Ultrasound-assisted in the synthesis of silver nanoparticles using sodium alginate mediated by green method

Abstract

Silver nanoparticles (Ag-NPs) have been successfully synthesized using ultrasound irradiation in the sodium alginate media. AgNO3 and ultrasound irradiation have been used as silver precursor and physical reducing agent to accelerate the synthesis of Ag-NPs. The presence of Ag-NPs can be detected from the changing color of the suspensions. The silver ion reduction was confirmed through the surface plasmon resonance absorption at around 446 nm. The spherical shape and an average diameter of 24. 59 nm were observed by using Transmission Electron Microscopy. The XRD pattern was assigned that the sodium alginate/Ag-NPs is crystalline in nature with fcc planes. The FT-IR spectra shows that the Ag-NPs do not appear many different with sodium alginate due to van der Waal forces. Therefore, this Ag-NPs using sodium alginate can be an alternative in the metal nanoparticles synthesis due to green and speedy method. Moreover, these nanoparticles can apply in many applications such as anti-microbial and sensor devices.