Graphene-based air filter material and preparation method thereof

A graphene-based, graphene-based technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of inability to filter adsorption materials, three-dimensional graphene has no flexibility, easy to break and deform, etc., and achieve enhanced adsorption effect , good mechanical properties and processing performance, low cost effect

Inactive Publication Date: 2016-01-20
杜茂龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Three-dimensional graphene can be prepared in a variety of ways, but the three-dimensional graphene produced by the current method does not have good flexibility, is easy to break and deform, and cannot be effectively used as a filter adsorption material

Method used

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  • Graphene-based air filter material and preparation method thereof
  • Graphene-based air filter material and preparation method thereof
  • Graphene-based air filter material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0030] The embodiment of the present invention prepares the technological process of three-dimensional graphene, comprises the following steps:

[0031] The first step is to prepare graphene oxide: the average particle size of graphite powder in this example is 5000 mesh. Graphene oxide (GO) was synthesized by the Hummers method. 2g graphite powder, 1gNaNO 3 Mix well with 230ml concentrated sulfuric acid in an ice-water bath, slowly add 6gKMnO 4 . Then the temperature was raised to 35°C, and after stirring for 30 minutes, 92ml of deionized water was added, and the temperature was raised to 98°C for 15 minutes to react. After that, add 280ml of water to it to dilute and wash with 5ml of 30% H 2 o 2 Neutralize excess KMnO 4 . The color of the mixed solution was brownish yellow, filtered while hot, washed repeatedly with deionized water until neutral, and dispersed by ultrasonic to obtain GO.

[0032] The second step is to synthesize three-dimensional graphene: take 200ml...

Embodiment 2

[0037] The embodiment of the present invention prepares the technological process of three-dimensional graphene, comprises the following steps:

[0038] The first step is to prepare graphene oxide: the average particle size of graphite powder in this example is 10000 mesh. The synthesis steps are the same as in Example 1.

[0039] The second step is to synthesize three-dimensional graphene: take 200ml of graphene oxide solution with a mass fraction of 5mg / ml and pour it into a disc-shaped reaction vessel with a diameter of 25cm and a height of 2cm, add 0.5g of sodium polyacrylate and stir to make it fully mixed, and then Add 100ml of toilet paper pulp. Stir to combine and then freeze into chunks. The graphene sponge was then subjected to vacuum freeze-drying to obtain a flexible three-dimensional graphene structure.

[0040]In summary, the three-dimensional sponge-like graphene structure has a pore size ranging from 100 nm to 1 μm and a specific surface area of ​​about 800 ...

Embodiment 3

[0043] The embodiment of the present invention prepares the technological process of three-dimensional graphene, comprises the following steps:

[0044] The first step is to prepare graphene oxide: the average particle size of graphite powder in this example is 500 mesh. The synthesis steps are the same as in Example 1.

[0045] The second step is to synthesize three-dimensional graphene: take 200ml of graphene oxide solution with a mass fraction of 5mg / ml and pour it into a disc-shaped reaction vessel with a diameter of 25cm and a height of 2cm, add 0.5g of polyethylene glycol and stir to make it fully mixed, Then 100ml of mechanical pulp was added. Stir to combine and then freeze into chunks. The graphene sponge was then subjected to vacuum freeze-drying to obtain a flexible three-dimensional graphene structure.

[0046] In summary, the three-dimensional sponge-like graphene structure has a pore size ranging from 100 nm to 1 μm and a specific surface area of ​​about 200 m...

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Abstract

The invention relates to a graphene-based air filter material and a preparation method thereof, and the material is of a three-dimensional graphene sponge structure assembled by oxidized graphene. The method and application comprise the steps that (1) a thickening agent is added to an oxidized graphene aqueous solution, and pulp is added as a crosslinking agent, so as to obtain porous spongy three-dimensional graphene by using a freeze-drying method; (2) the porous spongy graphene has good mechanical strength and can be freely bent and cut into different shapes; (3) the hole structure of the spongy graphene can be regulated and controlled by changing the size of the oxidized graphene and the quantity of the added crosslinking agent; (4) the porous spongy graphene has a high specific surface area and more surface functional groups and has a strong adsorption effect and certain antibacterial properties. The graphene adsorption material has the advantages of simple preparation process and low cost, the hole size of the spongy graphene can be regulated and controlled, and the graphene adsorption material can be used as the filter material for mask filter discs, filter nets of air conditioners, automobile filters and the like and can be applied to the fields of dye and oil adsorption and the like.

Description

technical field [0001] The invention relates to the field of adsorption materials, in particular to a graphene adsorption material and its preparation method and application, which can be used for air filter materials such as mask filters, air conditioner filter screens, and automobile filters, and has certain antibacterial properties. Background technique [0002] At present, the problem of air pollution in our country is becoming more and more serious, mainly manifested as soot pollution. The concentration of total suspended particulate matter in the urban atmospheric environment generally exceeds the standard; sulfur dioxide pollution has been at a relatively high level; the total amount of motor vehicle exhaust pollutants has increased rapidly; nitrogen oxide pollution has shown an aggravating trend. Especially recently, the smog weather frequently produced in many large and medium-sized cities in China has seriously threatened the health and lives of the people. The me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
Inventor 杜茂龙
Owner 杜茂龙
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