Preparation method of stable nanogold sol

Abstract

The invention discloses a preparation method of stable nanogold sol, which comprises the following steps: mixing a reducing agent solution, a stabilizer solution and deionized water to obtain a mixed solution A; mixing a chloroauric acid solution, a stabilizer solution and deionized water to obtain a mixed solution B; if a high-concentration and large-system mixed solution is prepared, the mixed solution A is subjected to heating treatment and a chloroauric acid solution is added for reaction, otherwise, the mixed solution B can be subjected to heating treatment and a reducing agent solution is added for reaction, and the mixed solution A can be subjected to heating treatment and a chloroauric acid solution is added for reaction; after the reaction is finished, cooling is conducted, nanogold sol is obtained, and the obtained nanogold sol is stored; according to the concentration of the prepared mixed solvent and the size of the system, the reagent adding sequence in the preparation process is changed, and the particle size, the morphology, the dispersity and the stability of the nanogold sol are regulated and controlled.

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