SILVER NANOPARTICLES SYNTHESIS WITH DIFFERENT CONCENTRATIONS OF POLYVINYLPYRROLIDONE

Abstract

The effect of poly(N-vinylpyrrolidone) (PVP) concentration on the synthesis and properties of silver nanoparticles (AgNPs) was investigated. Nanoparticles have been prepared by a chemical reduction method from the aqueous solution of silver nitrate and PVP as a stabilizing agent in the presence of sodium borohydride as a reducing agent. The nanosized silver colloids have been characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), UV-Vis spectroscopy and transformed infrared spectroscopy (FT-IR). Dynamic Light Scattering (DLS) measurements using Zetasizer Nano ZS were applied to size estimation of AgNPs. The results confirmed that silver nanoparticles were formed in each sample independently of PVP content, however the stabilizer concentration in range of 1.0 % to 10.0 % leads to the synthesis of AgNPs with a size in the narrow range of nano-scale and small amounts of larger clusters. The PVP content had a significant influence on silver nanoparticles morphology and optical properties. (Received July 27, 2012; Accepted October 2, 2012)