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Open AccessArticle

High Yield Synthesis and Application of Magnetite Nanoparticles (Fe3O4)

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University of Guelph, 95 Stone Road West, Guelph, ON N1H 8J7, Canada
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University of Waterloo, 200 University Ave. W., Nanotechnology, Engineering, Waterloo, ON N2L 3G1, Canada
*
Author to whom correspondence should be addressed.
Magnetochemistry 2020, 6(2), 22; https://doi.org/10.3390/magnetochemistry6020022
Received: 9 April 2020 / Revised: 5 May 2020 / Accepted: 12 May 2020 / Published: 15 May 2020
(This article belongs to the Section Magnetic Nanospecies)
Magnetite nanoparticles (Fe3O4), average particle size of 12.9 nm, were synthesized de novo from ferrous and ferric iron salt solutions (total iron salt concentration of 3.8 mM) using steady-state headspace NH3(g), 3.3% v/v, at room temperature and pressure, without mechanical agitation, resulting in >99.9% yield. Nanoparticles size distributions were based on enumeration of TEM images and chemical compositions analyzed by: XRD, EDXRF, and FT-IR; super-paramagnetic properties were analyzed by magnetization saturation (74 emu/g). Studies included varying headspace [NH3(g)] (1.6, 3.3, 8.4% v/v), and total iron concentrations (1.0 mM, 3.8 mM, 10.0 mM, and >>10 mM). An application of the unmodified synthesized magnetite nanoparticles included analyses of tetracycline’s (50, 100, 200, 300, and 400 ppb) in aqueous, which was compared to the same tetracycline concentrations prepared in aqueous synthesis suspension with >97% extraction, analyzed with LC-MS/MS. View Full-Text
Keywords: magnetite nanoparticles; synthesis; repeatable; ammonia headspace; super-paramagnetic; tetracyclines; remediation; analytical; biological magnetite nanoparticles; synthesis; repeatable; ammonia headspace; super-paramagnetic; tetracyclines; remediation; analytical; biological
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Wroblewski, C.; Volford, T.; Martos, B.; Samoluk, J.; Martos, P. High Yield Synthesis and Application of Magnetite Nanoparticles (Fe3O4). Magnetochemistry 2020, 6, 22.

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