Method for enhancing structural order of carbide derived carbon

A technology of carbide-derived carbon with an ordered structure, applied in the preparation/purification of carbon, etc., can solve the problems of high requirements for reaction equipment, unsatisfactory CDC structure order, etc., to achieve improved order and simple reaction equipment , The effect of simple process

Inactive Publication Date: 2012-07-18
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method has disadvantages such as unsatisfactory structural order of the obtained CDC or excessive requirements on reaction equipment (or conditions).

Method used

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  • Method for enhancing structural order of carbide derived carbon
  • Method for enhancing structural order of carbide derived carbon
  • Method for enhancing structural order of carbide derived carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 20g of titanium carbide powder with a particle size of 800 mesh and put it into a high-energy ball mill, put 80g of GCr15 bearing steel balls, and then put 1ml of ethanol as a dispersant. The speed of the ball mill is 220 rpm, and the ball milling time is 5 hours. At this time, the particle size of the titanium carbide powder was about 2.0 μm. Then put the above-mentioned titanium carbide powder into a fused silica tube furnace, vacuumize to 0.1 Pa, and then pass in argon gas. The temperature of the tube furnace was raised to 600° C., and chlorine gas was introduced at a flow rate of 20 ml / min for 2 hours. After the reaction, argon gas is introduced to remove residual chloride on the surface of the titanium carbide powder. After the temperature is cooled to room temperature, carbide-derived carbon is obtained.

[0017] Such as figure 1 and figure 2 As shown, in the case of the same process and parameters of the high-temperature halogenation treatment, the orde...

Embodiment 2

[0019] Take 20g of titanium carbide powder with a particle size of 800 mesh and put it into a high-energy ball mill, put in 120g of GCr15 bearing steel balls, and then put in 1ml of ethanol as a dispersant. The speed of the ball mill is 180 rpm, and the ball milling time is 10 hours. At this time, the particle size of the titanium carbide powder was about 0.8 μm. Then put the above-mentioned titanium carbide powder into a fused silica tube furnace, vacuumize to 0.05Pa, and then pass in argon gas. The temperature of the tube furnace was raised to 800° C., and chlorine gas was introduced at a flow rate of 30 ml / min for 1 hour. After the reaction, argon gas is introduced to remove residual chloride on the surface of the titanium carbide powder. After the temperature drops to room temperature, carbide-derived carbon can be obtained.

[0020] Such as image 3 and Figure 4 As shown, in the case of the same process and parameters of the high-temperature halogenation treatment, ...

Embodiment 3

[0022] Take 20g of titanium carbide powder with a particle size of 800 mesh and put it into a high-energy ball mill, put 100g of GCr15 bearing steel balls, and then put 1ml of ethanol as a dispersant. The speed of the ball mill is 200 rpm, and the ball milling time is 8 hours. At this time, the particle size of the titanium carbide powder was about 1.2 μm. Then put the above-mentioned titanium carbide powder into a fused silica tube furnace, evacuate to 1 Pa, and then pass in argon gas. The temperature of the tube furnace was raised to 700° C., and chlorine gas was introduced at a flow rate of 25 ml / min for 1.5 hours. After the reaction, argon gas is introduced to remove residual chloride on the surface of the titanium carbide powder. After the temperature drops to room temperature, carbide-derived carbon can be obtained.

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Abstract

The invention discloses a method for enhancing the structural order of carbide derived carbon. The method comprises the following steps of: putting titanium carbide powder into a high-energy ball mill in the ball-material ratio of 4:1-6:1 at the rotating speed of 180-220 revolutions per minute for 5-10 hours, and smashing and refining the particle size of the titanium carbide powder to 0.8-2.0 mum; and putting the ball-milled titanium carbide powder into a melting quartz tubular furnace, vacuumizing to 0.05-1Pa, introducing argon gas, heating the tubular furnace to 600-800 DEG C, introducing chlorine gas at the low speed of 20-30 ml/min for 1-2 hours, introducing argon gas once again after a reaction, removing chlorides such as titanium tetrachloride and the like left on the surface of the titanium carbide powder under the erosion action of argon gas flow, and cooling to the room temperature to obtain the carbide derived carbon with high structural order. The method has the advantages of simple and convenient process, simple reaction equipment and capability of remarkably enhancing the order of a carbide derived carbon structure.

Description

technical field [0001] The invention belongs to the field of novel carbon materials, and in particular relates to a preparation method of carbon materials. Background technique [0002] Carbide-derived carbon (CDC) is a new type of porous carbon material. It is formed by taking away non-carbon atoms in carbides in the form of gas halides under high temperature conditions. In recent years, CDC has attracted extensive attention from researchers at home and abroad, not only because of its ultra-high specific surface area and the controllability of the resulting pore size, but also because it can synthesize almost all carbon structures, such as carbon nanotubes. , onion carbon, nano-diamond, etc. Based on these characteristics, CDC has potential huge applications in many fields, such as hydrogen storage, catalyst carrier, molecular sieve, supercapacitor, etc. [0003] It is well known that the properties of materials are closely related to their structures. For CDCs, the str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 张瑞军徐江周海朝王建新陈鹏
Owner YANSHAN UNIV
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