Method for Obtaining Metallic Nanoparticles
The present invention relates to a method for obtaining nanoparticles of a metal selected from the group consisting of Ag, Pt, Pd and Au, which comprises the steps of: a) preparing an aqueous solution of a metallic salt and an aqueous citrate-salt mother solution, respectively; b) preparing an aqueous solution of dithionite salt, taking, as solvent, a portion of the aqueous citrate-salt mother solution obtained in step a); c) heating a portion of the aqueous citrate-salt mother solution to a temperature of between 40 and 70 DEG C; d) mixing the metallic-salt solution of step a) with the solution of step c) once said temperature in step c) has been reached; and e) mixing the dithionite solution prepared in step b) with the solution obtained in step d); the dithionite:metal ratio being between 0.03*n and 2*n, in which n is the oxidation state of the metal of the metallic salt used.
GARCIA GUEELL ALEIX [ES]; SANZ CARRASCO FAUSTO [ES]; GUTIERREZ GONZALEZ JOSE MARIA [ES]; GONZALEZ AZON MARIA DEL CARMEN [ES]
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