Abstract
Silver nanoparticles (AgNPs) were synthesized using Azadirachta indica and Vernonia amygdalina leaves extracts. Current nanotechnology research uses a lot of chemicals which are quite often toxic and flammable. In this research article, a simple and eco-friendly synthetic method for silver nanoparticles preparation was reported using the leaves extracts of Azadirachta indica (commonly called neem) and Vernonia amygdalina (commonly called bitter leaf) as reducing agents. The synthesis of AgNPs was monitored and confirmed with the use of UV-Visible spectrophotometer, Fourier Transform Infrared (FTIR) spectroscopy and Powder X-ray Diffraction (PXRD). The reduction process of Ag+ to Ag0 was observed by the change of color from yellow to brown for both leaves. The UV-Vis Spectra of AgNPs in aqueous solution showed absorbance peaks around 455 nm for Azadirachta indica and 460 nm for Vernonia amygdalina due to silver surface plasmon resonance. Crystallinity of the AgNPs was confirmed with PXRD. In addition, FTIR spectra showed that the AgNPs were capped with phytochemicals from the leaves extracts.Keywords: AgNPs, UV-Vis, FTIR, Azadirachta indica, Vernonia amygdalina
Highlights
Silver nanoparticles (AgNPs) were synthesized using Azadirachta indica and Vernonia amygdalina leaves extracts
Nanotechnology is an important field of applied science and technology dealing with design, synthesis and manipulation of structure of particles ranging from approximately 1–100 nm
The synthesized silver nanoparticles were characterized by UV–Vis spectroscopy, Fourier Transform Infrared (FTIR) and powder X-ray diffraction (PXRD)
Summary
Silver nanoparticles (AgNPs) were synthesized using Azadirachta indica and Vernonia amygdalina leaves extracts. A simple and eco-friendly synthetic method for silver nanoparticles preparation was reported using the leaves extracts of Azadirachta indica (commonly called neem) and Vernonia amygdalina (commonly called bitter leaf) as reducing agents. Researchers have discovered that phytochemicals present in plant extracts are responsible for metal ion reduction and capping of the newly formed particles during their growth processes (Smith et al, 2006; Wei et al, 2005). The objective of this work is to synthesize silver nanoparticles by simple, effective and eco-friendly method using leaves extracts of Azadirachta indica (commonly known as neem), a member of the Meliaceae family and Vernonia amygdalina (commonly known as bitter leaf) a tropical plant belonging to the family Compositae. The synthesized silver nanoparticles were characterized by UV–Vis spectroscopy, FTIR and powder X-ray diffraction (PXRD)
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