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High-electric-conductivity phenolic-resin-based graphene-modified activated carbon, and preparation method and application thereof

A graphene modification and activated carbon technology, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems that the performance of activated carbon cannot meet the capacity, the pore size distribution is unreasonable, and the internal resistance of activated carbon is large. Migrating channels, reducing adverse effects, improving conductivity

Pending Publication Date: 2019-10-11
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the performance of activated carbon prepared by the method currently used is still very insufficient, which is manifested in: the prepared activated carbon is mainly composed of micropores, and the pore size distribution is unreasonable; the performance of the prepared activated carbon still cannot meet the capacity requirements; the prepared activated carbon High internal resistance
In the existing literature, the use of phenolic resin to prepare porous activated carbon (phenolic resin-based activated carbon) has been reported, but there are still problems such as small specific surface area, low mesoporosity and low conductivity.

Method used

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  • High-electric-conductivity phenolic-resin-based graphene-modified activated carbon, and preparation method and application thereof
  • High-electric-conductivity phenolic-resin-based graphene-modified activated carbon, and preparation method and application thereof

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preparation example Construction

[0049] The invention provides a kind of preparation method of resin-based graphene modified activated carbon, comprising the following steps:

[0050] A) After the phenolic compound, the aldehyde compound and the graphene oxide undergo a hydrothermal reaction, a compound is obtained;

[0051] B) Under the condition of a protective atmosphere, after carbonizing the compound obtained in the above steps, a carbonized material is obtained;

[0052] C) after mixing the carbonized material obtained in the above steps with an activator, after activation under the condition of a protective atmosphere, the primary product of activated carbon is obtained;

[0053] D) The activated carbon primary product obtained in the above steps is subjected to heat treatment under the protection of reducing gas and / or protective atmosphere to obtain resin-based graphene-modified activated carbon.

[0054] In the present invention, firstly, the compound is obtained through hydrothermal reaction of ph...

Embodiment 1

[0092] Take 37.6g of phenol, 97.4g of formaldehyde (37% aqueous solution), and 92ml of graphene oxide aqueous solution with a concentration of 8‰, add them to a 200ml hydrothermal kettle, and react at 180°C for 16h. After the reaction finishes, take out the resin / graphene (graphene oxide) composite.

[0093] Vacuum drying at 120° C. for 24 hours to remove excess water to obtain a dried resin / graphene (graphene oxide) block, which was crushed to 25-30 μm.

[0094] The composite was added into a nitrogen-protected tube furnace, and carbonized at 500°C for 3 hours to obtain a carbonized product. The carbonized product is ground into a powder of 10-12 μm.

[0095] Take 30g of carbide and 120g of potassium hydroxide powder and mix them evenly, add them into a pure nickel crucible, heat up to 800°C at a rate of 5°C / min under nitrogen protection for 1h, cool down naturally, wash until neutral, and use 3% 60 It was acid-washed with HCl at ℃ for 2 hours, washed with water again until...

Embodiment 2

[0104] Take 18.8g of phenol, 48.7g of formaldehyde (37% aqueous solution), and 92ml of graphene oxide aqueous solution with a concentration of 8‰, add them to a 200ml hydrothermal kettle, and react at 180°C for 12h. After the reaction finishes, take out the resin / graphene (graphene oxide) composite.

[0105] Vacuum drying at 120° C. for 24 hours to remove excess water to obtain a dried resin / graphene (graphene oxide) block, which was pulverized to a size of 26-28 μm.

[0106] The composite was added to a nitrogen-protected tube furnace and carbonized at 550°C for 2 hours to obtain a carbonized product. The carbonized product is ground into a powder of 8-10 μm.

[0107] Take 30g of carbide and 150g of potassium hydroxide powder and mix them evenly, add them into a pure nickel crucible, heat up to 900°C at a rate of 5°C / min under nitrogen protection for 1h, cool down naturally, wash until neutral, and use 3% 60 It was acid-washed with HCl at ℃ for 2 hours, washed with water ag...

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Abstract

The invention provides a preparation method of resin-based graphene-modified activated carbon. The preparation method includes the following steps: hydrothermally reacting a phenolic compound with analdehyde compound and graphene oxide to obtain a composite; in a protective atmosphere, carbonizing the composite obtained by the previous step to obtain a carbonized material; mixing the carbonized material obtained in the previous step with an activator, and then activating the mixture in a protective atmosphere to obtain a primary activated carbon product; subjecting the primary activated carbon product obtained in the previous step to heat treatment under the protection of a reducing gas and / or a protective atmosphere to obtain the resin-based graphene-modified activated carbon. The preparation method has the advantages that raw materials, including the phenolic compound, the aldehyde compound and the graphene oxide, are subjected to hydrothermal synthesis to achieve uniform dispersionof graphene in resin, so that catalysts, initiators and curing agents are reduced, the performance of the composite is ensured, and the problem of difficulty in dispersion of the graphene in the resin is solved.

Description

technical field [0001] The invention belongs to the technical field of activated carbon materials, and relates to a resin-based graphene-modified activated carbon and its preparation method and application, in particular to a highly conductive phenolic resin-based graphene-modified activated carbon and its preparation method and application. Background technique [0002] Phenolic resin is a polymer produced by polycondensation reaction of phenolic compounds and aldehyde compounds under the catalysis of acid or alkali catalysts. The most common one is the resin obtained by condensation of phenol or its homologues (such as cresol, xylenol, etc.) and formaldehyde. According to the type and ratio of raw materials used and the type of catalyst, it can be divided into two types of thermoplastic and thermosetting resins. Thermoplastic phenolic resin is a linear resin that only melts when heated, but cannot become insoluble or infusible. However, it can be transformed into thermose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/348
Inventor 姜彤彤赵永彬马立军殷玉强张在忠
Owner SHANDONG OBO NEW MATERIAL CO LTD
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