Nuclear chemistry

Engineering

Transmission electron microscopy

Nanoparticle

Antimicrobial

Materials science

Moringa

Silver nanoparticle

Chemical engineering

Food science

Surface plasmon resonance

Nanotechnology

Organic chemistry

Composite material

Medicine

Chemistry

Scanning electron microscope

Fourier transform infrared spectroscopy

Traditional medicine

Advances in Natural Sciences Nanoscience and Nanotechnology

In this study we report on the synthesis of silver nanoparticles (AgNPs) from the leaf extracts of Moringa oleifera using sunlight irradiation as primary source of energy, and its antimicrobial potential. Silver nanoparticle formation was confirmed by surface plasmon resonance at 450 nm and 440 nm, respectively for both fresh and freeze-dried leaf samples. Crystanality of AgNPs was confirmed by transmission electron microscopy, scanning electron microscopy with energy dispersive x-ray spectroscopy and Fourier transform infrared (FTIR) spectroscopy analysis. FTIR spectroscopic analysis suggested that flavones, terpenoids and polysaccharides predominate and are primarily responsible for the reduction and subsequent capping of AgNPs. X-ray diffraction analysis also demonstrated that the size range of AgNPs from both samples exhibited average diameters of 9 and 11 nm, respectively. Silver nanoparticles showed antimicrobial activity on both bacterial and fungal strains. The biosynthesised nanoparticle preparations from M. oleifera leaf extracts exhibit potential for application as broad-spectrum antimicrobial agents.

Green synthesis of silver nanoparticles from <i>Moringa oleifera</i> leaf extracts and its antimicrobial potential

Green synthesis of silver nanoparticles from Moringa oleifera leaf extracts and its antimicrobial potential