Method of preparing porous carbon and porous carbon

A technology of porous carbon and carbon source, which is applied in the preparation/purification of carbon, etc., can solve the problem of low specific surface area and porosity of porous carbon, and achieve the effect of high specific surface area and improving activation efficiency.

Active Publication Date: 2017-05-31
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for preparing porous carbon and

Method used

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  • Method of preparing porous carbon and porous carbon
  • Method of preparing porous carbon and porous carbon
  • Method of preparing porous carbon and porous carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Synthesize 2g polydopamine, mix homogeneously with KOH saturated solution in the ratio of mass ratio 1:5, at 120 o After C is fully dried, it is transferred to a nickel boat; the nickel boat containing the mixed sample is transferred to a tubular carbonization furnace, and is heated at 5 o C / min rate heating up to 200 o C and then keep warm for 3h, then continue to heat up to the carbonization temperature of 600 oC Keep warm for 3h. After the temperature dropped to room temperature, the sample was taken out and ultrasonically cleaned with excess 2M HCl for 1 h; then washed three times with deionized water and ethanol until the filtrate was neutral, and the prepared porous carbon was obtained after sufficient drying.

Embodiment 2~4

[0030] In addition to changing the carbonization temperature to 700 oC , 800 oC and 900 oC Except, other experimental processes and conditions thereof are the same as in Example 1.

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Abstract

The invention discloses a method of preparing porous carbon and porous carbon. The method comprises the following steps: uniformly mixing a carbon source and an activator; drying the mixture; and carbonizing the mixture in an inert atmosphere to obtain porous carbon, wherein the carbon source contains one or more elements of N, P, B and S. By taking some materials containing elements such as N, P, B and C as the carbon source, the carbon source is activated through an activator to obtain porous carbon with a high specific surface area. As a C-N bond, a C-P bond, a C-B bond and a C-S bond are weaker than a C-C bond in bond energy, the activator will preferably etch impure elements such as N, P, B and S and surrounding carbon thereof so as to form uniform holes, so that the etching efficiency is improved and the specific surface area is improved.

Description

technical field [0001] The invention relates to the field of porous carbon preparation, in particular to a method for preparing porous carbon and porous carbon. Background technique [0002] Chemical etching is a commonly used method for preparing porous carbon materials, generally using KOH, H 3 PO 4 , ZnCl 2 , CO 2 , water vapor, etc. as an activator, activated at high temperature to prepare porous carbon materials. Compared with the template method, the production cost is lower, the production cycle is shorter, and it is easier to realize industrialization. The chemical etching method is based on the reaction between the activator and carbon at high temperature to consume part of the carbon element to form holes, and the generated gases (carbon dioxide, carbon monoxide, methane, etc.) escape from the surface of the carbon material to further form holes. The problem is that the choice of carbon source is an important factor affecting the activation efficiency. At pres...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01P2006/12C01P2006/14C01P2006/16C01P2006/17
Inventor 朱才镇韩沛海洋邱昭政杨波徐坚
Owner SHENZHEN UNIV
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