Preparation method and application of graphitized carbon with large specific surface area

A large specific surface area, graphitized carbon technology, applied in chemical instruments and methods, graphene, separation methods, etc., can solve problems such as high raw material costs, and achieve a wide range, low surface oxygen content, and rich oxygen-containing functional groups Effect

Active Publication Date: 2020-10-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can configure potassium hydroxide and catalyst precursor into a mixed solution and then impregnate the surface of the carbon source precursor in one step, it needs to use additional reagents such as ammonia or ethylenediamine, or use expensive ferrate, etc., resulting in high raw material cost

Method used

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  • Preparation method and application of graphitized carbon with large specific surface area
  • Preparation method and application of graphitized carbon with large specific surface area
  • Preparation method and application of graphitized carbon with large specific surface area

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Dissolve 2 grams of ferric trichloride hexahydrate in 20 ml of water, add 3 grams of activated carbon powder, evaporate the water while stirring, raise the temperature to 150 ° C, keep it for 10 minutes, and cool down to obtain activated carbon loaded with iron. Dissolve 6 grams of potassium hydroxide in 20 milliliters of water, add the above-mentioned activated carbon loaded with iron, evaporate the water while stirring, raise the temperature to 900 ° C in nitrogen, and keep the temperature for 2 hours. After cooling down, put the obtained solid in the Washing in pure water, then soaking in hydrochloric acid solution, finally washing with water until the washing liquid is close to neutral, filtering and drying the solid product to obtain a graphitized carbon product, the BET specific surface area is 1646 square meters per gram, X-ray diffraction The figure shows that it has a graphitized structure (as attached figure 1 Shown), X-ray photoelectron spectroscopy showed th...

Embodiment 2

[0050] Dissolve 3 grams of ferric nitrate nonahydrate in 15 milliliters of water, dissolve 1.2 grams of sodium hydroxide in 15 milliliters of water, mix the two to obtain ferric hydroxide precipitate, centrifuge or filter to separate, and add to fresh hydroxide containing bound water Add 1.35 g of acetic acid to the iron, stir until a sol is formed, add water to dilute to 20 ml, and obtain a hydrated iron oxide colloidal solution. Add 3 grams of activated carbon powder to the above colloidal solution, evaporate the water while stirring, raise the temperature to 180° C., keep it for 10 minutes, and cool down to obtain activated carbon loaded with iron. Dissolve 6 grams of potassium hydroxide in 20 milliliters of water, add the above-mentioned activated carbon loaded with iron, evaporate the water while stirring, raise the temperature to 900 ° C in nitrogen, and keep the temperature for 2 hours. After cooling down, put the obtained solid in the Washing in pure water, then soakin...

Embodiment 3

[0053] Dissolve 2.2 g of cobalt nitrate hexahydrate in 20 ml of water, add 3 g of activated carbon powder, evaporate the water while stirring, raise the temperature to 300 ° C in nitrogen, keep it for 10 minutes, and cool down to obtain activated carbon loaded with cobalt. Dissolve 6 grams of potassium hydroxide in 20 milliliters of water, add the above-mentioned activated carbon loaded with cobalt, evaporate the water while stirring, raise the temperature to 900 ° C in nitrogen, and keep the temperature for 2 hours. After cooling down, put the obtained solid in the Washing in pure water, then soaking in hydrochloric acid solution, finally washing with water until the washing liquid is close to neutral, filtering and drying the solid product to obtain a graphitized carbon product, the BET specific surface area is 1617 square meters per gram, X-ray diffraction The figure shows that it has a graphitized structure (as attached image 3 shown).

[0054] If 2.2 grams of cobalt nit...

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Abstract

The invention provides a preparation method and an application of graphitized carbon with a large specific surface area. The preparation method comprises the following steps: loading a metal catalyston a carbon source precursor; and then loading potassium hydroxide, isolating air and raising the temperature for treatment, or putting the carbon source precursor loaded with the metal catalyst intoan atmosphere containing water vapor or carbon dioxide, raising the temperature for treatment, cooling the product, washing the product with acid and water, removing impurities such as silicon, the metal catalyst and alkali, and drying the product to obtain graphitized carbon with a large specific surface area. According to the preparation method, cheap and easily available metal salt is used as acatalyst precursor, and in the catalytic graphitization process, due to the existence of pore-forming agents such as potassium hydroxide, water vapor or carbon dioxide, graphitized carbon with a large specific surface area can be obtained. The graphitized carbon has strong hydrophobicity and strong affinity to organic matters, and can be used for efficiently adsorbing and removing organic pollutants and heavy metals in waste gas or wastewater, and meanwhile, the derivative graphene oxide can be used for efficiently adsorbing and removing heavy metals in water.

Description

technical field [0001] The invention belongs to the field of carbon material preparation technology and application, and in particular relates to a preparation method and application of graphitized carbon with a large specific surface area. Background technique [0002] Porous graphitized carbon is a new type of material that has emerged in recent years. Compared with activated carbon, porous graphitized carbon has better conductivity and stronger hydrophobicity; compared with graphite, it has a porous structure. The special properties make porous graphitized carbons have good application prospects in many emerging and traditional fields. For example, its graphitized skeleton is conducive to the transmission of electrons, and its pore structure is conducive to the transmission of ions, so it is an excellent electrode material for supercapacitors, batteries, sensors and other equipment or devices. Its hydrophobicity makes its surface have a strong affinity for organic matte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205C01B32/198C01B32/19B01J20/20B01J20/28B01J20/30B01D53/02C02F1/28C02F101/20C02F101/30
CPCC01B32/205C01B32/198C01B32/19B01J20/20B01J20/28066B01D53/02C02F1/283B01D2257/708C02F2101/20C02F2101/30Y02A50/20
Inventor 李进军蔡敏娟吴峰陈涛
Owner WUHAN UNIV
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