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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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  • Summary
  • 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 relatively few macropores in the existing preparation process, the present invention proposes rapid synthesis block classification Method for nitrogen-containing porous carbon with pore structure

Method used

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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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Effect test

Embodiment 1

[0070] First, dissolve 3g resorcinol in 10ml water, then weigh 1.0g lysine and dissolve it in 5ml water; at room temperature, add the lysine solution into the resorcinol solution 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, and the solution changed from colorless and transparent to a white polymer block in an instant; after being dried at 50°C for 24 hours, it was carbonized, and protected from room temperature with an inert gas at 1°C / min Rising to 400°C, drying at a constant temperature for 60 minutes; then raising the temperature from 400°C to the final carbonization temperature of 800°C at a rate of 1°C / min, and holding a constant temperature for 120 minutes to obtain a bulk porous carbon with shape retention. The nitrogen adsorption test results show that Surface area 550m 2 g -1 , pore volume 0.30cm 3 g -1 . figure 1 It is the digital photo of the n...

Embodiment 2

[0072] First, dissolve 3g resorcinol in 15ml water, then weigh 1.0g lysine and dissolve it in 5ml water; at room temperature, add the lysine solution into the resorcinol solution and stir for 10min to obtain a colorless transparent solution ; Then, under stirring conditions, 250 microliters of oleic acid was added dropwise to the above-mentioned system, the pH was adjusted to 6, and stirred for 30 minutes; 4.42g of formaldehyde was quickly injected into the above-mentioned solution, and the solution instantly changed from colorless and transparent to a white colloid; Aging in an oven at 50°C for 4 hours; carbonized after drying at 50°C for 24 hours, protected by an inert gas from room temperature at 1°C / min to 400°C, and drying at a constant temperature for 60 minutes; then at a rate of 1°C / min from 400°C to To the final carbonization temperature of 800°C and constant temperature for 120 minutes, the carbonization obtained a nitrogen-containing porous carbon with a low-density ...

Embodiment 3

[0074] First, dissolve 3g of resorcinol in 16ml of water, then weigh 150 microliters of ethylenediamine solution; add it into the resorcinol solution at room temperature, and stir for 10 minutes 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 4.42g of formaldehyde into the above solution, and the solution changes from colorless and transparent to white colloid in an instant; transfer it to an oven at 50°C for gel aging for 4 hours ; After drying at 50°C for 24 hours, carbonize, protect with inert gas from room temperature to 400°C at a rate of 1°C / min, and dry at a constant temperature for 60 minutes; Constant temperature for 120min, carbonization to obtain nitrogen-containing porous carbon with low-density hierarchical pore structure, nitrogen adsorption test results show that the specific surface area is about 650m 2 g -1 , the pore volum...

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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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