Method and device for producing higher fullerences and nanotubes

A technology of fullerenes and carbon atoms, applied in the field of chemical technology

Inactive Publication Date: 2004-10-06
ROSSETER HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the production of fullerenes and carbon nanotubes with more than 70 carbon atoms is desirable for better technical results (production of larger

Method used

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  • Method and device for producing higher fullerences and nanotubes
  • Method and device for producing higher fullerences and nanotubes
  • Method and device for producing higher fullerences and nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Experiment with the above two methods.

[0047] The equipment is composed as follows: a graphite tube (electrode A) with an outer diameter and an inner diameter of 4 mm and 2 mm respectively, and a length of 50 mm; a spherical graphite contact with a diameter of 12.5 mm; a graphite substrate with a vertical cylindrical channel with a diameter of 13.5 mm (electrode B ). The cylindrical stainless steel housing is filled with liquid (benzene solution based on certain aromatic hydrocarbons like naphthalene, toluene and xylene) up to 50 cm above the contacts. In our tests it was found that such a liquid level provides the maximum time for the arc to function. Pure argon gas is pumped through the graphite tube (electrode A) before and during exposure (removal of oxygen from the device housing and liquid) to create optimal conditions for annealing of carbon clusters to form fullerenes / nanotubes. The arc cross-sectional area is about 3~4mm 2 , the arc current intensity is 10...

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Abstract

A fullerene/nanotubes mixture is produced during a periodical pulsed auto-regulated action of the electric current arc-discharge in the multi-component hydrocarbon medium with limited fullerenes' solubility, besides, the action is continued until the medium dissolves C60. Higher fullerenes absorbed by the ultra-thin graphite particles are separated from C60 dissolved in the liquid medium by sedimentation, whereas the carbon nanotubes are separated from the ultra-thin graphite particles by treating with a boiling concentrated HN03 acid and by low speed centrifuging/acid mixture until the black sediment of the ultra-thin graphite particles is precipitated to the bottom. The periodically pulsed auto-regulated regime of the electric-current arc-discharge is performed by contact breaking an electric circuit due to lifting spherical contactors by gaseous products released during the action and by switching the circuit due to the contacts' going down under action of gravity.

Description

technical field [0001] The present invention relates to chemical processes, in particular to the field of manufacturing fullerenes and carbon nanotubes. Background technique [0002] Fullerenes and carbon nanotubes are the most ideal substances in the basic research of chemistry and physics, as well as the applied research of electronics, nonlinear optics, chemical technology, medicine and other disciplines. [0003] Manufacturing processes for new allotropes of carbon (fullerenes and nanotubes) are based on the generation of cold plasmas of carbon clusters (such as laser ablation of carbonaceous substances, pyrolysis of hydrocarbons, or arc discharge, etc.) Various methods, as well as carbon clusters crystallized under certain conditions to form fullerenes and nanotubes. Then, organic solvents (benzene, toluene, xylene, carbon disulfide, etc.) can be used [1] Fullerenes are eluted from soot. On the other hand, any oxidation process can be used [2...

Claims

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Application Information

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IPC IPC(8): B82B3/00C01B31/02
CPCC01B31/0213C01B31/0246B82Y30/00B82Y40/00C01B32/166C01B32/154C01B32/156
Inventor 弗拉季斯拉夫·安迪维奇·雷日科夫
Owner ROSSETER HLDG
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