Synthetic method of copper nano-particles of different shapes

A technology of copper nanoparticles and synthesis methods, applied in the field of nano-metal materials, can solve the problems of obtaining copper nanoparticles, complex preparation process, and high equipment requirements

Inactive Publication Date: 2014-05-21
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By searching relevant patent documents, it was found that the patent No. 20130030322.6 reported a method for preparing nano-copper cube particles. The method uses copper sheets as anodes and metal substrates as cathodes. 2+ , organic weak acid and surfactant electroplating solution, using the electrodeposition method to prepare nano-copper cubic particles on the metal substrate, although the cubic nano-copper particles with good dispersion can be prepared by using this electrochemical method, but the preparation process is more complicated , higher requirements for equipment
In addition, this method can only synthesize copper nanoparticles with a cubic shape, and cannot obtain other copper nanoparticles with different shapes by changing the experimental conditions, which has certain limitations.

Method used

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  • Synthetic method of copper nano-particles of different shapes
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  • Synthetic method of copper nano-particles of different shapes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve the copper salt compound cupric chloride dihydrate in distilled water, prepare 50ml cupric chloride dihydrate solution with a concentration of 0.2M, and ultrasonicate for 5 minutes, place in an oil bath and heat to a temperature of 60°C for stirring;

[0021] Dissolve L-ascorbic acid in distilled water to prepare 50ml of 0.7M L-ascorbic acid solution, add the configured L-ascorbic acid solution dropwise to the configured copper chloride dihydrate solution under stirring, at a temperature of 60°C, After the L-ascorbic acid solution was added dropwise, the stirring was continued for 14 hours to obtain a mixed solution;

[0022] The mixture was centrifuged at 11500rpm for 10 minutes, and the obtained precipitate was washed 4 times with absolute ethanol, and the washed product was dried in a vacuum oven at a temperature of 30°C for 12 hours, and the dark brown dry product obtained was copper nanoparticles .

Embodiment 2

[0024] Dissolve the copper salt compound copper sulfate in distilled water, prepare 50ml of copper sulfate solution with a concentration of 0.2M, ultrasonicate for 5 minutes, place in an oil bath, heat to a temperature of 75°C, and stir;

[0025] Dissolve L-ascorbic acid in distilled water to prepare 50ml 0.9M L-ascorbic acid solution, add the prepared L-ascorbic acid solution dropwise to the prepared copper sulfate solution under stirring, and wait for the L- After the ascorbic acid solution was added dropwise, the stirring was continued for 14 hours to obtain a mixed solution;

[0026] The mixture was centrifuged at 11,500 rpm for 10 minutes, and the obtained precipitate was washed 4 times with absolute ethanol, and the washed product was dried in a vacuum oven at 30° C. for 12 hours, and the obtained black-brown dried product was copper nanoparticles.

Embodiment 3

[0028] Dissolve the copper salt compound cupric chloride dihydrate in distilled water, prepare 50 ml of cupric chloride dihydrate solution with a concentration of 0.2M, and ultrasonicate for 5 minutes, place it in an oil bath, heat to a temperature of 85°C, and stir;

[0029] Dissolve L-ascorbic acid in distilled water to prepare 50ml of 1.1M L-ascorbic acid solution, add the configured L-ascorbic acid solution dropwise to the configured copper sulfate solution under stirring, and wait for L- After the ascorbic acid solution was added dropwise, the stirring was continued for 14 hours to obtain a mixed solution;

[0030] The mixture was centrifuged at 11,500 rpm for 10 minutes, the obtained precipitate was washed 4 times with absolute ethanol, and the washed product was dried in a vacuum oven at a temperature of 30°C for 12 hours, and the obtained black-brown dried product was copper nanoparticles.

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Abstract

The invention provides a synthetic method of copper nano-particles of different shapes. The method comprises the following steps: selecting one of copper salt compound cupric sulfate, copper chloride dihydrate and copper nitrate, using L-ascorbic acid as a reducing agent, dropwise dripping L-ascorbic acid solutions of different concentrations in a copper salt compound water solution, controlling the temperature, continuously stirring to obtain the copper nano-particles of different shapes, and realizing the control to the shapes of the copper nano-particles by changing the concentration of the L-ascorbic acid added in the system. The method has the characteristics of few raw material kinds, simple and convenient operation method, simple process, environmental protection and the like, and can control the shapes of the copper nano-particles directionally, and the obtained copper nano-particles are good in dispersivity and stable, and do not settle for a long time in the system.

Description

technical field [0001] The invention relates to a method for synthesizing copper nanoparticles with different shapes, belonging to the technical field of nanometer metal materials. Background technique [0002] Due to the characteristics of small size, large specific surface area, high surface energy and catalytic activity, and quantum size effect, copper nanoparticles show novel characteristics in optical, electrical, magnetic and chemical catalysis. As an important industrial raw material, copper nanoparticles can greatly reduce industrial costs in the production of high-grade lubricants, conductive pastes, high-efficiency catalysts, high-conductivity, and high-ratio alloys instead of precious metal particles. Therefore, high-quality copper nanoparticles The preparation has very important scientific research significance and practical value. [0003] Copper nanoparticles have spherical, triangular thin-layer, tetrahedral and cubic shapes. The surface energy and activity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 范晓芸王贞王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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