Preparation of Nano-sized Silver with Different Particle Size Based on Liquid Phase Reduction Method

The different particle size nano-Ag can be applied in various fields.Nano-Ag particles with average diameters of 15~86nm were prepared by liquid-phase reduction method.The morphology and crystal structure of nano-Ag samples were analyzed,the effects of the experimental conditions on particle size of nano-Ag samples were discussed.The results show that the nano-Ag with different average particle size can be prepared by changing experiment conditions.The structure of nano-Ag is cubic and the shape is approximately spherical.The particle size of nano-Ag increases with increasing concentration of reactant silver nitrate,reaction temperature and the time of charging the reactant.Type and dosage of surfactants have influence on particle size,the addition of anionic surfactant is conducive to formation of smaller particle.On contrary,cationic surfactant tends to form bigger particle.In addition,the more the dispersantis added,the smaller the particle size is.The conclusions have some guiding significance for the practical application of silver nanoparticles.