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Method for preparing high-dispersion precious metal and alloy nanoparticles thereof

A technology of alloy nanoparticles and precious metals, which is applied in the field of preparation of precious metal alloy nanoparticles, can solve the problems of difficult centrifugation, difficult control of components, and small applicability range, and achieves the advantages of convenient process, low cost, and small particle size distribution range. Effect

Inactive Publication Date: 2012-08-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of ethylene glycol as a solvent to prepare alloy nanoparticles has a small range of applicability, poor monodispersity, difficult to control the composition, and difficult centrifugation, which consumes a large amount of acetone or ethanol solvent to dilute the synthesized solvent system.

Method used

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  • Method for preparing high-dispersion precious metal and alloy nanoparticles thereof
  • Method for preparing high-dispersion precious metal and alloy nanoparticles thereof
  • Method for preparing high-dispersion precious metal and alloy nanoparticles thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 50 mL of ethylene glycol and add it into a three-necked flask, then add 0.5 mL of oleic acid and oleylamine, and stir and mix evenly at room temperature under an inert atmosphere such as argon. Weigh 0.5mmol of copper acetate and dissolve in 5mL of ultrapure water, weigh 0.5mmol of palladium acetate and dissolve in 5mL of acetone solution, add the two solutions into the mixed solution of ethylene glycol, and then heat up to 120 ℃, keep the temperature for 30 minutes, then continue to heat up to 200 ℃, keep the temperature here for 90 minutes. After the reaction was completed, it was naturally cooled to room temperature, then 50 mL of n-hexane was added, and the mixture was transferred to a separatory funnel for static separation. Take the upper layer solution and remove n-hexane in a rotary evaporator to obtain a viscous nanoparticle solution. Then add ethanol and a small amount of normal hexane to wash, centrifugal drying obtains average particle diameter at 1.9 ...

Embodiment 2

[0033]Take 50 mL of ethylene glycol and add it into a three-necked flask, then add 1 mL of oleic acid and oleylamine, and stir and mix evenly at room temperature under an inert atmosphere such as argon. Weigh 0.5mmol of copper acetate and dissolve in 5mL of ultrapure water, weigh 0.5mmol of palladium acetate and dissolve in 5mL of acetone solution, add the two solutions into the mixed solution of ethylene glycol, and then heat up to 120 ℃, keep the temperature for 30 minutes, then continue to heat up to 200 ℃, keep the temperature here for 90 minutes. After the reaction was completed, it was naturally cooled to room temperature, then 50 mL of n-hexane was added, and the mixture was transferred to a separatory funnel for static separation. Take the upper layer solution and remove n-hexane in a rotary evaporator to obtain a viscous nanoparticle solution. Then add ethanol and a small amount of normal hexane to wash, centrifugal drying obtains average particle diameter at 3 nanom...

Embodiment 3

[0035] Take 50 mL of ethylene glycol and add it into a three-necked flask, then add 1 mL of oleic acid and oleylamine, and stir and mix evenly at room temperature under an inert atmosphere such as argon. Weigh 0.5mmol of copper acetate and dissolve in 5mL of ultrapure water, weigh 0.5mmol of palladium acetate and dissolve in 5mL of acetone solution, add the two solutions into the mixed solution of ethylene glycol, and then heat up to 120 ℃, keep the temperature for 30 minutes, then continue to heat up to 200 ℃, keep the temperature here for 90 minutes. After the reaction was completed, it was naturally cooled to room temperature, then 50 mL of n-hexane was added, and the mixture was transferred to a separatory funnel for static separation. Take the upper layer solution and remove n-hexane in a rotary evaporator to obtain a viscous nanoparticle solution. Then add ethanol and a small amount of normal hexane to wash, centrifugal drying obtains average particle diameter at 4 nano...

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Abstract

The invention relates to a method for preparing a high-dispersion precious metal and alloy nanoparticles thereof, which comprises: 1) uniformly stirring glycol and specific surfactant in a certain proportion in an inert atmosphere to prepare milky emulsion; 2) adding solution of precursor of the precious metal into the mixed solution, heating the resulting solution to a given temperature, keepingthe temperature for a certain time period with stirring, cooling to room temperature, adding nonpolar solution and extracting; and 3) performing the rotary evaporation of upper solution to remove solvent, washing with ethanol or mixed solution of ethanol and normal hexane, centrifuging and obtaining the high-dispersion precious metal and the alloy nanoparticles thereof. The nanoparticles preparedby the method have uniform particle size and high monodispersity, and can be separated easily; the alloy is controllable in particle size and composition; the process is simple; the preparation cost is low; the solvent system is cheap; and the method is widely applicable and can realize large-scale preparation easily.

Description

technical field [0001] The invention relates to noble metal and alloy nanoparticles thereof, in particular to a preparation method of highly monodispersed noble metal alloy nanoparticles with controllable particle size and composition. Background technique [0002] Due to their good catalytic, optical, chemical inertness and other excellent characteristics, noble metal nanoparticles have attracted extensive attention from many researchers in the industry and scientific research circles in recent years, and have been widely used in the energy field, such as fuel cells; chemical industry, Such as liquid phase hydrogenation reaction; data storage field and optical field. Among them, alloy nanoparticles with uniform particle size, high degree of monodispersity, or controllable composition have extremely important applications in the fields of magnetic storage, catalysis, and optics due to their excellent physical and chemical properties. [0003] So far, scientists, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/10
Inventor 马丁尹振包信和
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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