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Sisal fiber-based nitrogen and sulfur co-doped graphene-like carbon material and preparation method thereof

A technology of sisal fiber and graphene carbon is applied in the directions of graphene, chemical instruments and methods, nano carbon, etc., and achieves the effects of low cost of raw materials, good application prospects and simple operation steps.

Active Publication Date: 2020-07-31
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using sisal fiber as a carbon source, the sisal fiber is first subjected to high-temperature and high-pressure solvent heat treatment to obtain a flocculent precursor, and then the precursor is subjected to carbonization and activation treatment, and finally thiourea is used as a sulfur source and nitrogen source for high-temperature calcination. The method of preparing nitrogen and sulfur co-doped sisal fiber-based graphene has not been reported yet

Method used

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  • Sisal fiber-based nitrogen and sulfur co-doped graphene-like carbon material and preparation method thereof
  • Sisal fiber-based nitrogen and sulfur co-doped graphene-like carbon material and preparation method thereof
  • Sisal fiber-based nitrogen and sulfur co-doped graphene-like carbon material and preparation method thereof

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Embodiment 1

[0023] (1) Weigh 15g of sisal fiber and wash it with tap water to remove the impurities on the surface, then wash it twice with deionized water, put it in a constant temperature blast drying box and dry at a constant temperature at 80°C for 4 hours to obtain washed and dried sisal fiber.

[0024] (2) Cut the sisal fiber obtained in step (1) into 20~30mm sections with scissors, weigh 3g into the PTFE liner of a 100mL hydrothermal reactor, and add 70mL to a concentration of 1.5mol / L Put the potassium hydroxide solution on the steel shell and tighten it, put it in a constant temperature oven, heat it at 160°C for 14 hours and cool it out naturally, pour out the brown liquid in the liner, and take out the solid material in the liner. After the solid matter was washed to neutrality with deionized water, it was placed in a constant temperature blast oven for drying treatment at a constant temperature of 60° C. for 12 hours to obtain a dry white flocculent precursor.

[0025] (3) Weigh 4...

Embodiment 2

[0031] (1) Weigh 15g of sisal fiber and wash it with tap water to remove the impurities on the surface, then wash it twice with deionized water, put it in a constant temperature blast drying box and dry at a constant temperature at 80°C for 4 hours to obtain washed and dried sisal fiber.

[0032] (2) Cut the sisal fiber obtained in step (1) into 20~30mm sections with scissors, weigh 5g into the PTFE liner of a 100mL hydrothermal reactor, and add 70mL to a concentration of 2.5mol / L Put the potassium hydroxide solution on the steel shell and tighten it, put it in a constant temperature oven, heat it at 160°C for 14 hours and cool it out naturally, pour out the brown liquid in the liner, and take out the solid material in the liner. After washing the solid matter to neutrality with deionized water, it was put into a constant temperature blast oven for drying treatment at a constant temperature of 60° C. for 12 hours to obtain a dry white flocculent precursor.

[0033] (3) Weigh 7.5 g...

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Abstract

The invention discloses a sisal fiber-based nitrogen and sulphur co-doping graphene carbon material and a preparation method thereof. The material has the gross feature of black solid powder, and has the microscopic structure feature of carbon nanometer sheets; the sheet thickness is 2 to 6 nanometers; nitrogen and sulphur elements are doped. Sisal fiber is washed by water, is dried, and is put into a high-temperature and high-pressure reaction kettle; a strong alkaline solution is poured into the high-temperature and high-pressure reaction kettle; solvent heat treatment is performed; after the natural cooling, the materials are washed to a neutral state by deionized water; drying is performed to obtain white flocculated precursors; after the precursors are soaked by a strong alkaline solution and is dried, the carbonization activation treatment is performed under the nitrogen gas protection; after the acid pickling and drying, immersion is performed by a thiourea solution; drying is performed; under the nitrogen gas protection, high-temperature sintering is performed. The sisal fiber-based nitrogen and sulphur co-doping graphene carbon material and the preparation method have the advantages that the operation is simple; the cost is low; the scaled production can be realized; the obtained sisal fiber-based nitrogen and sulphur co-doping graphene carbon material has the nanometer sheet-shaped structures and the stable physical chemical properties; good application prospects are realized in the fields of microelectronic devices, sensors, energy storage equipment and the like.

Description

Technical field [0001] The invention relates to a sisal fiber-based nitrogen and sulfur co-doped graphene-like carbon material and a preparation method thereof, and relates to the technical field of bio-based graphene-like carbon nanomaterial manufacturing. Background technique [0002] Bio-based graphene-like carbon material refers to a carbon material with nano-sheet structure obtained by using biomass as a carbon source and undergoing high-temperature carbonization and activation treatment under the protection of an inert atmosphere. This graphene-like carbon material has a large Its specific surface area, high degree of graphitization, and good electrical conductivity have excellent application prospects in the fields of microelectronic devices, sensors, energy storage equipment, etc. There have been many reports on the preparation of bio-based graphene-like carbon materials. Fu Honggang of Heilongjiang University and others used straw as a carbon source to prepare three-dime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194C01B32/184
CPCC01P2002/70C01P2002/82C01P2004/04
Inventor 覃爱苗刘远洲李宇龙炳德罗严德陈子勇牛振铃张改革
Owner GUILIN UNIVERSITY OF TECHNOLOGY