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Method for modifying porous material capable of effectively removing negative ions in air

A technology of porous materials and negative ions, applied in the field of ambient air purification, can solve problems such as electrostatic hidden dangers that cannot be fundamentally solved, and achieve the effects of safe and reliable adsorption, simple and easy-to-obtain materials, and strong operability

Inactive Publication Date: 2015-07-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the computer room of the information system has been in operation for a long time, and various electronic devices in the system will generate negative ions again during the working process. Methods such as optimizing wiring, controlling the humidity of the computer room and the concentration of dust particles in the air cannot fundamentally solve the hidden danger of static electricity from the perspective of prevention.

Method used

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  • Method for modifying porous material capable of effectively removing negative ions in air
  • Method for modifying porous material capable of effectively removing negative ions in air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Take 100gMCM-41 mesoporous molecular sieve as the porous material to be modified. After actual testing, the pore size distribution of the material is The average pore size is The inner specific surface area is 1140m 2 / g, the inner surface hydroxyl content is 0.33mequiv / g.

[0025] use figure 1 In the modification process shown, the modification of 100gMCM-41 mesoporous molecular sieve is carried out.

[0026] Add 100g of MCM-41 into the round-bottomed flask, and pass ethanol vapor at 80-100°C inside, and the reaction time is 0.5-1h. After the reaction is complete, the MCM-41 is taken out, washed with deionized water, vacuum filtered, and dried at 80° C. under vacuum or nitrogen. Place the preliminary treated MCM-41 in the flask, and add 500ml of the mixed aqueous solution of ferric chloride and cerium nitrate, wherein the concentration of cerium nitrate is 0.1mol / L, and the concentration ratio of ferric chloride and cerium nitrate is 5:1, maintain the pH in the ...

Embodiment 2

[0029] Take 100g MCM-41 mesoporous molecular sieve as the porous material to be modified. After actual testing, the pore size distribution of the material is The average pore size is The inner specific surface area is 1140m 2 / g, the inner surface hydroxyl content is 0.33mequiv / g.

[0030] Add 100g of MCM-41 into the round bottom flask, pass ethanol vapor at 80-100°C inside, and the reaction time is 0.5-1h. After the reaction is complete, the MCM-41 is taken out, washed with deionized water, vacuum filtered, and dried at 80° C. under vacuum or nitrogen. Place the preliminary treated MCM-41 in the flask, and add 500ml of the mixed aqueous solution of ferric chloride and cerium nitrate, wherein the concentration of cerium nitrate is 0.3mol / L, and the concentration ratio of ferric chloride and cerium nitrate is 5:1, maintain the pH in the reaction system at 4.5-5.5, use a water bath to react with magnetic stirring under constant temperature conditions, the reaction temperatu...

Embodiment 3

[0033] Get 100g of wood granular activated carbon as the porous material to be modified, containing 24.2% micropores, 76.0% mesopores, and an average pore diameter of The inner specific surface area is 780m 2 / g, the inner surface hydroxyl content is 0.27mequiv / g.

[0034] Add 100g of activated carbon into the round bottom flask, and pass ethanol vapor at 80-100°C inside, and the reaction time is 0.5-1h. After the reaction was completed, the activated carbon was taken out, washed with deionized water, vacuum filtered, and dried at 80° C. under vacuum or nitrogen. Place the gac through preliminary treatment in the flask, and add the mixed aqueous solution 500ml of ferric chloride and cerium nitrate configured, wherein the concentration of cerium nitrate is 0.3mol / L, and the concentration ratio of ferric chloride and cerium nitrate is 5: 1. Maintain the pH in the reaction system at 4.5-5.5, and use a water bath to stir the reaction at a constant temperature. The reaction temp...

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Abstract

The invention relates to a method for modifying a porous material capable of effectively removing negative ions in air. The porous material is subjected to chemical modification treatment by the following multiple steps: firstly, putting the to-be-modified porous adsorption material into a reaction container, and fumigating by introducing pure ethanol vapor with a certain temperature; and washing the porous material subjected to primary treatment, filtering and drying, adding into a reaction container with a mixed solution of cerous nitrate and ferric chloride, stirring at constant temperature, reacting, filtering the porous material after reacting for a certain period of time, washing by deionized water, drying, and carrying out vacuum packaging on the treated porous material for later use. Compared with the prior art, the modified material related to the porous material modifying method is simple and available; the modification method is simple, and is high in repeatability; the modified porous material is used for removing negative ions in air, has a good effect, and is safe and reliable.

Description

technical field [0001] The invention relates to a modification method of a porous material capable of effectively removing negative ions in the air, belonging to the field of ambient air purification. Background technique [0002] With the development of the information industry, the Internet and the communication industry, all walks of life in China rely more and more on electronic information systems, and the information data computer room is the core component of the information system. The harm of static electricity in the air of the data center to computer equipment is one of the most difficult hazards to eliminate in computer failures. Since a large number of electronic information devices are arranged in the computer room, when these devices are in working condition, they will generate certain static electricity and magnetic fields, resulting in a certain concentration of negative ions in the air, and these negative ions may cause great damage to computer hardware and...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/20B01J20/30B01D53/02
Inventor 徐斌吴娅张依雯
Owner TONGJI UNIV