Research on the Preparation of Silver Nanoparticles by Chemical Reduction Method

The synthesis of silver nanoparticles (AgNPs) by chemical reduction method was introduced in this chapter. The silver ammonia solution was taken as precursor, hydrazine hydrate was taken as reducing agent, and polyvinyl pyrrolidone (PVP) was taken as protective agent. This chapter mainly researched on ultra-fine silver powder prepared by chemical reduction method. The synthetic nano silver particle size was very small, which could be applied to conductive ink as the filler. The results showed that the comprehensive performance of AgNPs was optimal under the following synthetic conditions: the reaction temperatures was 50 °C, the mass fraction ammonia is 2%. The characterization was as follows: the average particle size was 157.1 nm, the surface of AgNPs was coated by PVP, and the UV-vis absorption spectra were measured at 427 nm.