Green Synthesis of Silver nanoparticles and Antioxidant, Antibacterial Studies in Fruit Aqueous Extract of Pterolobium hexapetalum (Roth.) Sant and Wagh.

Author(s): Battala Subramanyam and Nimmanapalli Yasodamma*

Abstract: plant mediated synthesis of nanoparticles has Significant application in biomedicine due to its novel properties and its eco-friendly nature. The present study deals with the biosynthesis of stable silver nanoparticles (SNPs) from fruit aqueous extract of Pterolobium hexapetalum. The synthesized nanoparticles are characterized by UV–VIS spectroscopy, Zeta potential, FTIR, XRD, with TEM and EDAX. Colour change, observed from Gray to light brown indicates the formation of nanoparticles and UV–VIS surface plasmonresonance spectroscopy observed at 420 nm further confirmed the synthesized nanoparticles as SNPs. FTIR spectroscopic studies confirm that phenols and proteins of fruit extract is mainly responsible for capping and stabilization of synthesized SNPs. The XRD data shows crystalline nature of nanoparticles and EDAX measurements reveal the 42.75 % of Ag metal. Zeta potential at -23.7 mV, negitive value indicates the high stability of Nanoparticles. TEM microscopic analysis revealed that the size of synthesized SNPs ranging from 14.9 to 34.1 nm with spherical shape. Further, Antimicrobial studies of AgNPs showed highest Zone of Inhibition against Staphylococcus aureus (22.25mm) among bacterial strains. Antioxidant activity of AgNPs shows 71.67 %.

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