Method for preparing multi-metal nanoparticles by one-step coreduction
A multi-metal and nanoparticle technology, applied in nanotechnology and other directions, can solve problems such as inability to large-scale production, harsh and complex experimental conditions, application limitations, etc., to achieve good experimental repeatability, simple and fast experimental operation.
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[0019] Example 1
[0020] Add 0.0648mL HAuCl with a concentration of 0.04g / mL 4 Solution and 0.0625mL of H with a concentration of 0.04g / mL 2 PdCl 6 The solution is dissolved in 50mL deionized water, at this time the total concentration of metal ions is 2.5×10 -4 mol / L, HAuCl 4 With H 2 PdCl 6 The molar ratio between them is 1:1, the reaction system is stirred and heated to 100°C to make the solution boil, and a brown transparent solution is obtained. Then, 1 mL of sodium citrate solution with a concentration of 2 wt% was added to the reaction system. After keeping the solution boiling for 10 minutes, stop heating and continue stirring to cool to room temperature, such as figure 1 As shown, spherical-like Au / Pd binary metal nanoparticles with an average particle diameter of 34.4 nm are obtained.
Example Embodiment
[0021] Example 2
[0022] Add 0.0648mL HAuCl with a concentration of 0.04g / mL 4 Solution and 0.0625mL of H with a concentration of 0.04g / mL 2 PdCl 6 The solution is dissolved in 50mL deionized water, at this time the total concentration of metal ions is 2.5×10 -4 mol / L, HAuCl 4 With H 2 PdCl 6 The molar ratio between them is 1:1, the reaction system is stirred and heated to 100°C to make the solution boil, and a brown transparent solution is obtained. Then, 3 mL of sodium citrate solution with a concentration of 2 wt% was added to the reaction system. After keeping the solution boiling for 10 minutes, stop heating and continue stirring to cool to room temperature, such as figure 2 As shown, flower-shaped Au / Pd binary metal nanoparticles with an average particle diameter of 28.6 nm are obtained.
Example Embodiment
[0023] Example 3
[0024] Add 0.0648mL HAuCl with a concentration of 0.04g / mL 4 Solution and 0.0625mL of H with a concentration of 0.04g / mL 2 PdCl 6 The solution is dissolved in 50mL deionized water, at this time the total concentration of metal ions is 2.5×10 -4 mol / L, HAuCl 4 With H 2 PdCl 6 The molar ratio between them is 1:1, the reaction system is stirred and heated to 100°C to make the solution boil, and a brown transparent solution is obtained. Then 4 mL of sodium citrate solution with a concentration of 2 wt% was added to the reaction system. After keeping the solution boiling for 10 minutes, stop heating and stir to cool to room temperature, such as image 3 As shown, dendritic Au / Pd binary metal nanoparticles are obtained.
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