MANUFACTURE OF HIGH PURITY SILVER NANO-POWDER WITH REDUCING AGENT

摘要

A preparation method of high purity silver nano powder is provided to produce the high purity silver nano powder from waste liquid of photographs by using a reduction precipitation method. A preparation method of high purity silver nano powder comprises the steps of: (S1) adding oxygenated water to waste liquid of photographs, heating at 70°C for 3 hours and cooling it; (S2) adding Hydrazine Hydrate as a reducing agent with dispersant to it and precipitating silver by reduction; (S3) and washing and drying the silver powder after separating the silver powder generated through a centrifugal separator.