Preparation method of carbon aerogel for air filtration

A carbon aerogel and air filtration technology, which is applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve the problems of air purification without systematic literature reports, etc., and achieves a simple and convenient preparation process, low energy consumption, and improved air The effect of purification rate

Inactive Publication Date: 2016-06-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of carbon aerogels in capacitors, water pollution treatment, etc. has attracted much attention. Due to the characteristics of porous structure, carbon aerogels have been used to treat water pollution and have made major breakthroughs in this field, while in air purification (especially is fine particulate matter treatment) there is no systematic literature report

Method used

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  • Preparation method of carbon aerogel for air filtration
  • Preparation method of carbon aerogel for air filtration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of carbon airgel:

[0027] A. Firstly separate the pulp, seeds and the outer skin of the grapefruit, then cut off the yellow skin of the outer skin of the grapefruit to obtain white soft grapefruit peels, and finally cut the white soft grapefruit peels into pieces shape;

[0028] B, soak the sliced ​​pomelo peel in 0.02M ascorbic acid, 0.02M glucose, 0.02M potassium hydroxide, 0.02M potassium chloride and 0.02M ferric chloride solution respectively, soaking for 2 hours each time;

[0029] C. Put the soaked grapefruit peel in a stainless steel autoclave made of polytetrafluoroethylene material for hydrothermal carbonization, that is: put the sealed stainless steel autoclave in a constant temperature drying box, and put the grapefruit peel in water at 60 ° C. Heat for 6 hours, then take it out to get a black carbon hydrogel;

[0030] D. Soak the black carbon hydrogel in absolute ethanol to remove impurities, and take it out after 24 hours;

[0031...

Embodiment 2

[0035] Preparation of carbon airgel:

[0036] A. Firstly separate the pulp, seeds and the outer skin of the grapefruit, then cut off the yellow skin of the outer skin of the grapefruit to obtain white soft grapefruit peels, and finally cut the white soft grapefruit peels into pieces shape;

[0037] B, soak the sliced ​​pomelo peel in 0.4M ascorbic acid, 0.4M glucose, 0.4M potassium hydroxide, 0.4M potassium chloride and 0.4M ferric chloride solution respectively, soaking for 5 hours each time;

[0038] C. Put the soaked pomelo peel in a stainless steel autoclave made of polytetrafluoroethylene material for hydrothermal carbonization, that is: put the sealed stainless steel autoclave in a constant temperature drying box, and put the grapefruit peel in water at 200 ° C. Heat for 12 hours, then take it out to get a black carbon hydrogel;

[0039] D. Soak the black carbon hydrogel in absolute ethanol to remove impurities, and take it out after 48 hours;

[0040] E. ...

Embodiment 3

[0044] Preparation of carbon airgel:

[0045] A. Firstly separate the pulp, seeds and the outer skin of the grapefruit, then cut off the yellow skin of the outer skin of the grapefruit to obtain white soft grapefruit peels, and finally cut the white soft grapefruit peels into pieces shape;

[0046] B, soak the sliced ​​pomelo peel in 2M ascorbic acid, 2M glucose, 2M potassium hydroxide, 2M potassium chloride and 2M ferric chloride solution respectively, soaking for 10 hours each time;

[0047] C. Put the soaked grapefruit peel in a stainless steel autoclave made of polytetrafluoroethylene material for hydrothermal carbonization, that is: put the sealed stainless steel autoclave in a constant temperature drying box, and put the grapefruit peel in water at 120 ° C. Heat for 24 hours, then take it out to get a black carbon hydrogel;

[0048] D. Soak the black carbon hydrogel in absolute ethanol to remove impurities, and take it out after 36 hours;

[0049] E. Soak ...

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Abstract

The invention discloses a preparation method of a carbon aerogel for air filtration. The preparation method comprises the following steps: by using natural fresh pomelo peel as the raw material, carrying out hydrothermal-process carbonization, removing impurities with anhydrous ethanol, removing the anhydrous ethanol with deionized water, prefreezing, carrying out freeze-drying and the like, thereby preparing the carbon aerogel. The pyrolysis process is simple, and has the advantages of low energy consumption, simple steps and easy operation; the carbon aerogel has favorable adsorption capacity for formaldehyde, PM2.5 and other air contaminants, obviously enhances the air purification rate, and greatly lowers the injury of the air contaminants to the human body; the preparation method of the carbon aerogel is different from that of the traditional aerogel and commercial activated carbon, and the preparation process is simple and convenient; the preparation method is different from that of the traditional aerogel and commercial activated carbon, and is convenient, healthy and environment-friendly. The method can use tangerine peel, watermelons, white gourds, cucumbers, towel gourds, jackfruits, sugar cane, potatoes, taro and other biomass materials as the raw material of the carbon aerogel.

Description

technical field [0001] The invention relates to the field of biological materials, in particular to a method for preparing carbon airgel used for air filtration. Background technique [0002] An estimated 1.6 million people die each year in China from air pollution, accounting for 17% of China's total deaths. The Global Burden of Disease 2010 Report estimated that in 2010, outdoor PM2.5 pollution caused 1.2 million premature deaths in China. The report also stated that PM2.5 is the fourth largest risk factor affecting public health in China, the top three being unhealthy diet, high blood pressure and smoking. In the "Lancet" report, it is estimated that the number of premature deaths caused by outdoor air pollution in China is 350,000 to 500,000 people every year. The study found that China's annual average PM2.5 is 52μg / m3. Overall, 38% of Chinese people breathe "unhealthy" air (>55μg / m3). In addition, for NO2 and SO2 emissions, 15%~25% comes from traffic exhaust, 30...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J20/20B01J20/30B01J20/28B01D53/02B01D49/00
CPCB01J20/20B01D49/00B01D53/02B01D2253/102B01D2257/70B01D2258/06B01J20/28047C01P2004/03
Inventor 王小磊辛洪波董丽娜刘春镯余芬史晓彤刘苗星
Owner NANCHANG UNIV
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