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A review on green synthesis of silver nanoparticle through plant extract and its medicinal applications
Author : Sarvaree Bano a, Manisha Agrawal *b and Dharm Pal c
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ABSTRACT
Silver nanoparticles (AgNPs) are gaining attention because of its wide application in medical science as antimicrobial and antibacterial properties. A conventional method for synthesis of AgNPs consumes hazardous chemicals and during production of NPs harmful by-products may also form. Proposed review suggests “greener technology” for synthesis of silver nanoparticles with the help of easily available plants. Aqueous extract of leaf or roots of Impatiens balsamina, Lantana camara, Eriobotrya japonica, Berberis vulgaris, Azadirachta indica, Psidium guajava, Moringa oleifera and Catharanthus roseus and other plant extracts are used as reducing agents to convert Ag+ into Ag0. Light or faint color of plant extract after addition of AgNO3 turns to brown or deep brown in color, indicates the formation of AgNPs.
Fourier Transform Infra Red Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Tunneling Electron Microscopy (TEM) and Dynamic Light Scattering Spectroscopy (DLSS) are techniques employed for characterization and morphological analysis of synthesized silver nanoparticles. Antibacterial, antifungal and antiparacitic applications of synthesized AgNPs have been also discussed. It is concluded that AgNPs synthesized by green way has great potency towards both Gram-negative and Gram-positive bacteria. Moreover, green synthesis of silver nanoparticles is a nonhazardous , eco-friendly, economic and safe technique and will envisaged better option for synthesis of AgNPs.
KEYWORD
Silver nanoparticle, green synthesis, plant extract, antimicrobial and antibacterial properties