B (or P) and N codoped perilla leaf porous carbon and preparation method thereof

A perilla leaf and porous carbon technology, applied in the field of plant resource utilization, can solve the problems of low specific capacitance, unsatisfactory comprehensive performance, and no reports related to perilla leaf porous carbon are found.

Inactive Publication Date: 2016-11-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the shells of nuts are mostly 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 porous carbon from perilla leaves at home and abroad.

Method used

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  • B (or P) and N codoped perilla leaf porous carbon and preparation method thereof
  • B (or P) and N codoped perilla leaf porous carbon and preparation method thereof
  • B (or P) and N codoped perilla leaf porous carbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Wash the perilla leaves with clean water to remove impurities, and grind them to 80 mesh with a grinder. Take 10g of perilla leaf powder, put it into 200mL of 1.5M boric acid solution, react in a high-pressure stainless steel kettle at 120°C for 2h, 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 ultrapure water until neutral. Finally, the product was dried to constant weight to obtain 0.81 g B, N co-doped perilla leaf porous carbon. BET specific surface area up to 462m 2 g -1 , with an average pore size of 4.25nm and an ideal pore size distribution.

Embodiment 2

[0077] Wash the perilla leaves with clean water to remove impurities, and grind them to 80 mesh with a grinder. Take 10g of perilla leaf powder, put it into 200mL of 1.5M boric acid solution, react in a high-pressure stainless steel kettle at 120°C for 2h, 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 -1Raise the temperature to 750°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with ultrapure water until neutral. Finally, the product was dried to constant weight to obtain 0.81 g B, N co-doped perilla leaf porous carbon. N (wt%) content is 1.5%, B (wt%) content is 3.3%, such as Figure 1 The BET specific surface area of ​​the prepared biochar is as high as 573m 2 g -1 , the average pore size is 5.94nm, and has an ideal pore size distribution, and the size or size of the pore size is relatively uniform. Depe...

Embodiment 3

[0079] Wash the perilla leaves with clean water to remove impurities, and grind them to 80 mesh with a grinder. Take 10g of perilla leaf powder, put it into 200mL of 1.5M boric acid solution, react in a high-pressure stainless steel kettle at 120°C for 2h, 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 800°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with ultrapure water until neutral. Finally, the product was dried to constant weight to obtain 0.81 g B, N co-doped perilla leaf porous carbon. BET specific surface area up to 852m 2 g -1 , with an average pore size of 6.27nm and an ideal pore size distribution.

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Abstract

The invention relates to B (or P) and N codoped perilla leaf porous carbon. According to the B (or P) and N codoped perilla leaf porous carbon, perilla leaves are used as raw materials, a boric acid solution and / or a phosphoric acid solution are / is used as a doping addition agent, and through high temperature thermolysis (carbonization), a porous carbon material is prepared. A method for the B (or P) and N codoped perilla leaf porous carbon comprises the following steps of thoroughly cleaning the perilla leaves, drying the cleaned perilla leaves, performing high-temperature high-pressure treatment at 120 DEG C, and then performing high-temperature carbonization under gas protection so as to obtain the B (or P) and N codoped perilla leaf porous carbon. The carbon material prepared by the method disclosed by the invention is large specific surface area and simple in technology, besides, the raw materials are easy to obtain, when the carbon material is used as an electrode material of a supercapacitor, the carbon material has excellent capacitance properties and good cycling stability, the potential of the perilla leaves in energy source field is prominent, and the utilization value of the perilla leaves is increased.

Description

technical field [0001] The invention belongs to the field of plant resource utilization and the field of biomass carbon preparation, and in particular relates to a B (or P), N co-doped perilla leaf porous carbon used 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] Perilla, known as Eren in ancient times, also known as Baisu, Chisu, Red Su, Wild Su, Su Ma, Fragrant Su, Black Su, etc., belongs to Dicotyledoneae, Synpetalia, Lamiaceae, and Perilla. The annual herb is listed as one of the 60 kinds of traditional Chinese medicines for both medicine and food promulgated by the Ministry of Health o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/12H01G11/34
CPCY02E60/13H01G11/34C01P2006/12C01P2006/16
Inventor 黎华明刘备阳梅陈红飙高勇杨端光
Owner XIANGTAN UNIV
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