GREEN SYNTHESIS OF SILVER NANOPARTICLES USING AERIAL PARTS EXTRACT OF ECHINOCHLOA COLONA AND THEIR CHARACTERIZATION

Lakshman Kumar D.*, Siva Sankar S., Dr. Venkatesh P., Dr. Hepcy Kalarani D.

ABSTRACT

In the present work, the silver nano particles (AgNPs) are synthesized by ecofriendly bio reduction method. The aqueous extract of Echinochloa colona plant aerial parts were used as reducing and stabilizing agent. The formation of AgNPs was initially identified by change in colour from light yellow to dark brown. The UV visible spectra showed the characteristic surface Plasmon resonance peak of synthesized AgNPs between 380 and 460 nm. X-ray diffraction analysis revealed the crystalline nature of AgNPs. The energy dispersive X-ray spectroscopy confirms the metallic nature of silver. Field emission scanning electron microscopy (FESEM) images showed the spherical nature of the particles where as size distribution was measured by Zeta sizer, which revealed that majority of size distribution of AgNPs were in the range of 50-70 nm.

Keywords: Silver nano particles, FESEM, XRD, Green synthesis, Echinochloa colona.