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Method and device for preparing carbon-coated metal nanoparticles through electric arc in liquid nitrogen

A technology of metal nanoparticles and carbon coating, applied in the direction of nano-carbon, nanotechnology, nanotechnology, etc., can solve the problems of high requirements for preparation equipment, complicated operation, low yield, etc., to avoid continuous expansion, simple operation, and save Go to high cost effect

Active Publication Date: 2022-01-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides a method and device for preparing carbon-coated metal nanoparticles by electric arc in liquid nitrogen, which solves the problem of complicated operation for preparing carbon-coated metal nanomaterials, high requirements for preparation equipment, and high cost. The problem of high and low yield

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  • Method and device for preparing carbon-coated metal nanoparticles through electric arc in liquid nitrogen
  • Method and device for preparing carbon-coated metal nanoparticles through electric arc in liquid nitrogen
  • Method and device for preparing carbon-coated metal nanoparticles through electric arc in liquid nitrogen

Examples

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Effect test

Embodiment 1

[0056] Step 1. Clean the graphite rod 6 and the metal rod 10 as raw materials, rinse with absolute ethanol to remove oil and impurities on the electrode surface, and then rinse the absolute ethanol with deionized water. The graphite rod 6 is a high-purity graphite rod with a diameter of 6mm and a purity of 99.9%. The metal rod 10 is an aluminum rod with a purity of 99.7% and a diameter of 12 mm. Before cleaning, the oxide layer on the surface of the aluminum rod is polished and removed with sandpaper.

[0057] Step 2: Clamp the aluminum rod on the lower conductive clip 9 as an anode; clamp the graphite rod 6 on the upper conductive clip 3 as a cathode.

[0058] Step 3, the gas introduced into the liquid nitrogen through the quartz tube 5 is argon; the cathode and anode and the quartz tube 5 are placed in a beaker filled with liquid nitrogen 7 to ensure that the contact position of the cathode and anode is below the liquid nitrogen surface .

[0059] Step 4: Set the current o...

Embodiment 2

[0063] Step 1. Clean the graphite rod 6 and the metal rod 10 as raw materials, rinse with absolute ethanol to remove oil and impurities on the electrode surface, and then rinse the absolute ethanol with deionized water. The graphite rod 6 is a high-purity graphite rod with a diameter of 6mm and a purity of 99.9%. The metal rod 10 is a copper rod with a purity of 99.7% and a diameter of 12 mm. Before cleaning, the oxide layer on the surface of the copper rod is polished and removed with sandpaper.

[0064] Step 2: Clamp the copper rod on the lower conductive clip 9 as an anode; clamp the graphite rod 6 on the upper conductive clip 3 as a cathode.

[0065] Step 3, the gas introduced into the liquid nitrogen 7 through the quartz tube 5 is helium; the cathode and anode and the quartz tube 5 are placed in a beaker filled with liquid nitrogen 7 to ensure that the contact position of the cathode and anode is at the liquid nitrogen level under.

[0066] Step 4: Set the current of th...

Embodiment 3

[0069] Step 1. Clean the graphite rod 6 and the metal rod 10 as raw materials, rinse with absolute ethanol to remove oil and impurities on the electrode surface, and then rinse the absolute ethanol with deionized water. The graphite rod 6 is a high-purity graphite rod with a diameter of 6mm and a purity of 99.9%. The metal rod 10 is an iron rod with a purity of 99.7% and a diameter of 12mm. Before cleaning, the surface of the iron rod is polished clean with sandpaper.

[0070] Step 2: Clamp the iron rod on the lower conductive clip 9 as an anode; clamp the graphite rod 6 on the upper conductive clip 3 as a cathode.

[0071] Step 3, the gas introduced into the liquid nitrogen 7 through the quartz tube 5 is carbon dioxide; the cathode and anode and the quartz tube 5 are placed in a beaker filled with liquid nitrogen 7 to ensure that the contact position of the cathode and anode is above the liquid nitrogen surface Down.

[0072] Step 4: Set the current of the DC power supply 1...

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Abstract

The invention discloses a method and device for preparing carbon-coated metal nanoparticles in liquid nitrogen through an electric arc. The method comprises the following steps that the end surface of one end of a metal rod makes contact with the end surface of one end of a graphite rod and is immersed in liquid nitrogen; the metal rod is connected to one electrode of a direct-current power supply, and the graphite rod is connected to the other electrode of the direct-current power supply; the graphite rod and the metal rod are separated to an experiment spacing distance, an electric arc is generated between the graphite rod and the metal rod, the electric arc is maintained in the liquid nitrogen or in a gas atmosphere introduced into the liquid nitrogen until the time required by the experiment is reached so as to obtain the liquid nitrogen containing the carbon-coated metal nanoparticles, wherein the end surface of one end of the graphite rod and the end surface of one end of the metal rod are always located below the liquid level of the liquid nitrogen; and a collecting agent is added into the liquid nitrogen containing the carbon-coated metal nanoparticles, and after the liquid nitrogen is completely volatilized, the collecting agent is dried to obtain the carbon-coated metal nanoparticles. The method is simpler to operate, high in production efficiency and lower in cost.

Description

technical field [0001] The invention belongs to the field of nanomaterial manufacturing, and specifically provides a method and a device for preparing carbon-coated metal nanoparticles by electric arc in liquid nitrogen. Background technique [0002] In recent years, carbon-coated metal nanoparticles, as a nanomaterial with a core-shell structure, have attracted extensive attention from researchers, and they have great application prospects in functional magnetic materials, biomedicine, wave-absorbing materials, quantum devices, and fuel cells. . [0003] In the field of magnetic recording media, the magnetic recording density of magnetic recording media has also been greatly improved with the improvement of the particle size of magnetic particles from micron to nano-scale. In the field of biomedicine, carbon-coated metal nanoparticles have good compatibility with biological tissues due to their nano-scale particle size. At the same time, carbon coating, as a safe and non-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/16B22F1/054B22F9/14C01B32/05C01B32/15B82Y30/00B82Y40/00
CPCB22F9/14B82Y30/00B82Y40/00C01B32/05C01B32/15Y02E60/50
Inventor 贾申利贾荣照莫永鹏史宗谦
Owner XI AN JIAOTONG UNIV
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