PREPARATION OF FINE NOBLE METAL PARTICLE

摘要

PURPOSE:To stably disperse and form fine particles of a reduced noble metal in a liquid by mixing the salts of the noble metal and water as well as a PVA- PVP copolymer, then adding a reducing agent thereto. CONSTITUTION:The water soluble salts of the noble metal and PVA (polyvinyl alcohol)-PVP (polyvinyl pyrolidone) copolymer as protective colloid are added and mixed to and with the water and thereafter, methanol and NaOH are added as the reducing agent for the salts of the noble metal to the mixture to reduce the metal. The extremely fine particles of the noble metal are dispersed and formed in a stable state in the liquid.