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Method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof

A kudzu root-based mesoporous and nitrogen-doped technology, which is applied in the direction of hybrid capacitor electrodes, can solve the problems of unseen mesoporous activated carbon materials, and achieve the effects of easy industrial production, wide application prospects, and simple preparation process

Active Publication Date: 2017-01-04
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] So far, there have been no relevant literature and patent reports on the preparation of mesoporous activated carbon materials using kudzu root as a carbon source, nitrogen doping and activation treatment

Method used

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  • Method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof
  • Method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof
  • Method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Wash the kudzu root with water, cut it into discs with a thickness of 5mm, and dry it in a constant temperature drying oven at 100°C for 24 hours to obtain the kudzu root slices on a dry basis. Collect the undersieve to obtain kudzu root powder.

[0040] (2) 2.5g melamine was dissolved in 70mL distilled water earlier, then 5g kudzu root powder was added thereto, after stirring at room temperature for 30min, the mixture was transferred to a high-pressure hydrothermal reactor whose liner was polytetrafluoroethylene. The volume filling ratio is 0.4. After hydrothermal treatment at 180°C for 12 hours, it is cooled to room temperature. The hydrothermal product is subjected to solid-liquid separation and washed until neutral, and then the solid is dried at 100°C to constant weight to obtain nitrogen-doped Miscellaneous kudzu root hydrothermal charcoal.

[0041] (3) Potassium carbonate is made into the solution of 2mol / L concentration, then the nitrogen-doped kudzu root h...

Embodiment 2

[0051] (1) Wash the kudzu root with water, cut it into discs with a thickness of 5mm, and dry it in a constant temperature drying oven at 100°C for 24 hours to obtain the kudzu root slices on a dry basis. Collect the undersieve to obtain kudzu root powder.

[0052] (2) Weigh 5g of ethylenediamine and place it in a 50ml crucible, cover it and put it into a muffle furnace, raise the temperature to 550°C at a rate of 2°C / min, then keep it warm for 4h, and take it out after the muffle furnace cools down to room temperature , after fully grinding, the powdered g-C 3 N 4 ,spare.

[0053] (3) Sodium hydroxide is made into a solution with a concentration of 1mol / L, and then the pueraria root powder obtained in step (1) is added thereto in a mass ratio of 1:1 with sodium hydroxide, and distilled water is added to control the liquid / solid mass ratio 10, stirred at room temperature for 12 hours, then dried and ground at 100°C to obtain a homogeneous mixture containing the activator. ...

Embodiment 3

[0062] (1) Wash the kudzu root with water, cut it into discs with a thickness of 5mm, and dry it in a constant temperature drying oven at 100°C for 24 hours to obtain the kudzu root slices on a dry basis. Collect the undersieve to obtain kudzu root powder.

[0063] (2) Add distilled water to the pueraria root powder obtained in step (1) and stir for 1 h to form a mixture with a liquid / solid mass ratio of 5, and transfer this mixture to a high-pressure hydrothermal reactor whose inner liner is polytetrafluoroethylene , the volume filling ratio is 0.6, after hydrothermal treatment at 180°C for 12h, it is cooled to room temperature, the hydrothermal product is subjected to solid-liquid separation and washed to neutrality, and then the solid is dried at 100°C to constant weight, that is, Pueraria root hydrothermal charcoal.

[0064] (3) Potassium phosphate is made into the solution of 3mol / L concentration earlier, then gained kudzu root base hydrothermal charcoal, unotropine, pot...

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Abstract

The invention discloses a method for preparing N-doped kudzuvine root-based mesoporous activated carbon and application thereof. The preparation method comprises the steps of pretreatment, nitrogen doping and activating treatment. The nitrogen content of the prepared material is 0.2-16%, the micropore volume is 0.1-0.8 cm3 / g, the mesoporous volume is 0.5-3.4 cm3 / g, the total specific area is 1000-3300 m2 / g, the mesoporous rate is 50-95%, the pore size distribution is 1-5 nm, and the average pore size is 2 to 4 nm. The prepared material involves the fields of electrochemical energy storage, adsorption separation, catalyst carriers and drug carrier and the like and is particularly suitable for electrochemical energy storage. According to the method, green biomass is adopted as a carbon source and is wide in source, low in cost, simple in process, easy to control, environmentally friendly and suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a novel carbon material, in particular to a preparation method and application of a nitrogen-doped kudzu root mesoporous activated carbon material. Background technique [0002] Carbon-based materials have attracted extensive attention due to their abundant raw material sources, large specific surface area, controllable pore structure, highly stable chemical and electrochemical properties, and environmental friendliness. Chemical composition, specific surface area, pore size distribution, microstructure and morphology are important factors affecting the performance of carbon-based materials. According to the classification of the International Union of Pure and Applied Chemistry (IUPAC), the pores of porous materials can be divided into micropores (<2nm), mesopores (2nm-50nm), and macropores (>50nm). Theoretically, the specific surface area of ​​a porous material consists of a mixture of macropore...

Claims

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Application Information

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IPC IPC(8): C01B31/12H01G11/34H01G11/24
CPCY02E60/13H01G11/34C01P2006/12C01P2006/14C01P2006/17H01G11/24
Inventor 刘恩辉蒋海霞王洛杨锃周杨帆
Owner XIANGTAN UNIV
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