Method for quickly synthesizing block graded pore structural nitrogenous porous carbon

A pore structure and graded technology, which is applied in the field of rapid synthesis of bulk porous carbon, can solve the problems of high energy consumption, long synthesis time, and cumbersome carbon material molding, and achieve the effect of short synthesis cycle and simple process

Inactive Publication Date: 2010-06-09
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the defects of long synthesis time, high energy consumption, difficult surface chemical control, cumbersome carbon material molding (commonly in powder form) and relative

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  • Method for quickly synthesizing block graded pore structural nitrogenous porous carbon
  • Method for quickly synthesizing block graded pore structural nitrogenous porous carbon
  • Method for quickly synthesizing block graded pore structural nitrogenous porous carbon

Examples

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Example Embodiment

[0069] Example 1

[0070] First dissolve 3g of resorcinol in 10ml of water, then weigh 1.0g of lysine and dissolve it in 5ml of water; add the lysine solution to the resorcinol solution at room temperature and stir for 10min to obtain a colorless transparent solution ; Then, under stirring conditions, 4.42g of formaldehyde was quickly injected into the above solution, the solution was instantly transformed from colorless and transparent to a white polymer block; after drying at 50 ℃ for 24 hours, carbonization, protected with inert gas from room temperature at 1 ℃ / min The temperature is increased to 400°C, and the temperature is kept constant for 60 minutes for drying; and then the temperature is increased from 400°C to 800°C, the final carbonization temperature at a rate of 1°C / min, and the temperature is kept constant for 120 minutes. Surface area 550m 2 g -1 , Pore volume 0.30cm 3 g -1 . figure 1 The graded pore structure of nitrogen-containing porous carbon, digital photos of...

Example Embodiment

[0071] Example 2

[0072] First dissolve 3g of resorcinol in 15ml of water, then weigh 1.0g of lysine and dissolve it in 5ml of water; add the lysine solution to the resorcinol solution at room temperature and stir for 10min to obtain a colorless transparent solution ; Then, under stirring conditions, add 250 microliters of oleic acid dropwise to the above system, adjust the pH to 6, and stir for 30 minutes; quickly inject 4.42 g of formaldehyde into the above solution, and the solution instantly transforms from colorless and transparent to white colloid; Aging in an oven at 50°C for 4h; after drying at 50°C for 24h, carbonizing, using inert gas protection from room temperature at 1°C / min to 400°C, and drying at a constant temperature of 60min; then at a heating rate of 1°C / min from 400°C To the final carbonization temperature of 800 ℃, constant temperature for 120 minutes, the carbonization obtains a nitrogen-containing porous carbon with a low density and hierarchical pore stru...

Example Embodiment

[0073] Example 3

[0074] First dissolve 3g of resorcinol in 16ml of water, then weigh 150 microliters of ethylenediamine solution; add to the resorcinol solution at room temperature and stir for 10min to obtain a colorless and transparent solution; then, under stirring conditions, Add oleic acid dropwise to the above system, adjust the pH to 6, and stir for 30 minutes; quickly inject 4.42 g of formaldehyde into the above solution, and the solution will instantly turn from colorless and transparent to white colloid; transfer to an oven at 50°C and age the gel for 4 hours After drying at 50°C for 24 hours, then carbonizing, using inert gas protection from room temperature at 1°C / min to 400°C, and drying at a constant temperature of 60min; then at a heating rate of 1°C / min from 400°C to the final carbonization temperature of 800°C, Constant temperature for 120 minutes, carbonization obtains a nitrogen-containing porous carbon with a low-density hierarchical pore structure and a nit...

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Abstract

The invention relates to a method for quickly synthesizing block graded pore structural nitrogenous porous carbon. The method can synthesize characteristic porous carbons which comprise graded pore structural nitrogenous porous carbon, macropore-rich graded pore structural nitrogenous porous carbon, macropore-rich ordered nitrogenous mesoporous carbon and graded pore structural nitrogenous magnetic porous carbon. The porous carbon is quickly synthesized in one step by resorcinol and formaldehyde serving as raw materials, amino acid or imidazole compounds and organic amine serving as catalysts and water or ethanol aqueous solution serving as a solvent through a sol-gel process. The flow is simple, the preparation cost is low, the purity of a product is high, the selective range of raw materials is broad, and the method is convenient to apply and easy to implement large-scale preparation and has large application potential and market prospect.

Description

technical field [0001] The invention relates to a process for rapidly synthesizing bulk porous carbon, which can be used to synthesize porous carbons with different characteristics, including nitrogen-containing porous carbon with hierarchical pore structure, nitrogen-containing porous carbon with rich macropore hierarchical pore structure, and nitrogen-rich porous carbon with hierarchical pore structure. Macroporous ordered nitrogen-containing mesoporous carbon and nitrogen-containing magnetic porous carbon with hierarchical pore structure. Background technique [0002] Porous carbon is a porous carbonaceous material that integrates nanospace, ultrafine particles and surface solids. It has a rich pore structure and surface functional groups, and has shown good application prospects in many fields. However, the current synthesis process is complicated, the synthesis cycle is long, and the synthesized carbon materials are mostly powdery, and there are problems such as separat...

Claims

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Application Information

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IPC IPC(8): C01B31/02C04B35/52C04B35/624C04B38/00
Inventor 陆安慧郝广平李文翠王帅
Owner DALIAN UNIV OF TECH
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