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Carbide doped porous carbon and preparation method thereof

A porous carbon and carbide technology, applied in the field of porous carbon materials, can solve the problems of removal, pore shrinkage, and specific surface area reduction, and achieve the effects of improving conductivity, reducing bonding ability, and increasing specific surface area

Active Publication Date: 2018-01-12
程杰
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these doping studies, elements such as nitrogen, oxygen, phosphorus, and boron occupy the position of carbon atoms in the carbon material, and it is also difficult to improve the electrical conductivity of the resulting carbon, which is still basically equivalent to activated carbon, and even the electrical conductivity of the carbon material becomes lower.
[0007] The preparation method of the above-mentioned porous carbon has no obvious effect on improving the conductivity of the porous carbon material
Nowadays, there are many ways to improve the conductivity of activated carbon by combining high-temperature treatment, but high-temperature treatment will lead to a decrease in specific surface area, removal of doping elements such as nitrogen, oxygen, phosphorus, and boron, and also lead to overall shrinkage of pores, making it difficult to balance specific surface area and conductivity while increasing the

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  • Carbide doped porous carbon and preparation method thereof
  • Carbide doped porous carbon and preparation method thereof
  • Carbide doped porous carbon and preparation method thereof

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preparation example Construction

[0057] For the carbide-doped porous carbon in which metal carbides are embedded in the porous carbon, the present invention provides a method for preparing the carbide-doped porous carbon described in the above technical solution, comprising the following steps:

[0058] (1) adding water to a mixed solution including an organic carbon source, an organic metal salt, a curing agent and an organic solvent for hydrolysis to obtain a hydrolyzed compound;

[0059] (2) surface oxidation is performed after the hydrolyzed complex obtained in the step (1) is solidified to obtain a composite oxidation product;

[0060] (3) subjecting the composite oxidation product obtained in step (2) to pressure treatment to obtain a preform;

[0061] (4) Carbonizing the preform obtained in step (3) to obtain carbide-doped porous carbon.

[0062] In the invention, water is added to a mixed solution including organic carbon source, organic metal salt, curing agent and organic solvent, and hydrolyzed to...

Embodiment 1

[0128] ① Mix phenolic resin, titanium ethoxide, hexamethylenetetramine and ethanol at a weight ratio of 100:3:5:100 at 25°C and fully stir and dissolve to obtain a mixed solution;

[0129] ②Keep at 25°C, add water dropwise to the mixed solution at a rate of 1.7mL / min and continue to stir for 0.5h until the titanium ethoxide is completely hydrolyzed to obtain a hydrolyzed complex. 50%;

[0130] ③ The hydrolyzed compound was heated and vacuum-evaporated at 80°C under continuous stirring to obtain a solidified material for 12 hours;

[0131] ④ After pulverizing the solidified material, heat and oxidize it in a fluidized bed at 180°C for 0.5h to obtain the oxidized material, wherein the particle size of the pulverized solidified material is controlled at D50 of 80 μm;

[0132] ⑤ Press the oxide material into a sheet with a thickness of 0.5mm and a diameter of 10mm under a pressure of 50MPa;

[0133] ⑥Put the preform into the carbonization reaction chamber, raise the temperature ...

Embodiment 2

[0144] ① Mix phenolic resin, titanium ethoxide, hexamethylenetetramine and ethanol at a weight ratio of 100:40:20:1000 at 0°C and fully stir to dissolve to obtain a mixed solution;

[0145] ②Heat the above solution to 70°C, then add water dropwise to the mixed solution at a rate of 1.7mL / min and continue to stir for 5h until the titanium ethoxide is completely hydrolyzed to obtain a hydrolyzed complex. Add about 500mL of water as a solvent 50% of the mass of ethanol;

[0146] ③ The hydrolyzed compound was heated at 100°C under vacuum evaporation and solidified under continuous stirring to obtain a solidified material for 12 hours;

[0147] ④ After pulverizing the solidified material, heat and oxidize it in a fluidized bed at 260°C for 0.5h to obtain a composite oxidation product, wherein the particle size of the pulverized solidified material is controlled at D50 of 80 μm;

[0148] ⑤ Compress the composite oxidation product into a sheet with a thickness of 0.2 mm and a diamet...

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Abstract

The invention provides a carbide doped porous carbon and a preparation method thereof. The carbide doped porous carbon is prepared from porous carbon and a metal carbide embedded into the porous carbon. The obtained carbide doped porous carbon has the advantages that the void of the porous carbon is mostly centralized in micropores and mesopores, so that the specific surface area of the porous carbon is favorably improved; the metal carbide is positioned inside the porous carbon; the intrinsic conductivity of the porous carbon is improved; the condition that the conductivity of the porous carbon is reduced while the specific surface area is increased is avoided. The embodiment result shows that the carbide doped porous carbon provided by the invention has the specific surface area reaching400 to 1700m<2> / g; compared with a porous carbon material obtained by a traditional method, the carbide doped porous carbon has the advantages that under the condition with the equivalent specific surface area, the conductivity is obviously improved; the defect that the specific surface area is improved by using the conductivity reduction as the cost is avoided.

Description

technical field [0001] The invention relates to the technical field of porous carbon materials, in particular to a carbide-doped porous carbon and a preparation method thereof. Background technique [0002] Porous carbon materials refer to carbon materials with different pore structures, and the pore size has a wide range. Porous carbon materials are widely used as adsorption materials in water purification, gas separation, solvent recovery, decolorization and other fields due to their developed pores, high specific surface area, high pore volume, and the pore size can be adjusted within a certain range. It can also be used in catalyst supports, lithium-ion batteries, and electrode materials for supercapacitors. [0003] At present, the preparation methods of porous carbon materials mainly include activation method and template method. [0004] The activation method refers to the use of gas media or chemical reagents to activate raw materials to form pores. Ordinary activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/318C01B32/336
Inventor 程杰
Owner 程杰
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