Patent ID: 8721763
Filing Date: 2014-05-13
Classification: B22F,B82Y,C22B,Y10S

Abstract:
1. A method for separating metal nanoparticles from colloidal metal solution, comprising: providing a colloidal metal solution, including a plurality of metal nanoparticles; mixing a precipitating agent with the colloidal metal solution for maintaining a pH of the colloidal metal solution in a specific value; keeping the colloidal metal solution stationary with no external forces applied for a static time at an environmental temperature, such that the metal nanoparticles precipitate from the colloidal metal solution, and the colloidal metal solution forms a supernatant and a precipitating liquid; separating a precipitate from the precipitating liquid by a filtering process; and liquid sprinkling the precipitate by a first solvent to obtain the metal nanoparticles, wherein the precipitating agent is a third solvent including a compound, and the compound is dissolved in the third solvent and is selected from the group consisting of methylamine (CH