Method for manufacturing nano-silver

The present invention is nano silver preparing process and belongs to the field of nano material preparing technology in radiochemistry. The technological process includes adopting silver nitrate as silver source, isopropanol as oxidant clearer in water solution, hydrophilic suitable for PVA for controlling the crystal kernel growth speed and grain size and electronic accelerator to produce electron beam for irradiation treatment; washing irradiated solution, centrifugal separation and stoving to obtain black nano silver powder. The present invention has simple technological process, short production period, no pollution and high safety, and the prepared nano silver grain is spherical, homogeneous in size and good in dispersivity.