Biomass-based nitrogen self-doped porous carbon material and preparation method and application thereof

A self-doping, porous carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as the development limitation of carbon materials, reduce production costs, realize high-value utilization, and direct doping methods. effective effect

Inactive Publication Date: 2017-09-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the shortage of fossil energy in recent years, the development of carbon materials has been limited to some extent.

Method used

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  • Biomass-based nitrogen self-doped porous carbon material and preparation method and application thereof
  • Biomass-based nitrogen self-doped porous carbon material and preparation method and application thereof
  • Biomass-based nitrogen self-doped porous carbon material and preparation method and application thereof

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Effect test

Embodiment 1

[0037] A preparation method of a biomass-based nitrogen self-doped porous carbon material in this embodiment, the specific preparation steps are as follows:

[0038] (1) Add 3g of chitosan and 60ml of deionized water into the reactor, seal and heat to 250°C, and stir for 4 hours at a constant temperature; after the reaction, cool to room temperature, take out the solid product in the reactor, and wash it with deionized water , drying the washed product to obtain a high-temperature water-treated pre-carbonized product;

[0039] (2) Add a certain quality of KHCO into the beaker 3 , adding a small amount of water will KHCO 3 dissolved, and the pre-carbonized product was added to the beaker (KHCO 3 The mass ratio to the pre-carbonized product is 1:1) Stir evenly, and dry the mixture; then carbonize and activate the above-mentioned dried mixture in a nitrogen atmosphere, heat up from room temperature at 3°C / min to the target temperature of 750°C, and keep it warm 1 hour; after t...

Embodiment 2

[0043] A preparation method of a biomass-based nitrogen self-doped porous carbon material in this embodiment, the specific preparation steps are as follows:

[0044] (1) Add 3g of chitin and 60ml of deionized water into the reactor, seal and heat to 250°C, and stir for 4 hours at a constant temperature; after the reaction, cool to room temperature, take out the solid product in the reactor, wash it with deionized water, drying the washed product to obtain a high-temperature water-treated pre-carbonized product;

[0045] (2) Add a certain quality of KHCO into the beaker 3 , adding a small amount of water will KHCO 3 dissolved, and the pre-carbonized product was added to the beaker (KHCO 3 The mass ratio to the pre-carbonized product is 1:1) Stir evenly, and dry the mixture; then carbonize and activate the above-mentioned dried mixture in a nitrogen atmosphere, heat up from room temperature at 3°C / min to the target temperature of 750°C, and keep it warm 1 hour; after the reac...

Embodiment 3

[0048] A preparation method of a biomass-based nitrogen self-doped porous carbon material in this embodiment, the specific preparation steps are as follows:

[0049] (1) Add 3g of chitosan and 30ml of deionized water to the reactor, seal and heat to 180°C, and stir at a constant temperature for 2 hours; after the reaction, cool to room temperature, take out the solid product in the reactor, wash it with tap water, and The washed product is dried to obtain a high-temperature water-treated pre-carbonized product;

[0050] (2) Add a certain amount of NaOH in the beaker, add a small amount of water to dissolve NaOH, add the pre-carbonized product to the beaker (the mass ratio of NaOH and pre-carbonized product is 1:1) and stir evenly, and dry the mixture; then The above-mentioned dried mixture was carbonized and activated in a nitrogen atmosphere, and the temperature was raised from room temperature to the target temperature of 750 °C at a rate of 3 °C / min, and kept for 1 hour; af...

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Abstract

The invention belongs to the technical field of material science and energy chemical engineering, and discloses a biomass-based nitrogen self-doped porous carbon material and a preparation method and application thereof. The preparation method includes the steps that chitin or chitosan is treated in high-temperature water at 180-300 DEG C for 2-24 hours, and a pre-carbonized product is obtained; the pre-carbonized product is mixed evenly with an activating agent aqueous solution, then the mixture is dried and heated to 600-1000 DEG C in an inert atmosphere for carbonization and activation for 0.2-10 hours, and the carbonized product is washed with an acid solution, then washed with water to be neutral and dried to obtain the biomass-based nitrogen self-doped porous carbon material. The high-temperature water treatment is conducted on chitin or chitosan, a favorable condition is thus provided for subsequent carbonization and activation for the preparation of the porous carbon material, and the nitrogen self-doped porous carbon material is excellent in super capacitor performance and CO2 adsorption property.

Description

technical field [0001] The invention belongs to the technical field of material science and energy chemical industry, and in particular relates to a biomass-based nitrogen self-doping porous carbon material and its preparation method and application. Background technique [0002] Carbon materials have the characteristics of high chemical stability, large specific surface area, low price, good conductivity, wide range of sources, and environmental friendliness, and are widely used in adsorption, electrochemistry, sensing, and catalysis. [0003] As a new type of energy storage device, supercapacitor has the advantages of high energy density, high power density, large specific capacitance, high cycle life and good stability. application value and market potential. Carbon materials, as one of the most promising electrode materials for supercapacitors, have attracted great interest from researchers. In recent years, due to the greenhouse gas CO 2 The environmental problems ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/342
CPCC01P2004/03C01P2004/80C01P2006/12C01P2006/40
Inventor 钟林新陈泽虹彭新文
Owner SOUTH CHINA UNIV OF TECH
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