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Production of novel carbon silica aerogel electrode and uses thereof

A carbon aerogel and aerogel technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of no fixed continuous structure, no electric adsorption electrodes, low specific surface area, etc., and achieve controllable appearance shape, high The effect of high conductivity and specific surface area

Inactive Publication Date: 2009-07-29
TONGJI UNIV
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Problems solved by technology

Existing porous carbon materials generally have low specific surface area and no fixed continuous structure, so they cannot be used as electroadsorption electrodes

Method used

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  • Production of novel carbon silica aerogel electrode and uses thereof

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Embodiment Construction

[0026] A kind of preparation method of carbon airgel electrode, comprising: (1) sol-gel phenolic polymerization method, take resorcinol, formaldehyde as raw material, sodium carbonate (or sodium hydroxide) is catalyst, under certain molar ratio Stand to obtain the phenolic resin with network structure;

[0027] (2) Prepare the mold according to the appearance size of the electrode material required by the experiment. The mold is generally made of glass. According to the thickness of the required electrode, adjust the spacing distance to obtain a phenolic resin sheet that meets the requirements. The general thickness is controlled between 5 and 10mm. .

[0028] The bulk phenolic resin obtained after standing still is replaced by solvent in acetone with low surface tension. After 5-7 days, the water molecules in the network structure are replaced by acetone, and then dried at room temperature. It takes about 5 days. ~7 days.

[0029] The dried airgel is heated to 600-1200° C. ...

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Abstract

The invention relates to preparation and application of a novel carbon aerogel electrode. The preparation adopts a synthetic routine of sol-gel-phenolic aldehyde polymerization, normal-temperature drying, high-temperature carbonization and carbon dioxide activation to prepare carbon aerogel, and uses the carbon aerogel as a working electrode in electrical adsorption technology. The prepared carbon aerogel has the advantages of high porosity, large specific surface area, high conductivity, controllable appearance and shape, and the like, and the carbon aerogel with large specific surface area is very suitable for processing environmental pollutants through electrochemical adsorption. Due to strong adsorption performance and good conductivity, the carbon aerogel has wide concentration range for removing the pollutants (between 0.1 and 100mmol / L) and has the same high-efficiency removal effect for low-concentration wastewater (of which the concentration is less than 4mmol / L) under the electrochemical strengthening function, and the removal rate can be improved by more than 3 times compared with the single adsorption function. The process has simple and convenient operation and good treatment effect on pollutant wastewater, is novel high-efficiency and energy-saving technology, and has great application value in the field of wastewater treatment.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to electrochemical adsorption technology, including preparation of electrode materials and application in electrochemical adsorption treatment of wastewater. Background technique [0002] With the continuous development of social industrialization, global environmental problems have become increasingly prominent, especially the discharge of a large amount of industrial and agricultural sewage and domestic wastewater, which has caused serious pollution of organic matter in water bodies. At present, the methods widely used in water pollution treatment include: adsorption, membrane separation, chemical treatment, biodegradation, photocatalytic oxidation and electrocatalytic oxidation. Due to the wide variety of pollutants and different treatment requirements, various technologies have their scope of application. For low-concentration pollutants, treatment methods such as electro-oxidation ...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01M4/38
Inventor 赵国华吴梅芬金宇宁胡惠康
Owner TONGJI UNIV
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