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Composite nano material for air purification and preparation method of composite nano material

A composite nanomaterial and air purification technology, which is applied in the field of composite nanomaterials for air purification, can solve the problems of expensive catalysts and achieve good adsorption selectivity, rich pore structure and surface functional group properties, and excellent surface properties.

Inactive Publication Date: 2017-05-10
江苏中千碧华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high Pt content (12wt%) of the catalyst makes the catalyst expensive

Method used

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  • Composite nano material for air purification and preparation method of composite nano material

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Embodiment 1

[0024] A composite nanomaterial for air purification, the composite nanomaterial consists of 45wt% graphene oxide, 45wt% carbon nanoparticles, 8wt% nano TiO 2 And 2wt% nano-silver particles composition, the carbon nanoparticles, nano-TiO 2 And nano-silver particles are supported on the surface of graphene oxide nano-sheets, the thickness of the nano-sheets is 4-8nm, the particle size of the silver nanoparticles is 20-30nm, and the specific surface area of ​​the material is 760m 2 / g, the pore volume is 0.37cm 3 / g;

[0025] Wherein, the preparation method of described composite nanomaterial comprises the following steps:

[0026] (1) Preparation of graphene oxide: Disperse 0.042g of graphite powder into 20mL of concentrated sulfuric acid in an ice bath at 0°C, and add KMnO 4 , the added KMnO 4 The mass of graphite powder is 3 times that of graphite powder, stir for 50 minutes, the temperature rises to 32 ℃, add 45ml of deionized water, stir for 25 minutes, add 10ml of 30% ...

Embodiment 2

[0030] A composite nanomaterial for air purification, the composite nanomaterial consists of 50wt% graphene oxide, 40wt% carbon nanoparticles, 7wt% nano TiO 2 And 3wt% nano-silver particles composition, the carbon nanoparticles, nano-TiO 2 And nano-silver particles are supported on the surface of graphene oxide nano-sheets, the thickness of the nano-sheets is 6-10nm, the particle size of silver nanoparticles is 30-40nm, and the specific surface area of ​​the material is 820m 2 / g, the pore volume is 0.45cm 3 / g;

[0031] Wherein, the preparation method of described composite nanomaterial comprises the following steps:

[0032] (1) Preparation of graphene oxide: Disperse 0.060g of graphite powder into 25mL of concentrated sulfuric acid in an ice bath at 0°C, and add KMnO 4 , the added KMnO 4 The mass is 4 times that of graphite powder, stir for 60 minutes, the temperature rises to 35°C, add 50ml of deionized water, stir for 30 minutes, add 15ml of 30% H 2 o 2 , stirred fo...

Embodiment 3

[0036] A composite nanomaterial for air purification, the composite nanomaterial consists of 38wt% graphene oxide, 50wt% carbon nanoparticles, 10wt% nano TiO 2 And 2wt% nano-silver particles composition, the carbon nanoparticles, nano-TiO 2 And nano-silver particles are supported on the surface of graphene oxide nano-sheets, the thickness of the nano-sheets is 5-10nm, the particle size of the silver nanoparticles is 25-45nm, and the specific surface area of ​​the material is 860m 2 / g, the pore volume is 0.46cm 3 / g;

[0037] Wherein, the preparation method of described composite nanomaterial comprises the following steps:

[0038] (1) Preparation of graphene oxide: Disperse 0.36g of graphite powder into 20mL of concentrated sulfuric acid in an ice bath at 0°C, and add KMnO 4 , the added KMnO 4 The mass of graphite powder is 3 times that of graphite powder, stir for 60 minutes, the temperature rises to 30 ° C, add 40ml of deionized water, stir for 26 minutes, add 10ml of H...

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Abstract

The invention provides a composite nano material for air purification. The composite nano material is prepared from graphene oxide accounting for 15 to 55 weight percent of the composite material, carbon nanoparticle accounting for 30 to 50 weight percent of the composite material, nano TiO2 accounting for 5 to 10 weight percent of the composite material and nano silver particles accounting for 1 to 3 weight percent of the composite material; the carbon nanoparticle, the nano TiO2 and the nano silver particles are supported on the surface of a graphene oxide nanosheet; the thickness of the nanosheet is 4 to 12nm, the particle size of the nano silver particles is 20 to 50nm, the specific surface area of the material is 700 to 900m<2> / g, and the pore volume is 0.3 to 0.5cm<3> / g. According to the composite nano material provided by the invention, by using a nano-size effect generated by a nano interlamellar structure and the sizes of the nanoparticles, an air purifying material has the functions of adsorption, oxidation purification and sterilization; the graphene oxide and the carbon nanoparticles are combined to enrich the porous structure of the material and the properties of surface functional groups; the composite nano material also embodies good adsorptive selectivity to formaldehyde and other organic pollutants such as benzene, methylbenzene and ammonia.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial application, and in particular relates to a composite nanomaterial used for air purification. Background technique [0002] The study of nanomaterials is a frontier field in today's scientific research, and it is also a hot spot studied by many scientists all over the world. The magic and unknown aspects of nanomaterials have aroused people's widespread attention; the research and application of nanomaterials are currently hot spots and difficulties, and are also the focus of high-tech development. [0003] Formaldehyde is a major indoor air pollutant, and its harm has received widespread attention. In the "Indoor Air Quality Standard" (GB / T18883-2002) promulgated by China in 2002, the hygienic standard (maximum allowable concentration) of formaldehyde in indoor air is 0.10mg / m3 respectively. 3 . Therefore, it is of great significance to remove formaldehyde in indoor air. Purification met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01D53/86C01B32/184C01B32/15B82Y30/00B82Y40/00
CPCB01D53/02B01D53/86B01J20/20B01J20/28007B82Y30/00B82Y40/00
Inventor 不公告发明人
Owner 江苏中千碧华新材料有限公司
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