Green Synthesis of Iron Oxide Nanoparticles (Fe3O4-NPs) using Azadirachta Indica Aqueous Leaf Extract
DOI:
https://doi.org/10.14419/ijet.v7i4.18.21811Keywords:
Azadirachta indica, eco-friendly, iron oxide nanoparticles, magnetite, non-toxic.Abstract
On treatment of aqueous solutions of ferrous and ferric salts in alkaline medium with Azadirachta indica leaf extract, the rapid formation of stable iron oxide nanoparticles (Fe3O4-NPs) or also known as magnetite nanoparticles is observed to occur. In contrast to previously reported co-precipitation approaches, our synthesis method had utilized a much cheaper and less toxic iron precursor with environmentally benign and non-toxic Azadirachta indica leaf extract was used as a reducing and stabilizing agent. It was found that the presence of various biomolecules such as flavonoids and terpenoids of the aqueous leaf extract plays a major role for the formation of Fe3O4-NPs through infrared spectra analysis. The formation was further confirmed with strong characteristic peak observed at 249 nm for Fe3O4-NPs through UV-Vis spectroscopy. Besides, the shape was mostly spherical and oval. X-Ray Diffraction (XRD) analysis revealed the purity of synthesized Fe3O4-NPs with crystalline cubic structure phase. Transmission Electron Microscopy (TEM) results illustrated that the size and diameter was in the range from 9-14 nm which agrees with calculated Scherrer equation with average diameter of around 11 nm. Vibrating Sample Magnetometer (VSM) analysis indicated that the samples exhibit superparamagnetic with magnetization value was 82 emu/g. Results confirmed this protocol as a simple, rapid, one-step, eco-friendly, non-toxic and hence can be potentially used in various biomedical applications such as magnetic targeting drug delivery system.
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Received date: November 27, 2018
Accepted date: November 27, 2018
Published date: November 27, 2018