Method for preparing onion-like fullerene by nano-particle catalyzed electric-arc process

An onion-shaped fullerene and nano-catalysis technology, which is applied in circuits, electrical components, corona discharge devices, etc., can solve the problems of low yield and difficulty of onion-shaped fullerenes, achieve a high degree of graphitization, and improve production. rate, the effect of a wide range of applications

Inactive Publication Date: 2005-06-22
TAIYUAN UNIV OF TECH
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  • Description
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AI Technical Summary

Problems solved by technology

However, it is difficult to obtain onion-like fullerenes by these methods, and the main problem is that the yield is low.

Method used

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  • Method for preparing onion-like fullerene by nano-particle catalyzed electric-arc process
  • Method for preparing onion-like fullerene by nano-particle catalyzed electric-arc process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A hole of Φ6×120mm is drilled in the middle of a Φ8mm spectrally pure graphite rod as a discharge anode. After uniformly mixing Cu particles and coal powder 100 mesh at a ratio of 1:20 (molar ratio), fill them into the anode hole and fully compact them. The catalyst end of the anode is sharpened and secured to the anode holder. Put the cathode and anode into the discharge chamber, start the vacuum system to evacuate, so that the vacuum degree of the discharge chamber reaches about 3Pa. Close the vacuum pipeline valve, fill the vacuum chamber with Ar gas at a pressure of 0.065 MPa through the inflation valve, and close the vacuum system. Pass the cooling water, turn on the discharge power supply, and adjust the current to 140A. Carefully turn the screw in to make the graphite rod of the anode slowly approach the cathode, and start the arc, and continue to adjust the distance between the cathode and the anode to be about 1mm to 4mm to stabilize the arc. After dischargin...

Embodiment 2

[0028] A hole of Φ6×120mm is drilled in the middle of a Φ8mm spectroscopically pure graphite rod as a discharge anode, and Bi with a diameter of about 30nm to 40nm 2 o 3 After the particles and nanometer pure graphite powder are evenly mixed in the ratio of 1:20 (molar ratio), they are filled into the anode hole and fully compacted, and the end of the anode with the catalyst is sharpened, and then fixed on the anode chuck. Put the cathode and anode into the discharge chamber, start the vacuum system to evacuate, so that the vacuum degree of the discharge chamber reaches about 3Pa. Close the vacuum pipeline valve, fill the vacuum chamber with Ar gas at a pressure of 0.065 MPa through the inflation valve, and close the vacuum system. Pass the cooling water, turn on the discharge power supply, and adjust the current to 120A. Carefully turn the screw in to make the graphite rod of the anode slowly approach the cathode, and start the arc. Continue to adjust the distance between t...

Embodiment 3

[0030] According to embodiment 1,2 method, pulverized coal and Al 2 o 3 Add it into the anode mesopore at a ratio of 1:30, and carry out the same method steps.

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Abstract

The invention discloses a method for preparing onion-like fullerenes by a nanoparticle catalytic arc method. The method utilizes a direct current arc discharge method, uses spectrum graphite as a cathode, and spectrum graphite with a mixture in the middle hole as an anode. Under the condition of electric current, the anode graphite will gasify together with the mixture, nucleate and transform into onion-like fullerene, and under the protection of carrier gas, onion-like fullerene will be synthesized by arc discharge method. The process of the invention is stable, simple and fast, and the onion-like fullerene produced has a high degree of graphitization and low cost, and at the same time has important properties such as good bonding characteristics, electrical conductivity, and quantum mechanical effects, and becomes a new type of multi-functional compound that can meet special performance requirements. Functional materials have a wide range of applications and attractive application prospects.

Description

technical field [0001] The invention relates to a preparation method of onion-like fullerene. In particular, it is a method for preparing onion-like fullerenes by nanoparticle catalytic arc method. technical background [0002] Following C 60 Since the discovery of carbon nanotubes, their special physical and chemical properties have attracted extensive research. Onion-like fullerene, as a new type of carbon nano-functional material, has attracted more and more attention because of its special onion-like structure, which makes it have many excellent properties different from existing functional materials. However, the current methods such as ion beam irradiation can only obtain onion-like fullerene in a small amount, which is not conducive to the study of its physical and chemical properties. The "method for preparing fullerenes" of CN1131408A is to pyrolyze one or more aromatic hydrocarbons optionally substituted; , cobalt, nickel transition metal catalysts and strong c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/08C01B31/02H01T19/00
Inventor 许并社王晓敏刘旭光贾虎生
Owner TAIYUAN UNIV OF TECH
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