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A kind of b, n co-doped porous carbon nanosheet and its preparation method and application

A technology of porous carbon and nanosheets, applied in the manufacture of nanocarbons, hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of unfavorable low-cost production of carbon nanosheets and complicated preparation process, and achieve excellent electrochemical performance , Simple operation and low energy consumption

Inactive Publication Date: 2019-11-22
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of b, n co-doped porous carbon nanosheet and its preparation method and application
  • A kind of b, n co-doped porous carbon nanosheet and its preparation method and application
  • A kind of b, n co-doped porous carbon nanosheet and its preparation method and application

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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 2.5h, stand for 1h and then separate into layers, separate the light yellow viscous liquid in the lower layer and add distilled water Washed to neutrality and dried in vacuo to obtain bis(2-chloroethyl)amine.

[0071] Then, 2g of bis(2-chloroethyl)amine and 8g of boric acid were mixed and dissolved in 50mL of DMF, and oil bathed at 70°C for 2.5h. After the reaction was completed, 95% ethanol was added, poured out while hot, cooled naturally, and precipitated out. Crystallization to obtain bis(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 h. The carbonized material was washed with distilled water until neutral, and finally the product was dri...

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, stand for 2h and then separate into layers. The lower layer of pale yellow viscous liquid is separated and washed with distilled water. to neutrality and vacuum drying to obtain bis(2-chloroethyl)amine.

[0076] Then, 2g of bis(2-chloroethyl)amine and 6g of boric acid were mixed and dissolved in 50mL of DMF, and the oil bath was carried out at 80°C for 3h. After the reaction was completed, 90% ethanol was added, poured out while hot, and cooled naturally to precipitate crystals. , to obtain bis(2-chloroethyl)aminoboronic acid, extract and rotate 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 The temperature was raised to 700 °C at a rate of 3 °C / min under the protection of , and carbonized for 3 h. The carbonized material was was...

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, stand for 0.8h and then separate into layers. Separate the light yellow viscous liquid in the lower layer and add distilled water. Washed to neutrality and dried in vacuo to obtain bis(2-chloroethyl)amine.

[0081] Then, 2 g of bis(2-chloroethyl)amine and 10 g of boric acid were mixed and dissolved in 50 mL of DMF, and oil bathed at 60 ° C for 2.5 h. After the reaction was completed, 90% ethanol was added, poured out while hot, cooled naturally, and precipitated. Crystallization to obtain 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 h. The carbonized material was washed with distilled water until neutral, 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 present invention designs a carbon material and a preparation method thereof, in particular to a B, N co-doped porous carbon nanosheet for supercontainer 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 framework and a porous ultra-thin sheet-like structure. Such materials usually have the advantages of well-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 It has strong application potential in many fields such as adsorption and separation and energy storage. [0003] The variety and quantity of pure CNS surface functional groups are small, and the high specific surfac...

Claims

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Application Information

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Patent Type & Authority Patents(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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