Green Synthesis of Copper Nanoparticles Using Leaf Extract of Phyllanthus niruri Lin. and Study of Its Antimicrobial Activity

Abstract

Abstract: Nanoscience and Nanotechnology are the study and application of extremely small things and can be used across all the other science fields such as chemistry, biology, physics and engineering. Green synthesis of nanoparticles using plant extract is a promising and ecofriendly approach, often yielding particles with unique properties. The present study deals with biosynthesis, characterization and antimicrobial activity. Of copper sulphate nanoparticles using the leaf extract of Phyllanthus niruri. In this report, aqueous phase green synthesis of specifically copper sulphate nanoparticles using leaf extract (both fresh and dry leaf) aqueous leaf extract of leaf was used for the synthesis of nanoparticles. The synthesised nanoparticles of copper sulphate were confirmed by color change when 25ml of 1% aqueous copper sulphate solution was added to 5ml og plant extract. The synthesised nanoparticles were charecterised by UV-Visible spectroscopy, SEM (Scanning Electron Microscopy), and XRD (X-Ray Diffraction). The UV-VIS spectroscopy showed the absorption peak at 378nm for fresh leaf and 376nm for dry leaf. SEM was used to study the morphological features that was predominately spherical and aggregated into large structure with not welldefined morphology and the size347nm,358nm,400nm,457nm, for fresh leaf 1.13µm,1.14µm,771nm,935nm for dry leaf. XRD using this the particle size and nature of nanoparticle was found the average diameter of copper nanoparticles is 12.8nm for dry leaf and 6.10nm for fresh leaf. antimicrobial activity was done using different bacterial and fungal species, in antibacterial activity St. aureus show maximum inhibition that is 75% in fresh leaf and 63%in dry leaf while compare to others, S. typhi showed 0% inhibition it was not resistant towards P.niruri. In antifungal activity F.oxysporum has shown maximum inhibition that is 77% for both fresh and dry leaf, penicillium atramentosum showed 0% inhibition it was not resistant towards P.niruri