Gas filter foam with graphene oxide and preparation method thereof

A technology of filter cotton and graphene, which is applied in the field of materials science, can solve problems such as poor results, achieve significant technological progress, improve adsorption performance, and increase specific surface area

Inactive Publication Date: 2017-03-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the above technical problems in the prior art, the invention provides a gas filter cotton containing graphene oxide and a preparation method thereof, the gas filter cotton con

Method used

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  • Gas filter foam with graphene oxide and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of graphene oxide: mix 0.5g of natural flake graphite with 50ml of concentrated sulfuric acid / concentrated phosphoric acid with a volume ratio of 9:1 in a high-pressure reactor, and slowly add 4g of high Potassium manganate, seal the reactor, heat up to 80°C and react for 3 hours, then cool to room temperature, take the product out of the reactor and dilute to 200ml, then add 10ml of hydrogen peroxide to obtain a bright yellow graphite oxide solution; then use a mass fraction greater than 5% After washing with dilute hydrochloric acid for 5 times, centrifuge and wash with deionized water until the pH of the supernatant is 5-7, ultrasonically disperse graphite oxide for 2 hours, and the ultrasonic power is 200W. Obtain graphene oxide dispersion liquid;

[0032] (2) Impregnated filter cotton: The activated carbon filter cotton is soaked in the dispersion liquid with a concentration of 0.01mg / ml, and the dispersion liquid is submerged in the synthetic fiber...

Embodiment 2

[0036] (1) prepare graphene oxide: take embodiment 1 to obtain graphene oxide dispersion;

[0037] (2) Impregnated filter cotton: The non-woven filter cotton is soaked in the dispersion liquid with a concentration of 0.1mg / ml, and the dispersion liquid is submerged in the synthetic fiber filter cotton.

[0038] (3) Freezing: The impregnated filter cotton obtained in step (2) is placed in the freezing chamber of a freeze dryer, and solidified at -50°C.

[0039] (4) Drying: vacuumize, the vacuum degree is less than 10Pa, sublimate the solvent at room temperature, and obtain graphene oxide filter cotton.

Embodiment 3

[0041] (1) prepare graphene oxide: take embodiment 1 to obtain graphene oxide dispersion;

[0042] (2) Impregnated filter cotton: soak the glass fiber filter cotton in the dispersion liquid with a concentration of 1mg / ml, and the dispersion liquid is submerged in the synthetic fiber filter cotton.

[0043] (3) Freezing: The impregnated filter cotton obtained in step (2) is placed in the freezing chamber of a freeze dryer, and solidified at -20°C;

[0044] (4) Drying: vacuumize, the vacuum degree is less than 10Pa, sublimate the solvent at room temperature, and obtain graphene oxide filter cotton.

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Abstract

The invention relates to gas filter foam with graphene oxide, composed of filter foam that contains graphene oxide. Also provided is a preparation method of the gas filter foam, comprising the steps of preparing graphene oxide solution, to be specific, preparing graphite oxide by using chemical oxidization, washing to neutrality, and ultrasonically stripping to obtain graphene oxide dispersion; soaking filter foam, to be specific, soaking filter foam in the graphene oxide dispersion which at least submerges the filter foam; freezing, to be specific, placing the filter foam in a freezing chamber of a freezing dryer so that the filter foam condenses into solid; drying, to be specific, evacuating the filter foam obtained, keeping low temperature so that a solvent sublimates to obtain the gas filter foam with graphene oxide. The filter foam of the invention is capable of oxidizing toxic gas in air and purifying the air, with specific surface area increased and adsorbing capacity improved, and is capable of adsorbing fine particulate matters in air, such as PM2.5.

Description

technical field [0001] The invention belongs to the field of materials science and relates to a filter cotton, in particular to a gas filter cotton containing graphene oxide and a preparation method thereof. Background technique [0002] Although the current trend of air pollution has been suppressed under the country's vigorous governance, some of the air in our country still poses a certain degree of threat to human health, especially the increasing number of cases of lung diseases. The scope of people's activities is mainly at home and in the workplace. Considering the maintenance of good air quality, a certain amount of air circulation is required, and the circulating air is filtered and purified, which requires the use of filter cotton. At present, pure filter cotton is mainly used in the market, which is used to prevent dust or activated carbon filter cotton to filter some harmful gases. [0003] Activated carbon filter cotton adopts aluminum honeycomb, plastic honeyc...

Claims

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Application Information

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IPC IPC(8): B01D39/02B01D39/06B01D46/00B01D53/81A62B9/06
CPCB01D39/02A62B9/06B01D39/06B01D46/0036B01D53/81B01D2239/0407B01D2239/10
Inventor 吴江胡涛孙小明周静赵丽丽官贞珍何平张进京高坤峰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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