Activated carbon-graphene composite and formaldehyde adsorption testing method

A composite material and a technology for absorbing formaldehyde, applied in the field of composite material preparation, can solve the problems of graphene crystal quality decline, graphene low purity, easy to wrinkle or fold, etc., and achieve low cost, simple preparation method, and low dosage Effect

Inactive Publication Date: 2018-11-20
智环(厦门)科技有限公司
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Problems solved by technology

Disadvantages: The lower growth temperature and faster growth rate will cause the quality of graphene crystals to decline. At the same time, in order to prevent oxidation, the equipment needs to maintain ultra-high vacuum at high temperature, which brings great difficulty to the design and manufacture of the equipment.
However, the prepared graphene has a low purity, and the prepared graphene sheet has a large number of structural defects, is prone to wrinkles or folds, and contains many oxygen-containing groups, which affects the excellent properties of graphene and cannot meet the needs of some application fields. Such as optoelectronic devices, hydrogen storage materials, etc.

Method used

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Embodiment

[0020] A preparation method of activated carbon-graphene composite material: disperse 0.2g graphene oxide in 100mL water, add 20g activated carbon, stir for 2h, slowly add 0.2g / 20mL NaBH 4 The solution was then refluxed at 100° C. for 4 h and filtered to obtain an activated carbon-graphene material.

[0021] Activated carbon-graphene composite materials test the method of adsorbing formaldehyde, air flow method: control the concentration of formaldehyde to 200ppm, press the material into tablets and sieve, get 0.3g material of 50-70 mesh, put it in a quartz tube, and pass the formaldehyde into the quartz In the tube, through gas chromatography test, the formaldehyde concentration after absorption equilibrium is 179ppm. (Simple activated carbon, the concentration of formaldehyde after absorption balance is 193ppm).

[0022] Closed method, in a closed 0.125m 3 (0.5m×0.5m×0.5m) space, control the concentration of formaldehyde to 200ppm, put 5g (5cm×5cm) of sheet-shaped material...

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Abstract

The invention discloses an activated carbon-graphene composite and a formaldehyde adsorption testing method and particularly belongs to the technical field of preparation of composites. The specific preparation method comprises the steps as follows: a graphene oxide material is dispersed in water, activated carbon is added, the mixture is stirred for 2-3 h to be fully mixed, a NaBH4 solution is slowly and dropwise added, then, reflux is performed at 80-120 DEG C for 3-5 h, filtration is performed, and the activated carbon-graphene composite is obtained. The preparation method of the activatedcarbon-graphene composite is simple, the types of required reaction reagents are fewer, the dosage of the required reaction reagents is smaller, and the cost is lower. The prepared activated carbon-graphene composite has a formaldehyde adsorption function and lays a foundation for further study of graphene.

Description

technical field [0001] The invention relates to an activated carbon-graphene composite material and a method for testing and adsorbing formaldehyde, specifically in the technical field of composite material preparation. Background technique [0002] Since Graphene was prepared by mechanical exfoliation in 2004 and its unique physical properties were revealed, scientists in the fields of physics, chemistry, materials, electronics and engineering all over the world have invested great research interest in it. Research initiators Andre Geim and Konstantin Novoselov also won the 2010 Nobel Prize in Physics for their pioneering work. [0003] Now the properties of graphene have been studied in depth, and it shows a wide range of application prospects: it can not only replace many current materials, improve performance and reduce manufacturing costs, such as silicon in the semiconductor field; it can also be used with Other materials are compounded, thereby improving their proper...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/30B01J20/20B01J20/30B01D53/02
CPCC01B32/184B01D53/02B01D2257/70B01J20/20C01B32/30
Inventor 黄锦铮
Owner 智环(厦门)科技有限公司
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