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Preparation method and application of nitrogen-doped starch-based activated carbon microsphere material

A technology based on activated carbon microspheres and starch, which is applied in the direction of hybrid capacitor electrodes, etc., can solve problems that have not been seen, and achieve the effects of improved electrochemical performance, good dispersion, and low price

Active Publication Date: 2016-09-21
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] So far, there have been no relevant literature and patent reports on the preparation of nitrogen-doped starch-based activated carbon microspheres using gelatinization, hydrothermal, carbonization and activation processes

Method used

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  • Preparation method and application of nitrogen-doped starch-based activated carbon microsphere material
  • Preparation method and application of nitrogen-doped starch-based activated carbon microsphere material
  • Preparation method and application of nitrogen-doped starch-based activated carbon microsphere material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Take 5g of sweet potato powder, 1g of melamine, and 50ml of water in a reactor, raise the temperature to 100°C, and stir under reflux for 10h to obtain an intermediate product of nitrogen-containing colloid.

[0037] (2) Transfer the nitrogen-containing colloidal intermediate product to a high-pressure hydrothermal reaction kettle with a polytetrafluoroethylene liner with a volume filling rate of 0.5, and perform constant temperature treatment at 200° C. for 12 hours and cool to room temperature with the furnace temperature. The hydrothermal product is washed with distilled water several times and separated from solid and liquid until the washing liquid is neutral, and then the solid is placed in a drying oven at 100°C to dry to constant weight to prepare nitrogen-containing hydrothermal carbon coke.

[0038] (3) According to the mass ratio of nitrogen-containing hydrothermal carbon coke and activator potassium carbonate as 2:1, measure 2 mol / L potassium carbonate so...

Embodiment 2

[0046] (1) Take cassava flour 5g, g-C 3 N 4 Put 1.5g of powder and 50ml of water in a reactor, raise the temperature to 100°C, and stir under reflux for 10 hours to obtain an intermediate product of nitrogen-containing colloid.

[0047] (2) Transfer the nitrogen-containing colloidal intermediate product to a high-pressure hydrothermal reactor with a polytetrafluoroethylene liner of 100 ml, with a volume filling rate of 0.5, and heat it at 180° C. for 12 hours, then cool it naturally with the furnace temperature. The hydrothermal product is washed with distilled water several times and separated from solid and liquid until the washing liquid is neutral, and then the solid is dried at 110°C to constant weight to prepare nitrogen-containing hydrothermal carbon coke.

[0048] (3) Measure according to the mass ratio of nitrogen-containing hydrothermal carbon coke and activator sodium hydroxide as 1:1, measure 2 mol / L sodium hydroxide solution and nitrogen-containing hydrothermal c...

Embodiment 3

[0055] (1) Take 5g of mung bean powder and 50ml of water in a reactor, heat up to 100°C, and stir under reflux for 12h to obtain a colloidal intermediate product.

[0056] (2) Transfer the colloid product obtained in step (1) to a high-pressure hydrothermal reactor with a polytetrafluoroethylene liner of 100ml, and its volume filling rate is 0.7. Allow to cool naturally. The hydrothermal product was washed with distilled water several times and separated from solid and liquid until the washing liquid was neutral, and then the solid was dried in a drying oven at 110°C to constant weight to prepare hydrothermal carbon coke.

[0057] (3) Make the activator sodium phosphate into a solution with a concentration of 1mol / L, add the hydrothermal carbon coke prepared in step (2) according to the mass ratio of 3:1 to the activator, and then add 2.5g of polyaniline Powder with a liquid / solid ratio of 10, then mixed and stirred at room temperature for 12 hours, and then evaporated to dry...

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Abstract

The invention discloses a preparation method and application of a nitrogen-doped starch-based activated carbon microsphere material. The nitrogen-doped starch-based activated carbon microsphere material is prepared by taking starch as the carbon source and taking a nitrogen-containing compound as the nitrogen source through the steps of gelatinization, hydrothermal treatment, carbonization, activation and the like. The diameters of prepared carbon microspheres range from 0.5 micrometer to 10 micrometers, the particle size is controllable, the dispersity is good, the specific surface area ranges from 1,000 m<2> / g to 3,000 m<2> / g, and the nitrogen content ranges from 0.2% to 15%. The prepared material relates to the application fields of electrochemical energy storage, adsorption separation, catalyst carriers, drug carriers and the like and is particularly applicable to electrochemical energy storage. Green biomass is adopted as the carbon source, sources are wide, the price is low, and the preparation technology is simple, 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 starch-based activated carbon microsphere material. Background technique [0002] Carbon materials have the advantages of high chemical stability, good electrical conductivity, and low price, and are widely used in many national economic fields such as energy, chemical industry, environmental protection, medicine, electronics, and aerospace. Carbon materials with different chemical compositions, special morphology and structure have specific functions, and have become a research hotspot worldwide. [0003] Natural green biomass raw materials have the characteristics of wide sources, environmental friendliness, unique morphology and carbonaceous structure. In recent years, the research on the preparation of porous carbon-based materials from biomass raw materials has received extensive attention. Starch is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12H01G11/34
CPCY02E60/13H01G11/34C01P2004/03C01P2004/61C01P2004/62C01P2006/12C01P2006/16C01P2006/80
Inventor 刘恩辉王洛杨锃蒋海霞周杨帆
Owner XIANGTAN UNIV
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