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Porous carbon material and preparation method thereof

A technology for porous carbon materials and wood, applied in the field of porous carbon materials and their preparation, can solve the problems of unreusable template agent, cumbersome preparation process, long preparation cycle, etc., and achieves improved use value, simple preparation process, and excellent physical properties. Effect

Inactive Publication Date: 2018-05-25
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the above method is cumbersome, the preparation cycle is long, and the template agent cannot be reused, the cost is high, and the environment is polluted.

Method used

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  • Porous carbon material and preparation method thereof
  • Porous carbon material and preparation method thereof
  • Porous carbon material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of porous carbon material includes the following steps:

[0040] Step 1: Cut the natural fir with a miniature electric saw into wood chips with a thickness of 5mm; put the wood chips in an oven at 60°C for 24 hours until the moisture content of the wood chips drops to 3%;

[0041] Step 2: Put the dried wood chips into a tube furnace and heat to 200°C for the first calcination for 6 hours; make the bound water in the wood chips evaporate; then turn off the tube furnace and lower the temperature at room temperature;

[0042] Step 3: Take the cooled wood chips out of the tube furnace and immediately soak them in a 1mol / L potassium hydroxide aqueous solution for 5 hours, and then dry them in an oven at 60°C to remove free water in the wood chips;

[0043] Step 4: Put the wood chips obtained in Step 3 into a tube furnace and heat them with inert gas at a rate of 15°C / min to 1000°C for a second calcination for 2 hours, so that the low molecular weight substances i...

Embodiment 2

[0047] A preparation method of porous carbon material includes the following steps:

[0048] Step 1: Cut the natural fir with a miniature electric saw into thin slices of horizontal, diameter, and string with a thickness of 5μm; put the wood chips in an oven at 60℃ for 24 hours, until the moisture content of the wood chips drops to 2% ;

[0049] Step 2: Put the dried wood chips into a tube furnace and heat to 200°C for the first calcination for 6 hours; make the bound water in the wood chips evaporate; then turn off the tube furnace and lower the temperature at room temperature;

[0050] Step 3: Take the cooled wood chips out of the tube furnace and immediately soak them in a 2mol / L potassium hydroxide aqueous solution for 6 hours, and then dry them in an oven at 60°C to remove free water in the wood chips;

[0051] Step 4: Put the wood chips obtained in Step 3 into a tube furnace and heat it with inert gas at a rate of 5°C / min to 1100°C for a second calcination for 2 hours, so that t...

Embodiment 3

[0055] A preparation method of porous carbon material includes the following steps:

[0056] Step 1: Cut the natural fir with a miniature electric saw into thin slices of horizontal, diameter, and string with a thickness of 5 μm; put the wood chips in a 60 ℃ oven for 24 hours, until the moisture content of the wood chips drops to 4%;

[0057] Step 2: Put the dried wood chips into a tube furnace and heat to 200°C for the first calcination for 6 hours; make the bound water in the wood chips evaporate; then turn off the tube furnace and lower the temperature at room temperature;

[0058] Step 3: Take the cooled wood chips out of the tube furnace and immediately soak them in a 3mol / L potassium hydroxide aqueous solution for 2 hours, and then dry them in an oven at 60°C to remove free water in the wood chips;

[0059] Step 4: Put the wood chips obtained in Step 3 into a tube furnace and heat it with inert gas at a rate of 5°C / min to 1100°C for a second calcination for 2 hours, so that the ...

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Abstract

The invention discloses a natural wood porous carbon material and a preparation method thereof. The porous carbon material is prepared by: heating natural wood cut into pieces in air for the purpose of pretreatment, soaking in a strong base solution, drying, and performing high temperature pyrolysis under protective gas; a strong base herein is one of sodium hydroxide, potassium hydroxide, lithiumhydroxide, calcium hydroxide and barium hydroxide. The porous carbon material has large specific surface area, good uniformity of pore distribution and good conductivity, as well as improved chemicalreaction activity; the porous carbon material prepared herein is widely applicable and is suitable for use in energy storage, adsorption, water treatment and other aspects. The porous carbon materialis prepared by means of physical soaking; the preparation method is simple and feasible; the porous carbon material is green; the materials are widely resourceful and low in cost.

Description

Technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and more specifically, relates to a porous carbon material and a preparation method thereof. Background technique [0002] Carbon materials have been applied in many fields, such as lithium-ion, sodium-ion batteries, supercapacitors, etc. in the field of energy storage and conversion, as well as adsorption and separation, and catalyst carriers. However, ordinary carbon materials have a small specific surface area and relatively poor adsorption performance, which hinders their wider application. [0003] Porous carbon materials mainly include activated carbon, activated carbon fiber, carbon molecular sieve, and carbon nanotubes newly developed in the 1990s. Microporous porous carbon materials are synthesized through an activation process. Among them, disordered mesoporous porous carbon materials can be synthesized in a variety of ways, including metal catalytic activat...

Claims

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Application Information

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IPC IPC(8): C01B32/05
Inventor 卢芸殷亚方刘波张永刚许明坤姜笑梅
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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