Zn-substituted iron oxide nanoparticles from thermal decomposition and their thermally treated derivatives for magnetic solid-phase extraction

0532537 - FZÚ 2021 RIV NL eng J - Journal Article
Kubíčková, Lenka - Koktan, Jakub - Kořínková, Tereza - Klementová, Mariana - Kmječ, T. - Kohout, J. - Weidenkaff, A. - Kaman, Ondřej
Zn-substituted iron oxide nanoparticles from thermal decomposition and their thermally treated derivatives for magnetic solid-phase extraction.
Journal of Magnetism and Magnetic Materials. Roč. 498, Mar (2020), s. 1-10, č. článku 166083. ISSN 0304-8853. E-ISSN 1873-4766
R&D Projects: GA ČR GA18-13323S; GA MŠMT LM2015087
Institutional support: RVO:68378271
Keywords : Mossbauer spectroscopy * magnetic nanoparticles * magnetite * thermal decomposition * steroid pollutants * zinc ferrite
OECD category: Nano-materials (production and properties)
Impact factor: 2.993, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.jmmm.2019.166083

Controlled thermal decomposition of zinc and iron acetylacetonates in the presence of oleic acid and oleylamine provided surfactant-capped magnetic nanoparticles with narrow size distribution and the mean diameter of ≈15 nm. The combined study by XRD, XRF and Mössbauer spectroscopy revealed: (i) the actual ratio of Zn:Fe was considerably lower in the product compared to the initial ratio of metal precursors, (ii) pure stoichiometric Zn-doped magnetite system with no signatures of oxidation to maghemite was formed, (iii) Zn2+ ions were distributed at both tetrahedral and octahedral sites. Furthermore, carbon-coated nanoparticles were achieved by pyrolysis of the surfactants at 500 °C, providing a potential sorbent of organic pollutants. Preliminary experiments with magnetic solid-phase extraction of β-estradiol from aqueous solutions evidenced applicability and reusability of the carbon-coated product in the separation of steroid pollutants.
Permanent Link: http://hdl.handle.net/11104/0311001