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Doping method and application of green bristlegrass-based bio-based carbon material

A bio-based carbon and foxtail technology, which is applied in the preparation/purification of carbon, non-aqueous electrolyte battery electrodes, electrical components, etc., can solve the problems of inaccurate heating program control, low doping rate, and high reaction temperature, and achieve reaction Effects of shortened time, high doping rate, and low reaction temperature

Inactive Publication Date: 2020-11-17
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technologies all use heat treatment to make doped porous carbon materials, but the process is relatively complicated, the reaction temperature is high, the heating program is not controlled precisely, and the doping rate is not high

Method used

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  • Doping method and application of green bristlegrass-based bio-based carbon material
  • Doping method and application of green bristlegrass-based bio-based carbon material
  • Doping method and application of green bristlegrass-based bio-based carbon material

Examples

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Effect test

Embodiment 1

[0061] The preparation method of Setaria bio-based fluorine microwave doped carbon material powder comprises the following preparation method:

[0062] (1) dry the foxtail bio-based carbon material in an oven to remove moisture;

[0063] (2) Put the dried foxtail bio-based carbon material and 40% hydrofluoric acid into the microwave reactor and stir, and feed inert gas N 2 , microwaved at 120°C for 7 hours to obtain a solution of Setaria bio-based fluorine microwave-doped carbon material;

[0064] (3) vacuum filtration is used to clean the solvent in the Setaria bio-based fluorine microwave-doped carbon material solution with deionized water to obtain the Setaria bio-based fluorine microwave-doped carbon material slurry;

[0065] (4) freeze-drying the bio-based fluorine microwave-doped carbon material slurry of Setaria chinensis to obtain the bio-based fluorine microwave-doped carbon material powder of Setaria chinensis.

[0066] Scanning electron microscopy of the Setaria b...

Embodiment 2

[0077] The preparation method of Setaria bio-based nitrogen microwave doped carbon material powder comprises the following preparation method:

[0078] (1) dry the foxtail bio-based carbon material in an oven to remove moisture;

[0079] (2) After mixing the dried foxtail bio-based carbon material and urea at a mass ratio of 4:1, put them into a microwave reactor and stir, pass in an inert gas, and microwave at 120°C for 7 hours to obtain the green foxtail bio-based Nitrogen microwave doped carbon material solution;

[0080] (3) vacuum filtration is used to clean the solvent in the Setaria bio-based nitrogen microwave-doped carbon material solution with deionized water to obtain the Setaria bio-based nitrogen microwave-doped carbon material slurry;

[0081] (4) freeze-drying the bio-based nitrogen microwave-doped carbon material slurry of Setaria chinensis to obtain the bio-nitrogen microwave-doped carbon material powder of Setaria chinensis.

[0082] The yield of the Setari...

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Abstract

The invention belongs to the technical field of bio-based carbon materials, and particularly relates to a doping method of a green bristlegrass-based bio-based carbon material, which comprises: carbonizing green bristlegrass for 3-10 h at a temperature of 200-1000 DEG C in an inert gas atmosphere to obtain a green bristlegrass carbon material; grinding the green bristlegrass carbon material and anactivating agent to obtain a mixture, and reacting the mixture with the activating agent for 3-10 hours at the temperature of 200-1000 DEG C under the protection of inert gas to obtain the green bristlegrass bio-based carbon material; mixing the green bristlegrass bio-based carbon material, a doping compound and a solvent, and carrying out microwave reaction for 3-8 hours at 60-240 DEG C in an inert gas atmosphere to obtain a green bristlegrass bio-based microwave doped carbon material. The doping method based on the green bristlegrass bio-based carbon material is low in reaction temperature,high in doping rate, simple in process, high in yield and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of bio-based carbon materials, in particular to a method for doping bio-based carbon materials based on foxtail grass and its application. Background technique [0002] Biomass carbon materials have good mechanical properties, but some carbon materials have no energy band gap, their conductivity cannot be completely controlled like traditional semiconductors, and the surface is inert, which is not conducive to recombination with other materials. Therefore, the existing The technology often changes the main carrier into electron type or hole type by doping, and then opens the band gap of the biomass carbon material, improves the conductivity, stability, surface chemical activity and energy density of the carbon material, and makes the biomass carbon material The application of materials is diversified. [0003] Patent CN107680832A discloses a method for preparing a nitrogen-doped carbon material, which inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01G11/24H01G11/44H01M4/13H01M4/139H01M4/62H01M10/052
CPCC01B32/05H01G11/24H01G11/44H01M4/625H01M4/139H01M4/13H01M10/052Y02E60/10
Inventor 杨宇彭粤海杨卓鸿楚状状
Owner SOUTH CHINA AGRI UNIV
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