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A nitrogen-doped 3D porous carbon material and a preparation method and application thereof

A technology of porous carbon materials and nitrogen doping, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of high price and complicated process, and achieve the effect of simple method, good activity and high catalytic activity

Active Publication Date: 2018-12-18
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the high price of raw materials, complicated process, and strong acid and strong alkali etching in the traditional porous carbon preparation method, the purpose of the present invention is to provide a nitrogen-doped 3D porous carbon material and method prepared by cellulase pretreatment

Method used

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  • A nitrogen-doped 3D porous carbon material and a preparation method and application thereof
  • A nitrogen-doped 3D porous carbon material and a preparation method and application thereof
  • A nitrogen-doped 3D porous carbon material and a preparation method and application thereof

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Embodiment 1

[0038] A method for preparing a nitrogen-doped 3D porous carbon material by using cellulase pretreatment, including the following steps:

[0039] (1) Disperse 1g of eucalyptus in 50mL of 10U / mL cellulase solution (neutral conditions, cellulase purchased from Shanghai Yuanye Biotechnology Co., Ltd.), shake at a constant temperature of 40℃, 90rpm for 24h, filter , Washed with deionized water and dried at 60°C to obtain cellulase pretreated eucalyptus (ie, enzymatically treated eucalyptus);

[0040] (2) The eucalyptus pretreated by cellulase was calcined at a constant temperature at 700°C under nitrogen atmosphere for 1 hour (heating rate was 5°C / min) to obtain porous carbon material (ie enzyme-treated eucalyptus carbon);

[0041] (3) Mix the porous carbon material and ammonium chloride in water at a mass ratio of 1:20 (the mass-volume ratio of ammonium chloride to water is 20g:60mL), evaporate to dryness at 60°C, and grind in a nitrogen atmosphere at 900°C After calcination for 2 hour...

Embodiment 2

[0043] A method for preparing a nitrogen-doped 3D porous carbon material by using cellulase pretreatment, including the following steps:

[0044] (1) Disperse 1g of eucalyptus in 50mL of 10U / mL cellulase solution (cellulase dissolved in water), shake at 40℃, 90rpm for 24h, filter, wash and dry to obtain cellulase pre Treated eucalyptus

[0045] (2) The eucalyptus pretreated by cellulase was calcined at a constant temperature at 700°C under nitrogen atmosphere for 1 hour (heating rate was 5°C / min) to obtain porous carbon material (ie enzyme-treated eucalyptus carbon);

[0046] (3) Mix the porous carbon material and ammonium chloride in water at a mass ratio of 1:20 (the mass-volume ratio of ammonium chloride to water is 20g:60mL), evaporate to dryness at 60℃, and grind under nitrogen at 800℃ After calcination for 2 hours, the eucalyptus-based nitrogen-doped porous carbon pretreated by Venzyme (ie, nitrogen-doped 3D porous carbon material, nitrogen-doped porous carbon-800) is obtained...

Embodiment 3

[0048] A method for preparing a nitrogen-doped 3D porous carbon material by using cellulase pretreatment, including the following steps:

[0049] (1) Disperse 1g of eucalyptus in 50mL of cellulase solution with a concentration of 10U / mL, shake at a constant temperature of 40℃, 90rpm for 24h, filter, wash with deionized water, and dry at 60℃ to obtain cellulase pretreated Eucalyptus (ie enzyme-treated eucalyptus);

[0050] (2) After eucalyptus pretreated by cellulase, the obtained eucalyptus is calcined at a constant temperature at 700°C under nitrogen atmosphere for 1 hour (heating rate is 5°C / min) to obtain porous carbon material (ie enzyme-treated eucalyptus carbon);

[0051] (3) Mix the porous carbon material and ammonium chloride in water at a mass ratio of 1:20 (the mass-volume ratio of ammonium chloride to water is 20g:60mL), evaporate to dryness at 60°C, and grind in a nitrogen atmosphere at 1000°C After calcination for 2 hours, the eucalyptus-based nitrogen-doped porous carb...

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Abstract

The invention belongs to the technical field of battery catalysts, and discloses a nitrogen-doped 3D porous carbon material, and a preparation method and application thereof. The method comprises thefollowing steps: (1) pretreating a biomass material in a cellulase solution to obtain a pretreated biomass material, wherein the biomass material is eucalyptus and / or poplar; (2) carbonizing the pretreated biomass material to obtain a porous carbon material; (3) mixing porous carbon and nitrogen-containing compound in water, drying and carbonizing to obtain a nitrogen-doped three-dimensional porous carbon material; the carbonization temperature being 800 ~ 1000 DEG C. The nitrogen-doped three-dimensional porous carbon material of the invention has a high specific surface area, a multi-stage pore structure, good oxygen reduction and oxygen precipitation activities and high catalytic activity. The method of the invention is simple, and the raw material used is a biomass material, which is cheap, easy to obtain and renewable. The nitrogen-doped three-dimensional porous carbon material can be applied to the field of catalysis.

Description

Technical field [0001] The invention belongs to the technical field of battery catalysts, and relates to a nitrogen-doped 3D porous carbon material and a preparation method and application thereof, and in particular to a method and a method for preparing a nitrogen-doped 3D porous carbon material by pretreating eucalyptus with cellulase. application. The carbon material serves as a catalyst to electrocatalyze the cathode oxygen reduction reaction in the fuel cell. Background technique [0002] In recent years, environmental pollution and the shortage of fossil fuels have severely restricted the development of the world economy and the stability of the ecological environment. The development of green energy will play a key role in solving these problems. Using biomass and other renewable compounds as raw materials to prepare chemical devices to capture and store these energy sources is a crucial step in the process. Carbon materials are considered to be the most important elect...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/90Y02E60/50
Inventor 彭新文张磊黎立桂赵登科钟林新
Owner SOUTH CHINA UNIV OF TECH
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