Porous carbon material and method for preparing same

A technology of porous carbon materials and polytetraphenylmethane, which is applied in the field of preparation of porous carbon materials and porous carbon materials, can solve the problems of cumbersome preparation process, high cost, and long preparation cycle, and achieve uniform pore size distribution, high specific surface area, and process simple effect

Active Publication Date: 2013-01-30
ZHUHAI PAINTER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods are all physical activation methods, the preparation process is cumbersome, the preparation cycle is long, and the template agent cannot be reused, and the cost is high

Method used

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  • Porous carbon material and method for preparing same
  • Porous carbon material and method for preparing same
  • Porous carbon material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The porous carbon material was prepared according to the following steps.

[0084] Step 1: Synthesis and preparation of a porous organic framework material with ultra-high specific surface area - polytetraphenylmethane:

[0085] (1) Add 1g of nickel bis-1,5-cyclooctadiene, 0.568g of 2,2-bipyridine and 0.4mL of 1,5-cyclooctadiene into 1mL of N,N-dimethylformamide solution, Put it into an oil bath preheated to 60°C to age the catalyst for 0.5-3 hours;

[0086] (2) Subsequently, 3 mL of 0.2M p-bromotetraphenylmethane in N,N-dimethylformamide was reacted at this temperature for 60 hours, and the reaction was stopped;

[0087] (3) Add concentrated hydrochloric acid to the reaction system to destroy excess 1,5-cyclooctadiene nickel, and filter to obtain a white precipitate;

[0088] (4) Wash with hot solutions of 100mL water, 100mL ethanol and 100mL chloroform to remove inorganic salts and soluble organic matter;

[0089] (5) The final product was vacuum dried at 80-200°C ...

Embodiment 2

[0102] The method of this example is basically the same as that of Example 1, except that the active temperature in this example is 600°C.

[0103] Figure 8 It is the 4000 cm of the porous carbon material prepared by the method of this example and its precursor polytetraphenylmethane -1 up to 400 cm -1 Infrared spectrum, where line a is the 4000 cm of the precursor polytetraphenylmethane -1 up to 400 cm -1 Infrared spectrum, line b is 4000 cm of porous carbon material -1 up to 400 cm -1 Infrared spectra. Such as Figure 8 As shown, there are only two weak broad peaks in the infrared spectrum of the porous carbon material prepared by the method of this example, corresponding to the stretching vibration of the carbon-carbon double bond, and no carbon-hydrogen vibration can be observed, indicating that the activation is very thorough.

[0104] Figure 9 It is the thermogravimetric curve of the porous carbon material prepared by the method of this example and the pr...

Embodiment 3

[0110] The method of this example is basically the same as that of Example 1, except that the active temperature in this example is 700°C, and the heating rate of the temperature program in step 3 is 2°C / min.

[0111] Figure 15-18 They are the infrared spectrum, thermogravimetric spectrum, nitrogen adsorption and desorption and pore size distribution diagram of the porous carbon material obtained in this example. Such as Figure 15 As shown, after activation, the hydrocarbon vibration at 800 wavenumber of the sample obviously disappears, showing the infrared spectrum of a typical carbon material. Such as Figure 16 As shown, the porous carbon material of this example has a 5% weight loss in dry air at about 480°C, and its thermal stability is significantly better than that of the precursor polytetraphenylmethane and the porous carbon materials of Examples 1 and 2, indicating that with the As the activation temperature increased, the thermal stability of porous carbon mater...

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Abstract

The invention relates to a porous carbon material and a method for preparing the same. The method for preparing the porous carbon material comprises the following steps of: using porous organic framework material poly-tetraphenylmethane as a raw material, taking alkali metal hydroxide such as KOH, NaOH or CsOH as an activating agent, and mixing the raw material and the alkali metal hydroxide in a certain proportion; under the condition of nitrogen flow, slowly programmable heating up to the activation temperature from the room temperature; and maintaining the nitrogen flow, controlling the temperature to be the activation temperature, and carrying out activation for at least 30 minutes to obtain the porous carbon material. The preparation method of the porous carbon material is simple in technology; and the porous carbon material prepared by the method is high in specific surface area and heat stability and uniform in pore size distribution, and has good gas storage property.

Description

technical field [0001] The present invention relates to a method for preparing porous carbon material and the porous carbon material prepared by the method, especially a method for preparing porous carbon material by using organic porous framework material polytetraphenylmethane (PAF-1) as raw material and using the method porous carbon materials prepared by the method. Background technique [0002] Due to the rich pore structure and high specific surface area, porous carbon materials are widely used in daily life and industrial production, such as: harmful gas absorption, pollutant adsorption, gas storage and separation, etc. Judging from some literature reports in the past fifteen years, especially in the past five years, the application research progress of porous carbon materials in the field of catalysis is getting faster and faster, and the fields involved are getting wider and wider. In addition, due to the large specific surface area of ​​porous carbon materials, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/312C01B32/348
Inventor 贲腾裘式纶李艳强
Owner ZHUHAI PAINTER TECH
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