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Preparation method of carbon nanotube air purifying agent for removing formaldehyde

A carbon nanotube and purifying agent technology, applied in the field of carbon nanotube air purifying agent preparation, can solve the problems of inability to eliminate odorous substances, high price, unsatisfactory effect, etc., and achieve full exposure, eliminate free formaldehyde, The effect of improving the catalytic conversion rate

Inactive Publication Date: 2019-03-15
梅玉杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The suction filtration method requires large-scale mechanical equipment, and it is difficult to implement the covering method in the living room, compartment, toilet and other environments. The method is to spray aromatic substances to cover up the peculiar smell, but it cannot eliminate the harm to the human body caused by the peculiar smell substances. The oxidation method is to use the principle of electrolysis to generate negative oxygen ions. The air is disinfected and purified, but the effect is not ideal, and the price is high. From the perspective of the thoroughness and advantages and disadvantages of formaldehyde elimination, catalytic oxidation technology is the most direct and effective way to eliminate formaldehyde

Method used

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  • Preparation method of carbon nanotube air purifying agent for removing formaldehyde

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1 Add 0.05 kg of single-walled carbon nanotube solids and potassium permanganate solids in a ratio of 1:4 to excess concentrated sulfuric acid solution, and place the resulting reaction mixture in a water bath at 50°C under constant temperature magnetic Stir with a stirrer for 1h;

[0021] Step 2 After diluting the above-mentioned reacted mixed solution with deionized water, add excess hydrogen peroxide solution and stir for 20 minutes;

[0022] Step 3 After the above-mentioned reacted mixed solution is filtered with a microporous membrane and washed with dilute hydrochloric acid solution, the obtained solid is then washed with deionized water by high-speed centrifugation until the supernatant is neutral (PH=7);

[0023] Step 4 Then take the solid in the lower layer and add deionized water to fully stir, and after further centrifugation and washing, take the uniform and stable solution in the upper layer to obtain solution A;

[0024] Step 5 Ultrasonically dispers...

Embodiment 2

[0034] Step 1 Add 0.05 kg of single-walled carbon nanotube solids and potassium permanganate solids in a ratio of 1:2 to excess concentrated sulfuric acid solution, and place the resulting reaction mixture in a water bath at 50°C under constant temperature magnetic Stir with a stirrer for 1h;

[0035] Step 2 After diluting the above-mentioned reacted mixed solution with deionized water, add excess hydrogen peroxide solution and stir for 20 minutes;

[0036] Step 3 After the above-mentioned reacted mixed solution is filtered with a microporous membrane and washed with dilute hydrochloric acid solution, the obtained solid is then washed with deionized water by high-speed centrifugation until the supernatant is neutral (PH=7);

[0037] Step 4 Then take the solid in the lower layer and add deionized water to fully stir, and after further centrifugation and washing, take the uniform and stable solution in the upper layer to obtain solution A;

[0038] Step 5 Ultrasonically dispers...

Embodiment 3

[0048] Step 1 Add 0.05 kg of single-walled carbon nanotube solids and potassium permanganate solids in a ratio of 1:1 to excess concentrated sulfuric acid solution, and place the resulting reaction mixture in a water bath at 50°C under constant temperature magnetic Stir with a stirrer for 1h;

[0049] Step 2 After diluting the above-mentioned reacted mixed solution with deionized water, add excess hydrogen peroxide solution and stir for 20 minutes;

[0050] Step 3 After the above-mentioned reacted mixed solution is filtered with a microporous membrane and washed with dilute hydrochloric acid solution, the obtained solid is then washed with deionized water by high-speed centrifugation until the supernatant is neutral (PH=7);

[0051] Step 4 Then take the solid in the lower layer and add deionized water to fully stir, and after further centrifugation and washing, take the uniform and stable solution in the upper layer to obtain solution A;

[0052] Step 5 Ultrasonically dispers...

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Abstract

The invention discloses a preparation method of a carbon nanotube air purifying agent for removing formaldehyde. The preparation method comprises the following steps: taking carbon nanotubes, potassium permanganate, hydrogen peroxide, silica microspheres, PDDA, PSS, rare-earth nitrate, sodium tungstate, nickel nitrate and ferric nitrate as raw materials, carrying out double modification on silicaand then performing coprecipitation modification with metal salt to prepare the formaldehyde purifying agent, the carbon nanotube air purifying agent comprises the following main raw materials in ratios: the mass ratio of carbon nanotube solid to potassium permanganate solid is 1: 4, the molar ratio of PDDA to PSS is 1: 2, the molar ratio of rare-earth nitrate to sodium tungstate is 3: 1, and themass ratio of nickel nitrate to ferric nitrate is 1: 1. According to the invention, the double modification and modification are carried out on the carbon nanotubes, to obtain the formaldehyde purifying agent, and the formaldehyde purifying agent is high in catalytic activity, long in catalyst life, good in stability, easy to obtain the preparation materials, low in cost and easy to recycle and further can be reused.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube air purifier for removing formaldehyde, which belongs to the technical field of environmental protection. Background technique [0002] Under normal temperature and pressure, formaldehyde is a colorless gas with pungent odor, and it is flammable. When the concentration is high, it is easy to form an explosive mixture with air, and it is a systemic poison, which will reduce the body temperature. The antioxidant capacity of various organs, which leads to oxidative damage to organs, and the higher the concentration, the more serious the damage; indoor air pollution mainly comes from furniture, building sources, fabric wood fillers, cosmetics, detergents and personal products, etc. The formaldehyde purification methods used at home and abroad mainly include air suction filtration, covering method, oxidation method and so on. The suction filtration method requires large-scale mechanical equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J21/18B01J37/03B01J37/34B01D53/86B01D53/72
CPCB01D53/8668B01D2257/708B01J21/185B01J31/06B01J37/03B01J37/343
Inventor 梅玉杰
Owner 梅玉杰
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