Method and device for preparing carbon-coated copper nanoparticles by wire electric explosion method

Abstract

The invention discloses a method and a device for preparing carbon-coated copper nanoparticles by using a metal wire electric explosion method. A copper wire with a certain length and diameter is evenly wound on a carbon rod, and the metal wire is passed through in an argon atmosphere. High voltage and high current make the wire explode electrically, and the carbon-coated copper nanoparticles can be collected. The copper wire undergoes phase transformation during heating during the electric explosion, and undergoes melting, gasification, plasma and other processes successively, and produces copper atoms under the high temperature heating of the plasma, and a part of carbon atoms will also be formed after the carbon rod is passed through a high current. , and then the two spontaneously and uniformly nucleate and condense into atomic clusters from the gas phase, forming an initial small droplet, which grows continuously, and then forms a carbon coating layer through two mechanisms of internal carbon atom precipitation and external carbon atom deposition, and finally passes through Cooling forms carbon-coated copper nanoparticles. This method proposes a new method for preparing carbon-coated copper nanoparticles, which has great application value for industrial production and scientific research.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparation of carbon-coated copper nanoparticles, and relates to a method and a device for preparing carbon-coated copper nanoparticles by using a wire electric explosion method. 【Background technique】 [0002] Metal nanoparticles have many advantages. However, due to their high energy content, they can easily react with gases and liquids in the environment or form clusters, which loses the advantages of nanoparticles. Therefore, after the carbon coating is introduced, the multi-layer graphite will be tightly coated on the periphery of the nano-metal particles, and the nano-metal is at the core position, that is, a new type of nano-carbon / metal composite material is formed through this shell / core structure, which can protect the metal nanoparticles. In addition to the original characteristics, endowed with unique electrical, optical, and magnetic properties, it has great application value in high-densi...

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Problems solved by technology

Most of these methods require complex production equipment, require high energy, and the products have many impurities or are dangerous, so they are greatly limited in practical application.

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