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Preparation method of graphene sponge material used for air purification

A graphene sponge and air purification technology, which is applied in the field of graphene sponge material for air purification and its preparation, can solve problems such as restacking, and achieve the effects of easy operation, low cost, good mechanical properties and processing performance

Inactive Publication Date: 2015-12-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a graphene sponge material for air purification. The graphene sponge material prepared by the technical solution provided by the invention solves the problem of re-stacking of graphene oxide during the reduction process in the traditional adsorption process. and other issues, laying the foundation for the application of graphene sponge materials in the field of air purification. The graphene sponge materials have good adsorption performance and adsorption cycle performance for purifying formaldehyde, sulfur dioxide, ammonia, nitric oxide or carbon dioxide.

Method used

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Embodiment 1

[0029] Embodiment 1 prepares graphene sponge

[0030] 1) 25kHz ultrasonic treatment of graphene oxide and carbon nanotubes to prepare a mixed aqueous solution for 40min; the mass ratio of graphene oxide and carbon nanotubes is 5:1

[0031] 2) Transfer the solution obtained in step 1) into a reaction kettle, heat it to 180° C. for 12 hours, and then cool it naturally; freeze-dry it to obtain a graphene sponge.

[0032] After testing, it was found that the adsorption capacity of this graphene sponge to formaldehyde was 205mg / g.

Embodiment 2

[0033] Embodiment 2 prepares graphene sponge

[0034] 1) 25kHz ultrasonic treatment of graphene oxide and carbon nanotubes to form a mixed aqueous solution for 30 minutes; the mass ratio of graphene oxide and carbon nanotubes is 10:1

[0035] 2) Transfer the solution obtained in step 1) into a reaction kettle, heat to 200°C for 10 hours, and then cool naturally; freeze-dry at -50°C and vacuum <10Pa for 3 days to obtain a graphene sponge.

[0036] After testing, it was found that the adsorption capacity of this graphene sponge to ammonia gas was 100mg / g.

Embodiment 3

[0037] Embodiment 3 prepares graphene sponge

[0038] 1) Ultrasonic treatment of graphene oxide and carbon nanotubes to form a mixed aqueous solution for 20 minutes; the mass ratio of graphene oxide and carbon nanotubes is 7:1

[0039] 2) Transfer the solution obtained in step 1) into a reaction kettle, heat to 190° C.) and keep the temperature for 11 hours, then cool naturally; freeze-dry to obtain a graphene sponge.

[0040] After testing, it was found that the adsorption capacity of this graphene sponge to nitric oxide was 136mg / g.

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Abstract

The invention relates to a preparation method of an adsorption material, and more specifically relates to a preparation method of a graphene sponge material used for air purification, and especially applications of the graphene sponge material in air purification. The graphene sponge material is of a three-dimensional net structure composed of graphene nanosheet and carbon nanotube. The preparation method comprises following steps: 1) a mixed aqueous solution prepared from oxidized graphene and carbon nanotube is subjected to ultrasonic treatment; and 2) an obtained solution is delivered into a reaction vessel, is heated to a constant temperature, is cooled naturally, and then is subjected to freeze drying so as to obtain the graphene sponge material. The graphene sponge material is capable of solving problems in conventional adsorption processes. Compared with the prior art, the specific surface area of the graphene sponge material is large; and adsorption performance and cycling performance are excellent.

Description

【Technical field】 [0001] The invention relates to an adsorption material and a preparation method thereof, in particular to a graphene sponge material for air purification and a preparation method thereof. 【Background technique】 [0002] Formaldehyde, sulfur dioxide, ammonia, nitric oxide and other gases are polluting gases in domestic and industrial pollution. In particular, formaldehyde in indoor air has become a major pollutant that affects human health. Formaldehyde in the air in winter is particularly harmful to the human body, and it has obvious irritating effects on eyes, nose, throat and skin. As a physical and chemical method, adsorption method is one of the important methods in air purification. It has the advantages of low cost, high removal efficiency, no secondary pollution, and easy regeneration. Among many adsorbent materials, carbon material is the most widely used adsorbent material. [0003] With its excellent mechanical, thermal and electrical properties...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 郝思嘉杨程戴圣龙张晓艳燕绍九
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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