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Method for one-step controllable preparation of porous nitrogen-doped carbon material

A nitrogen-doped carbon material technology is applied in the field of one-step preparation of porous nitrogen-doped carbon materials, which can solve the problems of complex synthesis procedures, cumbersome steps, and unenvironmentally friendly processes, and achieves wide raw material sources, large product yield, and good repeatability. Effect

Pending Publication Date: 2019-04-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation methods of traditional carbon materials have problems such as complex synthesis procedures, unenvironmental protection, uncontrollable pore size, and unsuitability for mass production. Especially after the introduction of nitrogen sources, the process is more difficult and the steps become more cumbersome. , and the cost increases accordingly

Method used

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  • Method for one-step controllable preparation of porous nitrogen-doped carbon material
  • Method for one-step controllable preparation of porous nitrogen-doped carbon material
  • Method for one-step controllable preparation of porous nitrogen-doped carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of porous nitrogen-doped carbon material, its preparation method comprises the steps:

[0032] 1) Weigh 1g of glucose and 1g of urea respectively, place them in a small beaker, and keep them warm at 90°C for 30 minutes to slowly melt the mixed solids to form a jelly;

[0033] 2) Continue to heat up the obtained jelly to 120°C, and magnetically stir for about 2 hours to form a transparent and clear brown colloidal solution;

[0034] 3) The obtained colloidal solution was placed in a microwave oven and microwaved at a power of 900W for 5 minutes to form a black fluffy foamy solid, which was ground to obtain a yellow-brown solid;

[0035] 4) The obtained yellow-brown solid was pretreated at 350° C. for 4 hours under a nitrogen atmosphere, then heated to 900° C. for 10 hours, and cooled to room temperature to obtain a porous nitrogen-doped carbon material.

[0036] figure 1 For the nitrogen adsorption / desorption curve of the product obtained in the present inventio...

Embodiment 2

[0038] A kind of porous nitrogen-doped carbon material, its preparation method comprises the steps:

[0039] 1) Weigh 1g of glucose and 2g of urea respectively, place them in a small beaker, and keep them warm at 100°C for 30 minutes to slowly melt the mixed solids and form a jelly;

[0040] 2) Continue to heat up the obtained jelly to 120°C, and magnetically stir for about 2 hours to form a transparent and clear brown colloidal solution;

[0041] 3) The obtained colloidal solution was placed in a microwave oven and microwaved at a power of 900W for 5 minutes to form a black fluffy foamy solid, which was ground to obtain a yellow-brown solid;

[0042] 4) The obtained yellow-brown solid was pretreated at 350° C. for 4 hours under a nitrogen atmosphere, then heated to 700° C. for 10 hours, and cooled to room temperature to obtain a porous nitrogen-doped carbon material.

[0043] figure 2 It is the nitrogen adsorption / desorption curve of the product obtained in the present inv...

Embodiment 3

[0046] A kind of porous nitrogen-doped carbon material, its preparation method comprises the steps:

[0047] 1) Weigh 2g of sucrose and 1g of urea respectively, place them in a small beaker, and keep them warm at 90°C for 30 minutes to slowly melt the mixed solids to form a jelly;

[0048] 2) Continue to heat up the obtained jelly to 120°C, and magnetically stir for about 2 hours to form a transparent and clear brown colloidal solution;

[0049] 3) The obtained colloidal solution was placed in a microwave oven and microwaved at a power of 900W for 5 minutes to form a black fluffy foamy solid, which was ground to obtain a yellow-brown solid;

[0050]4) The obtained yellow-brown solid was pretreated at 350° C. for 4 hours under a nitrogen atmosphere, then heated to 800° C. for 10 hours, and cooled to room temperature to obtain a porous nitrogen-doped carbon material.

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Abstract

The invention discloses a method for one-step controllable preparation of a uniform porous nitrogen-doped carbon material. Organic sugar and urea serve as raw materials, and the organic sugar and theurea are melted in proportion to form a homogeneous system; drying is carried out to preliminarily and rapidly remove a residual solvent; high-temperature treatment is carried out, so that the organicsugar is polymerized and carbonized at a high temperature, the urea is decomposed, and one-step synthesis of the porous nitrogen-doped carbon material is achieved. The raw materials involved in the method are cheap and easy to obtain, and the synthesis process is simple and environmentally friendly; the obtained carbon material is provided with graded pores including micropores and mesopores, controllable adjustment of the nitrogen doping amount, the porosity and the specific surface area can be realized, and the material has excellent optical, mechanical, electronic and energy storage capacity and has good application prospects in the fields of gas adsorption, adsorption of sulfur-containing and nitrogen-containing substances in oil, electrode materials, catalyst carriers and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a method for preparing porous nitrogen-doped carbon materials in one step. Background technique [0002] Carbon materials have a large specific surface area, rich pore structure, and rich surface functional groups, which make them have broad application prospects in many fields; and heteroatom-doped carbon materials, especially nitrogen-doped carbon materials, are rich in Nitrogen-containing functional groups can further improve the conductivity and electrocatalytic activity of porous carbon materials, and have excellent optical, mechanical, electronic, and energy storage capabilities. Carriers and other fields have good application prospects. [0003] The preparation process involved in traditional porous carbon materials (especially microporous carbon materials) is relatively complicated, usually including vapor phase deposition, hydrothermal method and templ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01P2002/80C01P2002/85C01P2006/12C01B32/05
Inventor 姜兴茂熊春艳刘富川唐慧高家俊
Owner WUHAN INSTITUTE OF TECHNOLOGY
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