verified by:
- Gdańsk University of Technology
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