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B,N-codoped porous carbon nanosheet and preparation method and usage thereof

A technology of porous carbon and nanosheets, which is applied in the fields of nanocarbon, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problems of complicated preparation process, disadvantageous low-cost production of carbon nanosheets, etc. Electrochemical performance, the effect of large specific surface area

Inactive Publication Date: 2018-09-14
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of templates with some special structures is complicated, which is not conducive to the low-cost production of carbon nanosheets.

Method used

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  • B,N-codoped porous carbon nanosheet and preparation method and usage thereof
  • B,N-codoped porous carbon nanosheet and preparation method and usage thereof
  • B,N-codoped porous carbon nanosheet and preparation method and usage thereof

Examples

Experimental program
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Effect test

example 1

[0070] Mix and dissolve 5g of bis(2-chloroethyl)amine hydrochloride and 15g of NaOH in 100mL of water, stir at room temperature for 2.5 hours, let stand for 1 hour and separate the layers, separate the light yellow viscous liquid in the lower layer and wash with distilled water Wash until neutral, and dry in vacuum to obtain di(2-chloroethyl)amine.

[0071] Then, mix and dissolve 2g of bis(2-chloroethyl)amine and 8g of boric acid in 50mL of DMF, and put it in an oil bath at 70°C for 2.5h. After the reaction is completed, add 95% ethanol, pour it out while it is hot, cool naturally, and precipitate Crystallization gives two (2-chloroethyl) aminoboronic acid.

[0072] Next, 1 g of bis(2-chloroethyl)aminoboronic acid was placed in a high-temperature tube furnace under N 2 The temperature was raised to 800°C at a rate of 4°C / min under the protection of , and carbonized for 2 hours. The carbonized material was washed with distilled water until neutral, and finally the product was...

example 2

[0075] Mix and dissolve 5g of bis(2-chloroethyl)amine hydrochloride and 20g of KOH in 100mL of water, stir at room temperature for 4h, let stand for 2h and then separate layers, separate the lower layer of light yellow viscous liquid and wash with distilled water To neutrality, vacuum drying to obtain two (2-chloroethyl) amine.

[0076] Then, mix and dissolve 2g of bis(2-chloroethyl)amine and 6g of boric acid in 50mL of DMF, and put it in an oil bath at 80°C for 3h. After the reaction is completed, add 90% ethanol, pour it out while it is hot, and let it cool naturally to precipitate crystals. , to obtain bis(2-chloroethyl)aminoboronic acid, which was obtained by extraction and rotary evaporation to obtain bis(2-chloroethyl)aminoboronic acid.

[0077] Next, 1 g of bis(2-chloroethyl)aminoboronic acid was placed in a high-temperature tube furnace under N 2 Under the protection of , the temperature was raised to 700°C at a rate of 3°C / min, and carbonized for 3h. The carbonized ...

example 3

[0080] Mix and dissolve 5g of bis(2-chloroethyl)amine hydrochloride and 10g of NaOH in 100mL of water, stir at room temperature for 2h, let it stand for 0.8h and then separate the layers, separate the lower layer of light yellow viscous liquid and wash with distilled water Wash until neutral, and dry in vacuum to obtain two (2-chloroethyl) amine.

[0081] Then, mix and dissolve 2g of bis(2-chloroethyl)amine and 10g of boric acid in 50mL of DMF, and place it in an oil bath at 60°C for 2.5h. After the reaction is completed, add 90% ethanol, pour it out while it is hot, cool naturally, and precipitate Crystallization gives bis(2-chloroethyl)aminoboronic acid.

[0082] Next, 1 g of bis(2-chloroethyl)aminoboronic acid was placed in a high-temperature tube furnace under N 2 The temperature was raised to 900°C at a rate of 6°C / min under the protection of , and carbonized for 2 hours. The carbonized material was washed with distilled water to neutrality, and finally the product was ...

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Abstract

The invention discloses a B,N-codoped porous carbon nanosheet and a preparation method. The preparation method comprises the following steps: using bi-(2-chloroethyl)benzylamine hydrochloride as a rawmaterial, mixing with alkali liquor to prepare bi-(2-chloroethyl)amine; then, enabling the bi-(2-chloroethyl)amine to react with boric acid to obtain bi-(2-chloroethyl)amido boric acid; and under theprotection of nitrogen, pyrolyzing the bi-(2-chloroethyl)amido boric acid, successfully preparing the B,N-codoped porous carbon nanosheet. The prepared porous carbon nanosheet is high in B,N content,and large in specific surface area. While the porous carbon nanosheet is used as a super capacitor electrode material, the capacitive performance is high, the rate capability is good, and the cycle life is long. The preparation method is simple in operation, and efficient in economy, and capable of realizing the industrial production of the B,N-codoped porous carbon nanosheet.

Description

technical field [0001] The invention designs a carbon material and a preparation method thereof, in particular relates to a B, N co-doped porous carbon nanosheet used for a super-container electrode material and a preparation method thereof, belonging to the technical field of carbon materials. Background technique [0002] Porous carbon nanosheet (CNS) material refers to a new type of two-dimensional material with carbon as the basic skeleton and a porous ultrathin sheet structure. Such materials usually have the advantages of developed pores, high specific surface area, ultra-thin two-dimensional sheet structure, good electrical conductivity, excellent physical and chemical stability, etc., making them suitable for heterogeneous catalysis, biosensing, gas Many fields such as adsorption and separation and energy storage have strong application potential. [0003] The types and quantities of functional groups on the surface of pure CNS are small, and the high specific surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15H01G11/32H01G11/86
CPCC01B32/15H01G11/32H01G11/86Y02E60/13
Inventor 黎华明刘备阳梅刘益江陈红飙
Owner XIANGTAN UNIV
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