| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1489123 | Materials Research Bulletin | 2012 | 5 Pages |
Magnetite (Fe3O4) nanoparticles were controllably synthesized by aerial oxidation FeIIEDTA solution under different monowavelength light-emitting diode (LED) lamps irradiation at room temperature. The results of the X-ray diffraction (XRD) spectra show the formation of magnetite nanoparticle further confirmed by Fourier transform infrared spectroscope (FTIR) and the difference in crystallinity of as-prepared samples. Fe3O4 particles are nearly spherical in shape based on transmission electron microscopy (TEM). Average crystallite sizes of magnetite can be controlled by different irradiation light wavelengths from XRD and TEM: 50.1, 41.2, and 20.3 nm for red, green, and blue light irradiation, respectively. The magnetic properties of Fe3O4 samples were investigated. Saturation magnetization values of magnetic nanoparticles were 70.1 (sample M-625), 65.3 (sample M-525), and 58.2 (sample M-460) emu/g, respectively.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Magnetite was synthesized under monowavelength LED irradiation at room temperature. ► Different wavelength irradiations led to distinctive characteristics of magnetite. ► Particle sizes of magnetite were controlled by different irradiation wavelengths. ► Wavelength affects the magnetic characteristics of magnetite.
