Abstract
Iron oxide nanoparticles (α- Fe2O3) were synthesized using an unconventional, eco-friendly technique utilizing a Hibiscus rosa sinensis flower (common name, China rose) extract as a reducer and stabilizer agent. The microwave method was successfully used for the synthesis of iron oxide nanoparticles. Various volume ratios of iron chloride tetrahydrate to the extract were taken and heated by the microwave oven for different periods to optimize iron oxide nanoparticle production. The synthesized iron oxide nanoparticles were characterized using the ultraviolet-visible spectrometer (UV-Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD). X-ray diffraction confirmed the formation of α- Fe2O3 nanoparticles (hematite). The average size of iron oxide nanoparticles was found to be 51 nm. The antibacterial activity of the synthesized iron nanoparticles was investigated against different bacteria such as Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumonia, and Escherichia coli. The results showed that the synthesized iron nanoparticles exhibited an inhabitation effect on all studied bacteria.
Highlights
Metal nanoparticles gain great attention due to their wide range of applications in the fields of electronics, optoelectronics, antibacterial activity, and medical applications such as therapy, diagnosis, and drug delivery [1–3]. e development of adequate techniques for synthesizing metal nanoparticles has become a major focus of researchers
We report the synthesise of iron oxide nanoparticles (α- Fe2O3 NPs) using iron chloride tetrahydrate as a precursor. e various phytochemicals present in the Hibiscus rosa sinensis flower leaves act as reducing and capping agents for the synthesis of NPs [10]
ultraviolet-visible spectrometer (UV-Vis) Spectroscopy. e synthesis of iron oxide nanoparticles using Hibiscus rosa sinensis flower extract was preliminarily confirmed by a characteristic change of the colour of the extract solution from yellow to a dark brown
Summary
Metal nanoparticles gain great attention due to their wide range of applications in the fields of electronics, optoelectronics, antibacterial activity, and medical applications such as therapy, diagnosis, and drug delivery [1–3]. e development of adequate techniques for synthesizing metal nanoparticles has become a major focus of researchers. E chemical method involves chemical agents, resulting in a large amount of chemical waste as a byproduct, resulting in environmental contamination issues. Diverse methods have been developed and utilized for synthesizing metal nanoparticles, such as chemical, physical, and green methods. Physical methods such as gamma irradiation, pulse laser ablation, and spark discharge are used to synthesize nanoparticles, and these methods are effective; they require relatively expensive apparatus. Green methods involving plant extracts, bacterial, and fungal forms are the most considered to produce various metal nanoparticles [4, 5]. E reported studies are on photocatalytic degradations and domestic wastewater treatment None of these studies revealed the antibacterial activity of αFe2O3 nanoparticles [12]
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