Woodfordia Fruticosa Flower Extract Mediated Silver Nanoparticles and its Prodigious Potential as Antioxidant, Antibacterial and Photocatalyst

Abstract

Synthesis and characterization of Woodfordia fruticosa flowers mediated silver nanoparticles (Wf-AgNPs) was reported and its biological activities, including antioxidant, antibacterial and photo catalytic degradation of methylene blue under direct sunlight irradiation, were evaluated. UV-Vis spectral observation of the synthesized Wf-AgNPs showed Surface Plasmon Resonance (SPR) peak at 460 nm. Functional groups of W. fruticosa flower extract that is responsible for the reduction of silver ions were identified with Fourier Transform Infra-Red (FTIR) spectroscopy and the face-centered cubic (fcc) phase structure of synthesized Wf-AgNPs was determined using X-Ray Diffraction (XRD) analysis. The spherical structure of Wf-AgNPs was observed with SEM analysis and the average particle size was found to be 21 nm as determined by Image J software. The potential antioxidant activity Wf-AgNPs was assessed using DPPH, ABTS, nitric oxide scavenging activity and reducing power assay. The significant difference in the antioxidant activity of Wf-AgNPs was observed compared to the standard antioxidant, ascorbic acid. The synthesized Wf-AgNPs showed effective inhibitory activity against Staphylococcus aureus (gram-positive) and Escherichia coli (gram-negative) bacteria. Wf-AgNPs exhibited better catalytic activity in the degradation of methylene blue dye.