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Preparation method of carbon-coated copper nanoparticles with core-shell structures

A core-shell structure and copper nanotechnology, which is applied in the field of preparation of carbon-coated copper nanoparticles, can solve the problem of high cost and achieve the effect of low cost, simple preparation steps and easy realization

Inactive Publication Date: 2012-12-05
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing carbon-coated copper nanoparticles with a core-shell structure, and the purpose is to solve the problem that the existing preparation method requires special equipment, resulting in high cost

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  • Preparation method of carbon-coated copper nanoparticles with core-shell structures

Examples

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Embodiment 1

[0023] Add copper nitrate to ethylene glycol while stirring, heat the mixed solution of copper nitrate and ethylene glycol to 150°C to completely dissolve copper nitrate in ethylene glycol to form a light blue solution, and the mass percentage of copper nitrate to the solution is 5 %. Slowly drop ammonia water with a mass ratio of ammonia to copper nitrate of 2:1 into the light blue solution while stirring to obtain a mixed solution of blue flocculent precipitates.

[0024] Soluble starch was dissolved in deionized water to form a starch solution, and a soluble starch solution with a solute mass percentage of 5% was prepared. Take 10ml of soluble starch solution and slowly drop it into the mixed solution of blue flocculent precipitate. After the reaction is complete, a viscous liquid is obtained. Put the viscous liquid into an oven at a drying temperature of 100°C for 12 hours. Dried to lumps.

[0025] The block obtained after drying was ground into powder with a mortar, and...

Embodiment 2

[0028] Add copper nitrate to ethylene glycol while stirring, heat the mixed solution of copper nitrate and ethylene glycol to 130°C to completely dissolve copper nitrate in ethylene glycol to form a light blue solution, and the mass percentage of copper nitrate to the solution is 2.5 %. Slowly drop ammonia water with a mass ratio of ammonia to copper nitrate of 3:1 into the light blue solution while stirring to obtain a solution of blue flocculent precipitates.

[0029] Dissolve soluble starch in deionized water to form a starch solution, and prepare a soluble starch solution with a solute mass percentage of 8%. Take 12ml of soluble starch solution and slowly drop it into the mixed solution of blue flocculent precipitate. After the reaction is complete, a viscous liquid is obtained. Put the viscous liquid into an oven at a drying temperature of 80°C for 18 hours. Dry to form lumps.

[0030] The blocky objects obtained after drying were ground into powder with a mortar, and t...

Embodiment 3

[0033] Add copper nitrate to ethylene glycol while stirring, and heat the mixed solution of copper nitrate and ethylene glycol to 130°C. Copper nitrate is completely dissolved in ethylene glycol to form a light blue solution. The mass percentage of copper nitrate in the solution is 2%. . Slowly drop ammonia water with a mass ratio of ammonia to copper nitrate of 3:1 into the light blue solution while stirring to obtain a mixed solution of blue flocculent precipitates.

[0034] Dissolve soluble starch in deionized water to form a starch solution, and prepare a soluble starch solution with a solute mass percentage of 8%. Take 14ml of soluble starch solution and slowly drop it into the mixed solution of blue flocculent precipitate. After the reaction is complete, a viscous liquid is obtained. Put the viscous liquid in an oven at a drying temperature of 80°C for 20 hours. Dry to form lumps.

[0035] The blocky object obtained after drying was ground into powder with a mortar, an...

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Abstract

The invention discloses a preparation method of carbon-coated copper nanoparticles with core-shell structures. The method comprises the following steps: adding cupric nitrate into ethylene glycol for heating and dissolving; adding ammonia water to form liquid containing blue floccules; adding soluble starch aqueous solution, constantly mixing to form thick liquid; drying and milling into powder; putting the powder into a tubular furnace; introducing protective gas; heating for pyrolysis for a certain time; and taking out black powder samples after the furnace body is cooled, wherein the black powder samples are carbon-coated copper nanoparticles. The method has the advantages that the preparation method is simple, the needed equipment or device is free from being specially designed or manufactured, and the manufacture cost is low, and the preparation steps are simple and are easily implemented. The carbon-coated copper nanoparticles with the core-shell structures, prepared by the preparation method, have the characteristic of capability of remarkably improving the heat conductivity of organisms.

Description

technical field [0001] The invention belongs to the technical field of nanoparticle preparation methods, and relates to a preparation method of carbon-coated copper nanoparticles with a core-shell structure. Background technique [0002] Carbon-coated copper nanoparticles are nanoparticles with a core-shell structure, the interior is a metallic copper core, and the exterior is surrounded by layers of amorphous carbon. The coating of the carbon layer makes the inner copper core exhibit unique nanometer properties. Due to energy level splitting, the electrons and phonons of nanometer-sized copper particles are expressed in quantum form in the thermal transport properties. The relaxation time of its electrons and phonons is much longer than that of the macroscopic bulk. Therefore, the thermal conductivity of nano-copper particles is greater than that of macroscopic bulk copper. The inner copper core has high thermal conductivity, while the outer multilayer carbon film has goo...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 陈进
Owner XIAN UNIV OF SCI & TECH
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