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Method for preparing porous carbon micron tube from catkin, poplar seed or phoenix tree seed as raw material

A technology of micron tubes and porous carbon, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of limited application and small specific surface area, and achieve good catalytic oxygen reduction reaction performance and capacitance characteristics, catalytic oxygen reduction good response performance

Inactive Publication Date: 2012-07-11
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore structure of carbon microtubes obtained by this method is simple and the specific surface area is relatively small, which limits its application as energy and environmental materials.

Method used

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  • Method for preparing porous carbon micron tube from catkin, poplar seed or phoenix tree seed as raw material
  • Method for preparing porous carbon micron tube from catkin, poplar seed or phoenix tree seed as raw material
  • Method for preparing porous carbon micron tube from catkin, poplar seed or phoenix tree seed as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Using the chemical activation method, poplar catkins were placed in a tube furnace and carbonized under Ar atmosphere, and then ZnCl 2 After soaking the solution for 10-20 h, place it in the center of a tube furnace, heat it up to 500-2000 °C in an Ar atmosphere, activate it for 0.5-10 h, and then naturally cool it to room temperature in an Ar atmosphere, and finally wash and dry it to obtain a microporous carbon micron. Tube. Using the physical activation method, poplar catkins are placed in a tube furnace and carbonized for a period of time under Ar atmosphere, then the temperature is raised to 800-2000 °C, and then CO 2 Gas activation for 0.5-10 h, and finally cooled to room temperature under Ar atmosphere to obtain the product. Using the chemical physical activation method, the product obtained by the chemical activation method is placed in the middle of the tube furnace, and then CO 2 Gas treatment for 10-60 min, cooling to room temperature to obtai...

Embodiment 2

[0048] Embodiment 2: Using the chemical activation method, poplar catkins were placed in a tube furnace and carbonized under an Ar atmosphere, then impregnated with a KOH solution for 10-20 h, placed in the center of the tube furnace, and heated to 500-2000 °C under an Ar atmosphere. After activation for 0.5-10 h, it was naturally cooled to room temperature under Ar atmosphere, and finally the porous carbon microtubes were washed and dried. Using the physical activation method, poplar catkins are placed in a tube furnace and carbonized for a period of time under Ar atmosphere, then the temperature is raised to 800-2000 °C, and then CO 2 Gas activation for 0.5-10 h, and finally cooled to room temperature under Ar atmosphere to obtain the product. Using the chemical physical activation method, the product obtained by the chemical activation method is placed in the middle of the tube furnace, and then CO 2 Gas treatment for 10-60 min, cooling to room temperature to obtain mes...

Embodiment 3

[0049] Embodiment 3: Using the chemical activation method, poplar catkins were carbonized in a tube furnace under an Ar atmosphere, and then treated with H 3 PO 4 After soaking the solution for 10-20 h, place it in the center of a tube furnace, heat it up to 500-2000 °C in an Ar atmosphere, activate it for 0.5-10 h, then cool it to room temperature naturally in an Ar atmosphere, and finally wash and dry the porous carbon micron Tube. Using the physical activation method, poplar catkins are placed in a tube furnace and carbonized for a period of time under Ar atmosphere, then the temperature is raised to 800-2000 °C, and then CO 2 Gas activation for 0.5-10 h, and finally cooled to room temperature under Ar atmosphere to obtain the product. Using the chemical physical activation method, the product obtained by the chemical activation method is placed in the middle of the tube furnace, and then CO 2 Gas treatment for 10-60 min, cooling to room temperature to obtain mesoporo...

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Abstract

The invention discloses a method for preparing a porous (micro-porous and mesoporous) carbon micron tube from catkin, poplar seed or phoenix tree seed as a raw material. According to the method disclosed by the invention, the porous carbon micron tube can be prepared from natural biomasses such as the poplar seed, the catkin or the phoenix tree seed by using a chemical activation method, a physical activation method and a chemical and physical activation method under different conditions. The method disclosed by the invention has the characteristics of simple process, low cost, environment friendliness and the like. The specific surface area of the obtained micro-porous carbon micron tube can reach 1000-2000m<2> / g and the specific surface area of the obtained mesoporous) carbon micron tube can reach 500-1000m<2> / g. The porous carbon micron tube obtained by the method disclosed by the invention has the advantages of large specific surface area, developed porous structure, favorable catalytic oxygen reduction performance and favorable capacitance characteristic and can be used as an electrode material of a supercapacitor and a fuel cell.

Description

technical field [0001] The invention relates to a method for preparing porous carbon microtubes by using poplar catkins, willow catkins or sycamore catkins as raw materials. [0002] Background technique [0003] Tubular and porous (microporous and mesoporous) carbon materials have become a research and application hotspot in the field of materials. Such materials mainly include: carbon nanotubes, carbon microtubes, activated carbon materials and mesoporous carbon materials. Due to the special tubular and porous structure, this kind of material has broad application prospects in the fields of energy, environment and electronics. Among them, carbon microtubes are unique in slow-release drugs, lithium-ion batteries, hydrogen storage, and supercapacitors due to their micron-scale diameters that can be filled with guest molecules. However, the low-cost and large-scale preparation of carbon microtubes is the main challenge for the current development of this class of materials...

Claims

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Application Information

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IPC IPC(8): C01B31/08C01B31/10C01B31/12C01B32/318C01B32/336C01B32/342C01B32/348
Inventor 黄维马延文黄雯赵进张玲榕熊传银孙丽莹濮丹凤张自强周亚运
Owner NANJING UNIV OF POSTS & TELECOMM
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