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Preparation method for mesoporous electrode and application thereof

An electrode and mesoporous technology, applied in the field of preparation of water treatment electrode materials, can solve the problems of weak material strength, high preparation cost, and limitations, and achieve the effect of improving conductivity, improving conductivity, and realizing adsorption

Inactive Publication Date: 2012-07-18
VISBE XIAMEN ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the electrode prepared by this method has a large specific surface area, toxic and environmentally unfriendly substances (such as organic solvents and aromatic substances) need to be used in the preparation process.
In addition, its high preparation cost, weak material strength and deformation and shrinkage during carbonization all limit its development.

Method used

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  • Preparation method for mesoporous electrode and application thereof
  • Preparation method for mesoporous electrode and application thereof
  • Preparation method for mesoporous electrode and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 2 Shown in the flow chart of the preparation of the mesoporous electrode of the present invention, the specific surface area is 1500m 2 / g, activated carbon particles with an average pore size of 2nm were added with 500-mesh graphite powder during the grinding process (the mass ratio of activated carbon:graphite powder was 2:1), ground into 70-1000 mesh, passed through a 1000-mesh sieve, and washed with water at 100 Dry at -150°C for 3h. Put the pretreated activated carbon into a container, vacuumize and degas at 100-300°C for 1-2h, and then seal it, then carry out hot isostatic pressing at a temperature of 900°C and a pressure of 4000psi for 0.5- After 2 hours, cool down at a rate of 100-500°C / h, and then machine it into an electrode sheet of the desired shape. Use this example to prepare an electrode sheet image 3 Schematic diagram of the device for electro-adsorption desalination experiments.

example 2

[0034] The difference between Example 2 and Example 1 is that Example 2 adds carbon fiber (activated carbon: carbon fiber mass ratio is 2:1) in the activated carbon grinding process, and then prepares the electrode by the method of Example 1, and uses this example to prepare the electrode according to image 3 Schematic diagram of the device for electro-adsorption desalination experiments.

Embodiment 3

[0036] The difference between Example 3 and Example 1 is that in Example 3, no graphite powder or carbon fiber is added during the grinding process of activated carbon, and then the electrode is prepared by the method of Example 1. Use this example to prepare electrodes by image 3 Schematic diagram of the device for electro-adsorption desalination experiments.

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Abstract

The invention discloses a preparation method for a mesoporous electrode. The preparation method is characterized by comprising the following steps of: 1, pre-treating active carbon: grinding active carbon particles into powder with the particle size of 70 to 1,000 meshes, and then washing by using water and drying; 2, canning the active carbon: putting the pretreated active carbon powder into a container, degassing for 1 to 2 hours by vacuumizing, and then sealing the container by welding; 3, performing hot isostatic pressing treatment: performing hot isostatic pressing on the container for 0.5 to 2 hours in a hot isostatic press at a temperature of between 500 and 2,000 DEG C and a pressure of between 500 and 25,000 psi; 4, cooling the container at a speed of 100 to 500 DEG C per hour; and 5, mechanically processing a mesoporous carbon electrode which is molded by hot isostatic pressing into an electrode slice with a required shape. The mesoporous electrode is applied to equipment for electro-adsorption desalination and electrolytic water treatment.

Description

technical field [0001] The invention belongs to the field of preparation of water treatment electrode materials, in particular to a preparation method of a mesoporous electrode and its application in water treatment. Background technique [0002] Activated carbon is a kind of mesoporous carbon, which is made from organic raw materials (such as wood, coal, animal bones, asphalt, etc.) through high-temperature carbonization and activation processes. Activated carbon is an inert material with developed pore structure and large specific surface area, so it is often used as an adsorbent in decolorization, deodorization, recovery of heavy metals and removal of organic matter. According to the IUPAC classification, pore diameters less than 2 nm are micropores, pore diameters between 2 nm and 50 nm are mesopores, and pore diameters greater than 50 nm are macropores. Due to its well-developed pore structure, large specific surface area, chemical stability, and electrical conductivi...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/469
Inventor 简培超王俊川任以伟
Owner VISBE XIAMEN ENVIRONMENT TECH CO LTD
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