METHOD FOR PREPARING A HIGH CONCENTRATION GOLD-SILVER ALLOY NANOPARTICLE USING POLYETHYLENEIMINE, WHICH IS ABLE TO REGULATE THE CONTENT OF GOLD AND SILVER ACCORDING TO THE PURPOSE

摘要

PURPOSE: A method for preparing gold-silver alloy nanoparticles is provided to synthesize a large amount of gold-silver alloy nanoparticle through one-step using polyethyleneimine.;CONSTITUTION: A method for preparing gold-silver alloy nanoparticles comprises: a step of reacting polyethyleneimine in an aqueous mixture containing chlorauric acid(HAuCl4) and silver nitrate(AgNO3); a step of dissolving the silver chloride generated through reaction of the chlorauric acid(HAuCl4) and silver nitrate(AgNO3) in the aqueous mixture; and a step of heating the mixture and stirring. The particle size of the gold-silver alloy nanoparticle is 1-10 nm. The gold-silver alloy nanoparticle is used as a catalyst in reduction of 4-nitrophenol.;COPYRIGHT KIPO 2013