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Loose porous structure asparagus biochar and preparation method thereof

A loose, porous, asparagus technology, applied in the field of plant resource utilization, can solve problems such as unsatisfactory comprehensive performance, no asparagus found, poor cycle stability, etc., and achieve easy operation of the carbonization process, cheap raw materials, and controllable temperature Effect

Inactive Publication Date: 2017-06-23
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, nut shells are used as biomass to prepare biochar. However, the specific surface area, pore size and pore size distribution of the prepared biochar materials still need to be improved and the specific capacitance per unit mass is still low. Poor stability
In other words, the overall performance is still not ideal
[0005] At present, there are no relevant reports on the preparation of biomass carbon by asparagus at home and abroad

Method used

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  • Loose porous structure asparagus biochar and preparation method thereof
  • Loose porous structure asparagus biochar and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0065] Cut the asparagus into 2-4cm pieces, wash off the sundries with water, and dry. The dried sample was mixed with 10g L -1 The KOH solution was heated at 90 °C for 120 min, followed by washing with a large amount of water. Take 10 g of the treated Asparagus japonica, put it into 200 mL of 1M KOH solution, react in a high-pressure stainless steel kettle at 130 ° C for 2 h, and then directly filter and dry. The activated and dried samples were placed in a high-temperature tube furnace under N 2 Under the protection of 5 ℃ min -1 Raise the temperature to 700°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with 1.0M HCl until neutral. Finally, the product was dried to a constant weight to obtain 0.411 g of asparagus biochar with a loose porous structure.

example 2

[0067] Cut the asparagus into 2-4cm pieces, wash off the sundries with water, and dry. The dried sample was mixed with 10g L -1 The KOH solution was heated at 90 °C for 120 min, followed by washing with a large amount of water. Take 10 g of treated Asparagus chinensis, put it into 200 mL of 1M KOH solution, and react in a high-pressure stainless steel kettle at 130° C. for 2 h; then directly filter and dry. The activated and dried samples were placed in a high-temperature tube furnace under N 2 Under protection, the temperature was raised to 800°C at a rate of 5°C / min, and carbonized at a constant temperature for 2 hours. The carbide was taken out at room temperature and washed with 1.0M HCl until neutral. Finally, the product was dried to constant weight to obtain 0.401 g of Asparagus biochar with a loose porous structure. Such as figure 1 The BET specific surface area of ​​the prepared biochar is as high as 1328m 2 g -1 , the average pore diameter is 2.17nm, and the si...

example 3

[0069] Cut the asparagus into 2-4cm pieces, wash off the sundries with water, and dry. The dried sample was mixed with 10g L -1 The KOH solution was heated at 90 °C for 120 min, followed by washing with a large amount of water. Take 10g of the treated Asparagus chinensis, put it into 200mL, 1M KOH solution, and react in a high-pressure stainless steel kettle at 130°C for 2h; then directly filter and dry. The activated and dried samples were placed in a high-temperature tube furnace under N 2 Under protection, the temperature was raised to 900°C at a rate of 5°C / min, and carbonized at a constant temperature for 2 hours. The carbide was taken out at room temperature and washed with 1.0M HCl until neutral. Finally, the product was dried to a constant weight to obtain 0.392 g of Asparagus biochar with a loose porous structure.

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Abstract

The invention discloses a juncus effuses biochar with loose porous structures. The juncus effuses biochar is a porous carbon material prepared by taking juncus effuses as a raw materials via high-temperature pyrolysis (carbonization). A preparation method comprises following steps: juncus effuses is washed, and is subjected to heating pretreatment in an alkaline liquor, is subjected to high temperature high pressure alkali boiling at 130 DEG C, and is subjected to high temperature carbonization under gas protection so as to obtain the juncus effuses biochar. The juncus effuses biochar is large in specific surface area; raw materials are easily available; the preparation method is simple; the juncus effuses biochar possesses excellent capacitive performance and cycling stability when the juncus effuses biochar is taken as an electrode material of supercapacitors; juncus effuses possesses potential in the field of energy; and application value is increased.

Description

technical field [0001] The invention belongs to the field of utilization of plant resources and the field of preparation of biomass carbon, and in particular relates to a loose and porous structure of Asparagus biochar for super container electrode materials and a preparation method thereof. Background technique [0002] In recent years, the use of pure natural biomass materials to prepare porous carbon materials has broad prospects. The carbonization process has the advantages of high heating rate and controllable heating process. The preparation of porous carbon materials has the characteristics of controllable morphology and scalability. [0003] Asparagus is a perennial fibrous plant of Poaceae. It is mostly distributed in mountainous areas. It has a wide range of adaptability, drought and barren tolerance, and does not compete with agriculture for land. It is a plant resource with broad prospects for development and utilization. At present, asparagus has not been widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318
Inventor 黎华明刘备阳梅陈红飙高勇杨端光
Owner XIANGTAN UNIV
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