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Preparation method of carbon-coated cobalt metal nano-particles

A nanoparticle, cobalt metal technology, applied in nanotechnology, metal material coating process, gaseous chemical plating, etc., can solve the problems of poor performance, difficult removal, and low yield of carbon-coated metal nanoparticles, and achieve easy Accurate control, good crystallinity and high yield

Inactive Publication Date: 2014-04-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method for carbon-coated cobalt metal nanoparticles, which is a method for decomposing acetylene on a potassium chloride carrier to synthesize carbon-coated cobalt metal nanoparticles by chemical vapor deposition, which overcomes the The carbon-coated metal nanoparticles synthesized in the prior art have low purity, many impurities and are not easy to remove, and the defects of poor performance and low yield of carbon-coated metal nanoparticles

Method used

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  • Preparation method of carbon-coated cobalt metal nano-particles
  • Preparation method of carbon-coated cobalt metal nano-particles
  • Preparation method of carbon-coated cobalt metal nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The first step, the preparation of cobalt-potassium chloride catalyst

[0043] A total weight of 10g of cobalt carbonate and potassium chloride mixture is added to 200ml deionized water to ensure that the molar mass ratio of cobalt in cobalt carbonate and potassium chloride is 0.01:1, then stir with a magnetic stirrer, and the rotating speed is 400r / min until stirring to form a suspension, place the beaker containing the suspension in an ultrasonic disperser, disperse with 30kHz ultrasonic waves for 30 minutes, and then let it stand for 24 hours, then place the beaker containing the suspension in an electric heating constant temperature In a drying oven, dry at 120°C for 3 hours until the water is completely evaporated, put the dried mixture in a ball mill jar, use a planetary ball mill at a speed of 900r / min for 1 hour, and put the ball milled mixture in a quartz ark , place the quartz ark in the constant temperature zone of the horizontal tube furnace, and the tube f...

Embodiment 2

[0053] The first step, the preparation of cobalt-potassium chloride catalyst

[0054] A total weight of 12g of cobalt carbonate and potassium chloride mixture is added to 200ml deionized water to ensure that the molar mass ratio of cobalt in cobalt carbonate and potassium chloride is 0.05:1, then stir with a magnetic stirrer, and the rotating speed is 500r / min until stirring to form a suspension, place the beaker containing the suspension in an ultrasonic disperser, disperse with 35kHz ultrasonic waves for 30 minutes, and then let it stand for 24 hours, then place the beaker containing the suspension in an electric heating constant temperature In a drying oven, dry at 135°C for 4 hours until the water is completely evaporated, put the dried mixture in a ball mill jar, use a planetary ball mill at a speed of 1100r / min for 3 hours, and place the ball milled mixture in a quartz ark , place the quartz ark in the constant temperature zone of the horizontal tube furnace, and the tu...

Embodiment 3

[0060] The first step, the preparation of cobalt-potassium chloride catalyst

[0061] A total weight of 15g of cobalt carbonate and potassium chloride mixture is added to 200ml deionized water to ensure that the molar mass ratio of cobalt in cobalt carbonate and potassium chloride is 0.09:1, then stir with a magnetic stirrer, and the rotating speed is 600r / min until stirring to form a suspension, place the beaker containing the suspension in an ultrasonic disperser, disperse with 40kHz ultrasonic waves for 30 minutes, and then let it stand for 24 hours, then place the beaker containing the suspension in an electric heating constant temperature In a drying oven, dry at 150°C for 6 hours until the water evaporates completely, place the dried mixture in a ball mill jar, use a planetary ball mill to mill at a speed of 1300r / min for 5 hours, and place the milled mixture in a quartz ark , place the quartz ark in the constant temperature zone of the horizontal tube furnace, and the ...

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Abstract

The invention discloses a preparation method of carbon-coated cobalt metal nano-particles, which relates to a gaseous compound decomposition-based chemical plating by which reaction product of surface material is not preserved in a plating layer and only carbon is deposited, and is a method for decomposing ethyne and synthesizing carbon-coated cobalt metal nano-particles on potassium chloride carrier by means of chemical vapor deposition. The preparation method comprises the following steps: firstly, preparing cobalt-potassium chloride catalyst, then, synthesizing carbon-coated cobalt metal nano-particles, and finally, performing purification to obtain the carbon-coated cobalt metal nano-particles with purity of 95-99%. The preparation method overcomes the defects that the carbon-coated metal nano-particles synthesized by the existing technology have low purity, poor performance and low yield, and contains overmuch impurities, and the impurities are not easy to remove.

Description

technical field [0001] The technical solution of the present invention relates to the electroless plating that only deposits carbon through the decomposition of gaseous compounds and the reaction products of surface materials do not remain in the plating layer, specifically the preparation method of carbon-coated cobalt metal nanoparticles. Background technique [0002] Since 1993, Rouff et al. first discovered carbon-coated lanthanum metal nanoparticles (LaC 60 ) Since then, carbon-coated metal nanoparticles have attracted the research interests of researchers around the world due to their unique morphological structure and characteristics. Researchers have discovered that carbon-coated metal nanoparticles have potential applications in electricity, magnetism, light, catalysts, and medicine, and have launched a series of preparation process research. [0003] Carbon-coated cobalt metal nanoparticles are an onion-like structure formed by the orderly arrangement of single-la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/26B22F1/02B82Y40/00
Inventor 李海鹏耿晓欣张娜李宝娥范佳薇
Owner HEBEI UNIV OF TECH
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