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N, S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal and preparation method thereof

A mesoporous structure and nano-sheet technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems that have not been reported, and achieve the effect of low technical difficulty, good chemical properties, and stable structure

Inactive Publication Date: 2020-02-07
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bagasse is subjected to high-temperature, high-pressure solvent heat treatment and carbonization activation treatment to obtain biochar with nanosheet-like mesoporous structure, and then directly carbonized with dopants at high temperature to obtain N, S co-doped bagasse nanosheet-like mesoporous structure. The method of biochar material has not been reported yet

Method used

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  • N, S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal and preparation method thereof
  • N, S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal and preparation method thereof
  • N, S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Weigh 10 g of bagasse, wash it with tap water to remove surface impurities, then wash it twice with deionized water, put it into a constant temperature blast drying oven at 80° C., and dry it at a constant temperature to obtain washed and dried bagasse.

[0022] (2) the bagasse of 3g step (1) gained is put into the liner of the polytetrafluoroethylene reactor of 100mL, add 60mL concentration and be the potassium hydroxide solution of 2.5mol / L, after putting on the steel shell and tightening, Put it into a constant temperature oven, heat it at a constant temperature of 160°C for 14 hours, and then take it out after cooling naturally. Pour off the brown liquid in the inner pot, take out the solid matter in the inner pot, wash the solid matter with deionized water until it is neutral, and put it in Dry in a constant temperature blast drying oven at 60°C to obtain a dry gray flocculent precursor.

[0023] (3) Add 100 mL of deionized water to the mixture of the gray floc...

Embodiment 2

[0028] (1) Weigh 10 g of bagasse, wash it with tap water to remove surface impurities, wash it twice with deionized water, put it into a constant temperature blast drying oven at 80° C., and dry it at a constant temperature to obtain washed and dried bagasse.

[0029] (2) the bagasse of 3g step (1) gained is put into the liner of the polytetrafluoroethylene reactor of 100mL, add 60mL concentration and be the potassium hydroxide solution of 2.5mol / L, after putting on the steel shell and tightening, Put it into a constant temperature oven, heat it at 160°C for 14 hours, and then take it out after cooling naturally. Pour off the brown liquid in the inner pot, take out the solid matter in the inner pot, wash the solid matter with deionized water until it is neutral, and put it in Dry in a constant temperature blast drying oven at 60°C to obtain a dry gray flocculent precursor.

[0030] (3) Add 100 mL of deionized water to the mixture of the gray flocculent precursor obtained in st...

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Abstract

The invention discloses N, S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal and a preparation method thereof. The appearance of the biomass charcoal is of a sheet-shaped porous structure, the thickness of each sheet is 5-50 nm, the pore diameter of each sheet is 6-20 nm, the surface of each sheet is similar to a honeycomb, a large number of nanosheets with mesoporous structures are stacked together, and the crystal form structure of the biomass charcoal is an amorphous charcoal structure. The preparation method is as follows: removing impurities on the surface of bagasse and drying; adding a potassium hydroxide solution, carrying out hydrothermal treatment to obtain a gray flocculent precursor, carrying out carbonization treatment under the protection of nitrogen to obtain bagasse nanosheet-shaped mesoporous structure biomass charcoal, grinding and mixing the bagasse nanosheet-shaped mesoporous structure biomass charcoal serving as a substrate and thiourea serving as a doping agent, and carrying out doping treatment under nitrogen to obtain the N and S co-doped bagasse nanosheet-shaped mesoporous structure biomass charcoal. The method is simple in step, lowin raw material cost, low in technical difficulty, economical and environmentally friendly, and the obtained product is stable in structure, is an amorphous crystal structure material, and has a goodapplication prospect in the fields of environmental remediation, soil improvement, energy storage and shielding / wave-absorbing materials.

Description

technical field [0001] The invention relates to an N, S co-doped bagasse nanosheet mesoporous structure biochar and a preparation method thereof, and relates to the technical field of element-doped biochar material manufacturing. Background technique [0002] Biochar is the most abundant carbon source on earth, and it has good application prospects in the fields of soil improvement, environmental restoration and energy storage. At present, there have been many reports on the preparation of element-doped bio-carbon materials, including the doping of heteroelements into the carbon lattice by direct pyrolysis (Fangcai Zheng, Dong Liu, Guoliang Xia, et al. Biomass waste inspired nitrogen -doped porous carbon materials as high-performance anode for lithium-ion batteries[J].Journal of Alloys and Compounds,2017,693.), there is also pyrolysis activation of biomass and dopants by pyrolysis activation method to obtain element Doped biochar (Adeela Rehman, Soo-Jin Park. Tunable nitrog...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324C01B32/354
CPCC01B32/324C01B32/348C01B32/354
Inventor 覃爱苗郑爽胡国彬刘慧根廖雷
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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