Preparation process of nano carbon crystals

A nano-carbon crystal and preparation technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of purifying clean carbon nanotubes, complex preparation process, increasing graphite layer spacing, etc. problem, to achieve the effect of regular and controllable shape, simple process and prolonging the lifetime of holes

Active Publication Date: 2016-01-27
ZHENGZHOU SINO CRYSTAL DIAMOND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The industrial preparation method of fullerene is mainly the combustion method, which mainly uses benzene and toluene to obtain C through incomplete combustion under the action of oxygen. 60 with C 70 At the same time, a large amount of toxic gas is discharged to pollute the environment, and subsequent purification with other organic substances is required, and the preparation process is complicated
The industrial preparation method of carbon nanotubes is the arc method. The graphite electrode is placed in a reaction vessel filled with nitrogen or argon, and an arc is emitted between the two electrodes. Under this condition, C 60 , amorphous C, and multi-layered carbon nanotubes, the subsequent purification process cannot remove C 60 Purify cleanly to obtain carbon nanotubes with high purity, and this preparation method consumes a lot of energy
The preparation method of graphene is mainly oxidation-reduction method. Graphene is oxidized by oxidant to increase the layer spacing of graphite, then separated by physical method, and finally reduced by chemical method to obtain graphene. The yield of graphene obtained by this method is High, but low product quality

Method used

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  • Preparation process of nano carbon crystals
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  • Preparation process of nano carbon crystals

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation process of nano-carbon crystals, the process flow diagram is as follows figure 1 As shown, the steps are:

[0030] (1) Preliminary crushing: firstly, the diamond raw material is sent into the crushing cavity of the mechanical crusher, and is crushed by the high-speed rotating hammer head inside the crusher. The material stays in the crusher for re-crushing, and the granular material filtered through the finest sieve in the lower layer of the crusher is collected by the sieve plate (the mesh number of the sieve is not less than 32 mesh), while the material filtered by other mesh sieves can be used as Coarse materials are sold or used to prepare materials with other particle sizes; particles above 32 mesh are used for primary particle size separation by a multi-layer vibrating sieve machine. The vibrating sieve time is generally controlled at 30min~3h, and the mesh number of the sieve is sequentially arranged from 40 mesh to 500 mesh. Cloth, the coarse mate...

Embodiment 2

[0036] The difference between the preparation process of Example 2 and Example 1 is that the centrifugation time is 30 minutes, the rotation speed is 20000 rpm, and the precipitation and separation time is 4 days.

[0037] The particle size of the prepared nano-carbon crystals is 6-8nm.

Embodiment 3

[0039] The difference between the preparation process of Example 3 and Example 1 is that the centrifugation time is 1 h, the rotation speed is 10000 rpm, and the precipitation and separation time is 6 days.

[0040] The particle size of the prepared nano-carbon crystals is 4-6nm.

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Abstract

The invention provides a preparation process of nano carbon crystals and belongs to the field of carbon material preparation. The preparation process includes the following steps of acid washing, wherein diamond raw materials are crushed into fine powder being over 10000 meshes in particle size, and after the fine powder is subjected to acid washing and extraction, the fine powder is washed with deionized water till the pH of cleaning fluid is close to 7; screening, wherein the cleaned materials are subjected to centrifugal separation, supernatant liquid is picked for precipitation separation for 4-7 days, the supernatant liquor is removed, and a finished product of the nano carbon crystals is obtained after lower sediment is dried. The preparation process is low in lost, simple in equipment, simple in operation and high in safety of operating staff, simple in separation and extraction process and little in pollution to the environment.

Description

technical field [0001] The invention belongs to the field of carbon material preparation, and in particular relates to a preparation process of nano carbon crystals. Background technique [0002] Carbon is an element with the widest content in the world. Carbon materials are currently the most widely used materials in the world. With the changes of the times and the progress of science, people continue to use carbon and discover carbon, and invent many carbon materials. Materials, such as fullerenes, carbon nanotubes, graphene, etc., nanocarbon crystals are a new member of the carbon material family. The emergence of new materials means the improvement of material preparation process. The industrial preparation method of fullerene is mainly the combustion method, which mainly uses benzene and toluene to obtain C through incomplete combustion under the action of oxygen. 60 with C 70 At the same time, a large amount of toxic gas is discharged to pollute the environment, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00
Inventor 郭留希赵清国张洪涛武艳强刘永奇王俊芝薛胜辉何本锋刘君丽杨晋中张建华
Owner ZHENGZHOU SINO CRYSTAL DIAMOND
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