Antibacterial and dye degradation potential of zero‐valent silver nanoparticles synthesised using the leaf extract of Spondias dulcis

Abstract

The present study reports a simple and low cost synthesis of zero-valent silver nanoparticles (ZVSNPs) from silver nitrate using the leaf extract of Spondias dulcis. The ZVSNPs showed a unique peak at 420 nm in UV-vis spectrum. The SEM image portrayed cuboidal shaped particles. The EDX spectrum designated the elemental silver peak at 3 keV. In XRD, a sharp peak at 32.47° denoted the existence of (1 0 1) lattice plane and the average crystallite size was calculated as 48.61 nm. The lattice parameter was determined as 0.39 nm. The FTIR spectra of the leaf extract and ZVSNPs showed shifts in the specific functional group bands which ascertained the involvement of phytoconstituents in the formation and capping of nanoparticles. The average hydrodynamic size was measured as 59.66 nm by DLS method. A low PDI, 0.187 witnessed the monodispersity. A negative zeta potential value of −15.7 mV indicated the negative surface charges of the nanoparticles. The bactericidal action of ZVSNPs was demonstrated against two pathogens S.typhimurium and E.coli during which a dosage dependent zone of inhibition results was observed. Additionally, the catalytic potential of ZVSNPs was examined for the degradation of methylene blue dye in which an accelerated degradation of the dye was observed.

Eco-friendly silver nanoparticles (AgNPs) fabricated by green synthesis using the crude extract of marine polychaete, Marphysa moribidii: biosynthesis, characterisation, and antibacterial applications

“…Noble metals are known to exhibit unique optical properties due to the property of SPR ( Yadav et al., 2018 ). The optical properties of biosynthesised AgNPs were assessed by measuring the absorption spectrum using the UV-Vis spectrophotometer over a wavelength range of 300–600 nm, as shown in Figure 3 .…”

Eco-friendly synthesis of silver nanoparticles using leaf extract of Flemingia wightiana: spectral characterization, antioxidant and anticancer activity studies

“…Average hydrodynamic size, PDI and zeta potential value of Ipomoea digitata flower extract synthesized AgNPs were found to be 111 nm, 0.197 and − 25.1 mV respectively [61]. Average hydrodynamic size, PDI and zeta potential value of AgNPs synthesized using leaf extract of Spondias dulcis were found to be 59.66 nm, 0.187 and − 15.7 mV respectively [63].…”

In situ generation of silver and silver oxide nanoparticles on cotton fabrics using Tinospora cordifolia as bio reductant

“…An alternate method has to be searched by the scientists to overcome these problems. On comparison with earlier physical and chemical methods, green synthesis has found to be a faster, of low cost and environmentally benign method for the synthesis of nanomaterials [9][10][11].…”