Biomimetic synthesis of Ag@Fe bimetallic nanoparticles from Palmyra sprouts extract and their antibacterial, photocatalytic degradation of malachite green

Abstract

The present study aimed to biomimetic synthesis of silver-iron bimetallic nanoparticles (Ag@Fe BMNPs) was achieved by bio-reduction of silver nitrate (AgNO3) and Ferric(III) nitrate Fe(NO3)3 using Palmyra sprout (PS) extract. The synthesized PS-Ag@Fe BMNPs were characterized by UV–Visible spectrophotometer, Fourier-transform infrared (FT-IR) spectroscopy, High-resolution scanning electron microscope (HR-TEM), Field-emission scanning electron microscope (FE-SEM), vibrating sample magnetometer (VSM), and X-ray diffraction (XRD), respectively. The UV–Vis spectra of PS-Ag@Fe BMNPs showed a broad absorption peak at 310 nm and FT-IR represented bioactive functional groups. The results of the XRD pattern confirmed the crystalline nature of PS-Ag@Fe BMNPs. HR-TEM and FE-SEM results prove the spherical shape of PS-Ag@Fe BMNPs and the presence of Ag and Fe peaks at 3.0, 6.4, and 7.2 keV, respectively. The photocatalytic efficiency of PS-Ag@Fe BMNPs against malachite green (MG) showed 91.23 % decolorization within 180 min of direct sunlight irradiation. In addition, antibacterial properties of PS-Ag@Fe BMNPs against human bacterial pathogens was evaluated. Hence, the green synthesized PS-Ag@Fe BMNPs were confirmed to be a potential substance for biomedical and environmental remediation.