Synthesis of high concentration silver nanoparticles colloid

Abstract

This research aims to study the synthesis of high concentration silver nanoparticles and to develope the tubular flow reactor for continuous production of large amount of silver nanoparticles. The highly concentrated silver nanoparticles were synthesized by chemical reduction of silver salt with a reducing agent in a tubular flow reactor. The tubular flow reactor was continuously produced silver nanoparticles at 240 liters per hour at the silver nanoparticles concentration of 1,000-10,000 ppm. The synthesized silver nanoparticles were very stable. These highly concentrated silver nanoparticles had small size and narrow size distribution. The transmission electron microscopy images of synthesized silver nanoparticles reveal an average diameter of 10 nm. Moreover, the production cost of these highly concentrated silver nanoparticles was significantly lower than that of the imported commercial products. In addition, high concentration silver nanoparticles show antibacterial activity without any toxicological effects.