Method for preparing spherical silver nano granule

The invention discloses a method for preparing spherical silver nanoparticles, which comprises the following steps: evenly mixing a silver nitrate clearing solution, a reducer clearing solution and a stabilizing agent clearing solution of anhydrous low mass molecule alcohols; stirring the mixture at a temperature of between 70 and 80 DEG C and refluxing the product to obtain a silver nanoparticlecolloidal solution; and vaporizing or removing the low mass molecule alcohols, and drying the remaining substance to obtain the spherical silver nanoparticles with the particle size not more than 15 nanometers. A reaction system of the invention has simple process, saves raw materials, reduces links and improves preparation efficiency; in the reaction system, the anhydrous low mass molecule alcohols are taken as solvent to replace the prior water solution to prepare the anhydrous spherical silver nanoparticles; therefore, the invention discloses a method for preparing the anhydrous spherical silver nanoparticles with