Abstract

Syed Julkar Nine , Md. Akkas Uddin, Md. Sabur Ahammad Khan , Arup Kumer Roy and M. K. Mohammad Ziaul Hyder ^*

This present study aimed toward the bio-mediated synthesis of silver nanoparticles (AgNPs) by utilizing aqueous leaf extract of Lantana camera with silver nitrate (AgNO3) as the precursor. The color transformation from light yellow to the dark brown of the reaction media was initially inveterate of synthesized silver nanoparticles which further examined by observing the characteristics Surface Plasmon Resonance (SPR) band peak of silver nanoparticles at 458 nm. Presence of any functional groups in silver nanoparticles were determined using Fourier Transformed Infrared (FT-IR) spectroscopy with the stretch of bonds of functional groups. Surface morphology and dispersity of nanoparticles were characterized with a Field-Emission Scanning Electron Microscope (FE-SEM) and the spherical poly dispersed nanoparticles were observed with the particle size in between 15 to 35 nm. The crystallinity and purity of AgNPs were revealed by X-ray Diffraction (XRD) analysis and Energy Dispersive Spectroscopy (EDS), respectively. Photocatalytic activity of AgNPs was observed against Methylene blue (MB) dye under solar light irradiation. The AgNPs efficiently degraded the dye by nearly 95% by the exposure time. The degradation of dye with time was fitted to pseudo-first-order and pseudo-second-order kinetic models where the data best fit the pseudo-first-order kinetic model. Synthesized AgNPs showed moderate anti-microbial activity against four gram-positive and gram-negative bacterial strain while they showed very good activity against two anti-fungal strains.

Dye Degradation; Green Synthesis; Methylene Blue; Silver Nanoparticles

[ View HTML Full Text]