Microbial-Physical Synthesis of Fe and Fe₃O₄ Magnetic Nanoparticles Using Aspergillus niger YESM1 and Supercritical Condition of Ethanol

Abstract

Magnetic Fe and Fe3O4 (magnetite) nanoparticles are successfully synthesized using Aspergillus niger YESM 1 and supercritical condition of liquids. Aspergillus niger is used for decomposition of FeSO4 and FeCl3 to FeS and Fe2O3, respectively. The produced particles are exposed to supercritical condition of ethanol for 1 hour at 300°C and pressure of 850 psi. The phase structure and the morphology measurements yield pure iron and major Fe3O4 spherical nanoparticles with average size of 18 and 50 nm, respectively. The crystal size amounts to 9 nm for Fe and 8 nm for Fe3O4. The magnetic properties are measured to exhibit superparamagnetic- and ferromagnetic-like behaviors for Fe and Fe3O4 nanoparticles, respectively. The saturation magnetization amounts to 112 and 68 emu/g for Fe and Fe3O4, respectively. The obtained results open new route for using the biophysical method for large-scale production of highly magnetic nanoparticles to be used for biomedical applications.

Green Synthesis of Hydrophobic Magnetite Nanoparticles Coated with Plant Extract and Their Application as Petroleum Oil Spill Collectors

“…The magnetization curves for APH-MNPs and APC-MNPs composites ( Figure 8 ) also indicate the superparamagnetic behavior. In addition, from the analysis, we observed an increased value for M s and decreased values for M r and H c as compared to other MNPs that were capped by different biocomponents [ 44 , 45 ]. The increase in the M s value of APC-MNPs reflected the lower amount of capping agent as compared with APH-MNPs, which was confirmed by the TGA analysis ( Figure 6 ).…”

Green synthesis of iron-based nanomaterials for environmental remediation: A review

“…Ferrous sulphate solution was then mixed with 1 g of washed mycelia and shaken for 72 h. Nanoparticles formed were characterized using Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). Abdeen et al (2016) have reported the fungi-based intracellular synthesis of magnetic iron and magnetite nanoparticles using Asperigillus niger isolated and cultured over 7 days. According to literature, about 250 mg/mL homogenized mycelia was mixed with precursor salts (FeSO 4 and FeCl 3 ), incubated for 6 days, centrifuged and dried to obtain FeS and Fe 2 O 3 pellets.…”

“…Schematic diagram of the biological-physical method for synthesis of magnetic nanoparticles(Abdeen et al, 2016).…”

Nanotechnology and the Sustainability: Toxicological Assessments and Environmental Risks of Nanomaterials Under Climate Change

“…Apart from plants, actinomycetes, fungi, and algae too facilitate the formulation of nanoparticles under optimum conditions of ambient temperature and pH [45]. Nanoparticles have been synthesized using bacteria and yeast extracts [46][47][48]. Nanoparticles synthesized using plants having traditional medicinal importance have been shown to possess potent biomedical and therapeutic activities both in vivo and in vitro.…”