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Impact reaction preparation device and preparation method of graphene

A technology for preparing device and graphene, applied in graphene, nano-carbon and other directions, can solve the problems of low carbon fixation efficiency, hinder large-scale application, low graphene yield, etc., to improve carbon fixation efficiency, fast reaction, improve The effect of conversion rate

Active Publication Date: 2021-05-28
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the fact that solid carbon dioxide is volatile at room temperature, the graphene yield of this method is low, that is, the carbon fixation efficiency is low, which hinders the large-scale application of this method.

Method used

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  • Impact reaction preparation device and preparation method of graphene
  • Impact reaction preparation device and preparation method of graphene
  • Impact reaction preparation device and preparation method of graphene

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Experimental program
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preparation example Construction

[0046] The impact reaction preparation method of graphene comprises the following steps:

[0047] S1. Uniformly mix carbon source, reducing agent and doping element additives at low temperature to make an impact mixture, place the impact mixture in the sample space 5 of the sample box, and continuously inject coolant to keep the impact mixture at a low temperature ; Reducing agents include but not limited to magnesium, calcium hydride, hydrazine hydrate; doping element additives include but not limited to urea, thiourea, ammonium nitrate.

[0048] S2. Drive the flyer 7 to collide with the sample box at a high speed through an impact loading method to obtain powder A, and recover the powder A; the impact loading method includes but not limited to chemical explosion and gas cannon.

[0049] S3. After the powder A is pickled and purified, the suspension B is obtained by suction filtration through a suction filtration device. The schematic diagram of the suction filtration device ...

Embodiment 1

[0053] The impact reaction preparation method of graphene comprises the following steps:

[0054] S1. Uniformly mix dry ice and calcium hydride at low temperature to make an impact mixture, place the impact mixture in the sample space 5 of the sample box, and continuously inject cooling material to keep the impact mixture at a low temperature, the dry ice and calcium hydride Mass ratio 5:1;

[0055] S2. Place a 100mm high TNT powder column on the flyer 7, drive the flyer 7 to hit the sample box at a high speed through a chemical explosion to obtain powder A, and recover powder A;

[0056] S3, after the powder A is pickled and purified, the suspension B is obtained by suction filtration through a suction filtration device;

[0057] S4. Dry the suspension B at 40-45° C. to obtain powder C, which is the graphene powder.

[0058] Preparation method embodiment 2:

[0059] S1. Mix dry ice, calcium hydride and thiourea powder evenly at low temperature to make an impact mixture, pl...

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Abstract

The invention discloses an impact reaction preparation device and preparation method of graphene, and relates to the field of graphene preparation. The device comprises a sample box and a cooling member. The method comprises the following steps: S1, preparing an impact mixture, placing the impact mixture in a sample space of a sample box, and keeping a low-temperature state; S2, driving a flyer to impact the sample box at a high speed to obtain powder A; S3, performing acid pickling purification on the powder A, and performing suction filtration to obtain turbid liquid B; and S4, drying the turbid liquid B to obtain graphene powder. Through a cooling liquid diversion design, the whole device including the impact mixture is kept in a low-temperature state for a long time, volatilization of solid carbon sources such as dry ice is effectively controlled, the graphene conversion rate of the dry ice is improved, the carbon sequestration efficiency of the method is enhanced, the output is greatly improved, and the application prospect of the method for synthesizing graphene through explosion is improved; the method has the advantages of low production requirement, simple process control, high repeatability, no need of complex process control, and fast reaction; and according to the method, only corresponding doping source powder needs to be added into a reaction precursor.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a graphene shock reaction preparation device and preparation method. Background technique [0002] Graphene is a new type of carbon nanomaterial that is tightly packed into a two-dimensional honeycomb lattice structure by a single layer of carbon atoms. The discovery of graphene declared a truly independent two-dimensional material and opened up a new field of material science. [0003] The light absorption rate of graphene is only 2.3%; the thermal conductivity is as high as 5300W / m K, which is higher than that of carbon nanotubes and diamonds. The material with the lowest resistivity. The high mechanical strength of graphene enables it to be used in the manufacture of micro-electromechanical and nano-electromechanical systems. It also has unparalleled advantages in the macroscopic field in ultra-light body armor, ultra-thin and ultra-light aircraft materials, etc. In addi...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01B32/184
Inventor 尹昊谭路遥蒋家勇
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS