Carbon aerogel for electric adsorption electrode and preparation method for carbon aerogel

A carbon airgel and electro-adsorption technology, applied in the direction of chemical instruments and methods, colloid chemistry, colloid chemistry, etc., can solve the problem of restricting the industrialization development and promotion of carbon aerogels, hindering the industrialization development of carbon aerogels, It is not conducive to the promotion and application of carbon aerogels, and achieves the effects of facilitating industrial development and popularization and application, promoting industrial development, and large pore volume and pore diameter.

Active Publication Date: 2014-04-16
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the relatively mature carbon airgel preparation method is the invention of Pekala et al., but this preparation method has to go through a long and complicated preparation cycle. The supercritical drying preparation technology increases the production cost and restricts the industrial development and application of carbon aerogels
Some domestic scholars also used the traditional supercritical drying process at the beginning of their research, which required hig

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  • Carbon aerogel for electric adsorption electrode and preparation method for carbon aerogel

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Embodiment 1

[0029] (1) Preparation of organic wet gel: mixing resorcinol and phloroglucinol with a molar ratio of 8:1, and then mixing the mixture of quinone and phloroglucinol with formaldehyde in a ratio of 1 according to the amount of substance :2 mixed, add deionized water and be mixed with the reaction liquid that mass fraction is 35%, then add the nickel acetate that the mol ratio with resorcinol and phloroglucinol mixture is 2000:1 and solute quality 0.3% , the reaction solution was mixed evenly by ultrasonic wave and then sealed, placed in a constant temperature water bath, and fully reacted at 50°C for 3 days to prepare nickel-loaded resorcinol-phloroglucinol-formaldehyde wet gel.

[0030] (2) Solvent replacement: The nickel-loaded resorcinol-phloroglucinol-formaldehyde wet gel prepared in step (1) was soaked in acetone solution for solvent replacement, and the acetone was replaced every 24 hours. Once, the water and other impurities in the wet gel are completely replaced.

[00...

Embodiment 2

[0035] (1) Preparation of organic wet gel: mixing resorcinol and phloroglucinol with a molar ratio of 5:1, and then

[0036] The mixture of hydroquinone and phloroglucinol is mixed with formaldehyde according to the ratio of the amount of substances of 1:2, and deionized water is added to prepare a reaction solution with a mass fraction of 45%, and then added with resorcinol and phloroglucinol Phenol is mixed with sodium carbonate with a molar ratio of 1000:1 and nickel acetate with a solute mass of 0.4%, and the reaction solution is mixed evenly by ultrasonic waves, sealed, placed in a constant temperature water bath, and fully reacted at 50°C for 3 days to obtain a loaded Resorcinol-phloroglucinol-formaldehyde wet gel of nickel.

[0037] (2) Solvent replacement: The nickel-loaded resorcinol-phloroglucinol-formaldehyde wet gel prepared in step (1) was soaked in acetone solution for solvent replacement, and the acetone was replaced every 24 hours. Once, the water and other im...

Embodiment 3

[0042] (1) Preparation of organic wet gel: mixing resorcinol and phloroglucinol with a molar ratio of 6:1, and then

[0043] The mixture of hydroquinone and phloroglucinol is mixed with formaldehyde according to the ratio of the amount of substances of 1:2, and deionized water is added to prepare a reaction solution with a mass fraction of 40%, and then added with resorcinol and phloroglucinol Phenol mixed with sodium carbonate with a molar ratio of 1500:1 and nickel acetate with a solute mass of 0.5%, mixed the reaction solution evenly with ultrasonic waves, sealed it, and placed it in a constant temperature water bath, and fully reacted at 50°C for 3 days to obtain a loaded Resorcinol-phloroglucinol-formaldehyde wet gel of nickel.

[0044] (2) Solvent replacement: soak the nickel-loaded resorcinol-phloroglucinol-formaldehyde wet gel prepared in step (1) in an acetone solution for solvent replacement, and replace the acetone every 24 hours, during which time 4 Once, the wate...

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Abstract

The invention provides a preparation method for carbon aerogel for an electric adsorption electrode. The metal nickel modified carbon aerogel is prepared by performing sol-gel reaction, normal-pressure drying and high-temperature carbonization on resorcinol, phloroglucinol, nickel acetate and formaldehyde which serve as raw materials and sodium carbonate serving as a catalyst. According to the preparation method, the reaction speed is properly adjusted by adjusting the content of the phloroglucino in the raw materials; by virtue of solvent replacement, organic aerosol is prepared under normal-temperature and normal-pressure conditions. The method provided by the invention is used for preparing the nickel-loading carbon aerogel, so that the specific surface area of the carbon aerogel is large, the pore volume and the aperture are large, and the resistivity is low; the carbon aerogel can be widely applied in the fields of treatment of a supercapacitor electrode and organic wastewater, removal of negative and positive ions, heavy metal ions and radioactive isotopes and the like. The preparation method provided by the invention is simple in preparation process and convenient and easy to operate and is short in production period; requirement on equipment is low, and industrialization development and popularization application are facilitated.

Description

technical field [0001] The invention relates to a carbon airgel and a preparation method thereof, in particular to a preparation method of a carbon airgel used for an electric adsorption desalination electrode. Background technique [0002] Carbon airgel is an emerging nanoporous amorphous carbon material with controllable structure, which is an ideal electrode material due to its abundant voids, continuous network structure, high specific surface area, and good electrical conductivity. It can be used to manufacture electric double-layer capacitors, and can also be used in water treatment fields such as removing anions and cations, heavy metal ions, radioactive isotopes and some organic wastes in water, and has a good application prospect. In 1989, Pekala et al. used resorcinol as raw material for the first time to polymerize formaldehyde with sol-gel process, supercritical drying and high-temperature carbonization to prepare carbon aerogels. A lot of research has been done...

Claims

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Application Information

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IPC IPC(8): B01J13/00
Inventor 闫美芳刘振法张利辉何蕊刘璇
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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