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Method for preparing high-content nitrogen-doped porous carbon materia

A technology of nitrogen-doped porous carbon with high content, applied in the field of nanomaterials, can solve problems such as unsuitable for industrial applications, cumbersome and complicated process, unfriendly environment, etc., to achieve large-scale mass production, wide source of raw materials, simple and effective method Effect

Active Publication Date: 2014-07-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although porous carbon with high nitrogen content can be obtained by in-situ nitrogen doping, there are still many problems, such as: the preparation process requires the use of many organic chemical reagents, which are relatively expensive; the template removal process requires the use of hydrofluoric acid and other strong corrosive agents, the process is cumbersome and unfriendly to the environment, so this method is not suitable for industrial applications

Method used

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  • Method for preparing high-content nitrogen-doped porous carbon materia
  • Method for preparing high-content nitrogen-doped porous carbon materia
  • Method for preparing high-content nitrogen-doped porous carbon materia

Examples

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Embodiment 1

[0029] Such as figure 1 as shown, figure 1 It is a flowchart of the preparation method of the high-content nitrogen-doped porous carbon material shown in Example 1.

[0030] A method for preparing a high-content nitrogen-doped porous carbon material, comprising the following steps: placing corncobs as a raw material of biomass in a blast drying oven, drying at 100°C for at least 24 hours, and controlling the particle size after pulverization and sieving 500um, put the corn cob particles with a particle size of 500um into the material boat, and place the material boat in the atmosphere furnace; vacuumize the sealed furnace tube, and then replace it with nitrogen twice, and carry out the furnace tube under nitrogen atmosphere. Heating, the flow rate of nitrogen gas is 0.5L / min, the heating rate is 5°C / min, the temperature is slowly raised from room temperature to 400°C, the treatment time is 3 hours, and the temperature is kept at 400°C for 3h; after high-temperature carbonizat...

Embodiment 2

[0036]A method for preparing a high-content nitrogen-doped porous carbon material, comprising the following steps: placing corncobs as a raw material of biomass in a blast drying oven, drying at 100°C for at least 24 hours, and controlling the particle size after crushing and sieving to 500um, put the corn cob particles with a particle size of 500um into the material boat, and place the material boat in the atmosphere furnace; vacuumize the sealed furnace tube, and then replace it with nitrogen twice, and carry out the furnace tube under nitrogen atmosphere. Heating, the flow rate of nitrogen gas is 0.5L / min, the heating rate is 5°C / min, the temperature is slowly raised from room temperature to 300°C, the treatment time is 3 hours, and the temperature is kept at 300°C for 3h; after high-temperature carbonization treatment, when the temperature is 300°C , and then quickly evacuate the furnace tube, replace the nitrogen with ammonia for at least three times, and clean the furnace...

Embodiment 3

[0038] A method for preparing a high-content nitrogen-doped porous carbon material, comprising the following steps: placing the biomass raw material coconut shell in a blast drying oven, drying at 150°C for at least 24 hours, and controlling the particle size after crushing and sieving to 880um, put the coconut shell particles with a particle size of 880um into the material boat, and place the material boat in the atmosphere furnace; vacuumize the sealed furnace tube, and then replace it with nitrogen twice. Heating, the flow rate of nitrogen gas is 1L / min, the heating rate is 3°C / min, the temperature is slowly raised from room temperature to 300°C, the treatment time is 0.5 hours, and the temperature is kept at 300°C for 3h; after high-temperature carbonization treatment, when the temperature is 300°C, Then quickly evacuate the furnace tube, replace the nitrogen with ammonia for at least three times, and clean the furnace with ammonia; continue to program the temperature rise ...

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Abstract

The invention discloses a method for preparing a high-content nitrogen-doped porous carbon material. The method includes the following steps: drying and crushing a biomass raw material to obtain granules, performing a high temperature carbonization treatment in a nitrogen atmosphere, and then performing a high temperature ammoniation treatment in an ammonia atmosphere to obtain the high-content nitrogen-doped porous carbon material. The method disclosed by the invention is simple and effective, easy to operate, convenient for large-scale volume production and is suitable for application in industrial production; in a material preparation process, pore forming and nitrogen doping are performed at the same time and are finished in one step, and therefore the method is simple and effective.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a high-content nitrogen-doped porous carbon material. Background technique [0002] Porous carbon materials refer to carbon materials with different pore structures. The pore size can be adjusted according to the requirements of practical applications (such as the size of adsorbed molecules, etc.), so that the size is between nano-scale micropores and micron-scale macropores. Porous carbon materials have the properties of carbon materials, such as high chemical stability, good electrical conductivity, and low price. At the same time, the introduction of pore structure makes it have the characteristics of large specific surface area, controllable pore structure, and adjustable pore size. These advantages make it widely concerned in the research of energy storage and separation, mainly focusing on hydrogen storage, methane storage, selective adsor...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/05
Inventor 张存满耿振王达斌周向阳
Owner TONGJI UNIV
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