Liquid benzene medium arc discharge process of preparing onion-shaped fullerene

Abstract

The present invention is liquid benzene medium arc discharge process of preparing onion-shaped fullerene. Through arc discharge with liquid benzene as material and discharge medium, ferrocene as catalyst, deionized water as coolant, air as isolator and graphite rod as electrodes, inside arc discharge trough, and at DC voltage of 22V-25 V, current of 50 A and power of 800-1200 W, suspension solution is prepared; and through further filtering in a filtering machine, purification in a tubular high temperature furnace, grinding, sieving and vacuum drying, nanometer level onion-shaped fullerene is obtained at yield of 70 %. The nanometer level onion-shaped fullerene has regular layered molecule arrangement, powder size of 10-30 nm, stable chemical and physical properties and high graphitization degree, and may be used in many industrial fields.

Description

technical field [0001] The invention relates to a method for preparing onion-like fullerenes by using liquid benzene medium arc discharge, and belongs to the technical field of synthesis methods of carbon nanomaterials. Background technique [0002] The carbon atom number is 6, which belongs to the fourth main group of the periodic table of elements. It can form allotropes with different structures and properties through different bonding methods. Diamond, graphite and amorphous carbon are three well-known Allotropes of carbon that exist in the form of simple substances, among which graphite has a layered structure, diamond has a tetrahedral structure, and amorphous carbon is composed of molecular fragments of graphite layered structure, and carbon is occasionally bonded to each other by tetrahedral bonding connected disordered structure. [0003] Fullerene is the fourth allotrope of carbon other than diamond, graphite and amorphous carbon. Fullerene is a general term for c...

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Problems solved by technology

[0005] At present, the methods for preparing nano-onion-like fullerenes include: DC arc discharge method, electron beam irradiation method, plasma-assisted method, chemical vapor deposition method, mechanical ball milling method, carbon ion beam implantation method, underwater arc discharge method, etc. , in these methods, nano-onion-like fullerenes appear in the form of by-products, and the preparation equipment is complicated, and later developed into an arc discharge method using liquids such as water and liquid nitrogen as the medium. Although the equipment is simple, the final product The production rate is affected by the volatilization rate of the graphite electrode, the yield is low, and the preparation method has complicated process procedures, difficult to control, uneven product, serious environmental pollution, low product purity, low yield, and high cost. not ideal

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