Abstract
This study reports a facile and ecofriendly approach for the ultrasound assisted synthesis of silver and iron oxide nanoparticles and their enhanced antibacterial and antioxidant activities. The fenugreek seed extract was used as reducing, capping, and stabilizing agent in the synthesis of nanoparticles. The transmission electron microscopy results showed that nanoparticles synthesized by ultrasonication have a smaller size (~20 nm) as compared to the nanoparticles fabricated by magnetic stirring (~40 nm). The color change of the solution from milky white to brown suggested the formation of silver nanoparticles which was confirmed by the presence of an absorbance peak at 396 nm. The results of powder X-ray diffraction and energy dispersive X-ray spectroscopy confirmed the crystallinity and elements present in nanoparticles synthesized using fenugreek seed extract. Fourier transform infrared analysis showed that the fenugreek seed phytochemicals were coated on the nanoparticle surface. Thermal gravimetric analysis showed the thermal degradation and stability of nanoparticles. Magnetization study of iron oxide nanoparticles confirmed the superparamagnetic nature. The silver nanoparticles showed antibacterial activities against both gram-negative (Escherichia coli) and gram-positive (Staphylococcus aureus) bacteria, while no antibacterial activities were observed for iron oxide nanoparticles. The ultrasound assisted nanoparticles showed higher stability and antibacterial and antioxidant activity compared with the nanoparticles fabricated by magnetic stirring.
Highlights
The emerging unique properties and applications of nanoparticles have made nanotechnology one of the most interesting areas of research
It was found that the size and shape of silver and iron oxide nanoparticles synthesized using fenugreek seed extract by magnetic stirring and ultrasonication were irregular in size and nearly spherical in shape
The average particle size of silver nanoparticles prepared by magnetic stirring was found to be approximately 40 nm, whereas the synthesis mediated with ultrasound produced lesser sized (∼20 nm) silver nanoparticles
Summary
The emerging unique properties and applications of nanoparticles have made nanotechnology one of the most interesting areas of research. Though there are many methods of synthesizing nanoparticles such as chemical and physical method, green synthesis of nanoparticles has gained prominence in recent years [1, 2]. The green synthesis involves the usage of various reducing agents such as plant extracts and microbes [3,4,5]. The plant extract synthesized nanoparticles have acquired significant importance due to their cost effectiveness, stability, ease of availability, and preparation, compared to the nanoparticles synthesized by chemicals and microbes. Plant extracts such as gallnut extract [6], Kalopanax pictus extract [7], etc. Plant extracts such as gallnut extract [6], Kalopanax pictus extract [7], etc. have been explored in order to synthesize metal based nanoparticles i.e., silver, gold, iron oxide, indium oxide, copper, palladium, selenium nanoparticles, manganese dioxide, etc
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
