Synthesis of single‐phase and controlled monodisperse magnetite Fe₃O₄ nanoparticles

Abstract

We report a simple solvothermal method for the synthesis of monodisperse magnetite nanoparticles with a controlled particle size within the range of 40 to 200 nm from available and inexpensive single iron precursor (FeCl 3) and, as co-capping agents, sodium acetate and ethylene diamine. The particle size can be easily controlled by the reaction time of synthesis. Transmission electron microscopy, x-ray diffraction, Fourier transform infrared spectroscopy, and x-ray photoelectron spectroscopy techniques were used to investigate the obtained particles. The results revealed that the resulting iron oxide particles exhibit a single magnetite Fe 3 O 4 phase and high stability in air even for four months. The high air stability of these magnetite could be due to the surfactant capped on the particle surface. This method of synthesis has some advantages including simplicity, high product quality, and acceptable reproducibility. Therefore, the magnetite particles can be used for different applications such as in catalysis and drug delivery.

Synthesis of magnetic core@dual shell Fe3O4@SiO2@WO3 nanocatalysts for olefin double bond oxidative cleavage

“…Magnetic iron oxide core nanoparticles were prepared following our previous work. [ 39 ] Both size and morphology parameters were studied by SEM analyses (Figure 2). NPs exhibited an average size of 154 nm with a spherical morphology, with a relative SD of 12% (Figure 2 inset).…”

“…NPs exhibited an average size of 154 nm with a spherical morphology, with a relative SD of 12% (Figure 2 inset). As reported in the previous work, [ 39 ] two surfactants (sodium acetate and ethylene diamine) were used for the synthesis of capped‐Fe 3 O 4 NPs. Each Fe 3 O 4 NPs was composed of small primary nanocrystals of approximately 25 nm in diameter.…”

“…The monodispersed magnetite core of 150 nm reproducible magnetite Fe 3 O 4 NPs was synthesized in 10 hours, according to a previously published protocol. [ 39 ]…”

Issue Highlights

“…Nanoparticles can be recovered easily from the solution by a short contact time with a magnet. [ 3 ]…”

“…Nanoparticles can be recovered easily from the solution by a short contact time with a magnet. [3] An ontology-based procedure knowledge framework for the process industry Jian Cao, Yan-Lin He, QunXiong Zhu Process industry enterprises rely on expert experience in production. However, expert knowledge is stored in multiple formats like pictures, texts, videos, etc.…”