EDTA-functionalized Fe3O4 nanoparticles

• Published in: The Journal of physics and chemistry of solids Vol. 113; pp. 5 - 10
• Main Authors: Magdalena, A.G., Silva, I.M.B., Marques, R.F.C., Pipi, A.R.F., Lisboa-Filho, P.N., Jafelicci, M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2018
• Subjects: EDTA; Functionalization; Magnetic nanoparticles; Magnetite; Magnetite; Functionalization; EDTA; Magnetic nanoparticles
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2017.10.002

This study analyzes the synthesis and characterization of functionalized Fe3O4 nanoparticles by ethylenediaminetetraacetic acid (EDTA). The syntheses were performed using the co-precipitation method under different experimental conditions: nitrogen atmosphere versus ambient atmospheric conditions, and temperatures of 25 °C versus 90 °C. X-ray diffraction techniques, Fourier transform infrared (FTIR) spectroscopy, zeta potential, and transmission electron microscopy (TEM) were used to characterize these nanoparticles. The co-precipitation method produced high homogeneity in nanostructure shape and size. The functionalization of the magnetite surface was confirmed by the FTIR analyses and the development of new bands associated with EDTA as well as by zeta potential change. The addition of EDTA was also found to change the mechanism of nucleation and nanostructure growth; EDTA was found to favor nucleation, thus decreasing nanoparticle size. •The addition of EDTA acts as a barrier to the growth of nanoparticle nuclei.•The surface charge distribution is affected by temperatures and EDTA concentration.•Nanomaterials presented high homogeneity in shape and size.