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Composite nano material for degrading VOC gas and preparation method thereof

A composite nanomaterial and gas technology, which is applied in the field of composite nanomaterials for degrading VOC gas and its preparation, can solve the problems of secondary pollution, long degradation time, large differences in the degradation efficiency of harmful gases, etc. , the effect of improving the photocatalytic performance

Inactive Publication Date: 2020-06-26
俞春亚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, activated carbon adsorption is commonly used to remove VOC. However, the adsorption capacity of activated carbon is limited, and it needs to be disposed of in time after the adsorption is saturated, otherwise the harmful substances adsorbed by it will be released again, causing secondary pollution.
Moreover, the adsorption of activated carbon on low-concentration VOC gases is even more limited.
[0007] Patent application CN1772353A discloses a photocatalytic application of four-needle zinc oxide whiskers to degrade indoor organic pollutants. Four-needle zinc oxide whiskers are used as photocatalytic materials to efficiently degrade various harmful gases in the room under ultraviolet light irradiation. , but its degradation efficiency for various harmful gases is quite different, especially with the help of combination with activated carbon, noble metal salts, etc., the degradation efficiency is only 10% at the lowest and 99.6% at the highest
Moreover, the degradation time is also longer, basically more than 2.5 hours

Method used

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  • Composite nano material for degrading VOC gas and preparation method thereof

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Effect test

Embodiment 1

[0034] A preparation method of a composite nanomaterial for degrading VOC gas, the specific steps are as follows:

[0035] (1) Using multi-walled carbon nanotubes as raw materials, boron and phosphorus are co-doped to obtain doped multi-walled carbon nanotubes;

[0036] (2) Then modify the doped multi-walled carbon nanotubes with methyltris(cyclohexylamino)silane to obtain modified doped multi-walled carbon nanotubes;

[0037] (3) Then compound the modified doped multi-walled carbon nanotubes with bismuth tungstate to obtain a complex;

[0038] (4) Finally, the complex is reacted with p-aminobenzaldehyde and isoniazid, and modified with polyethyleneimine to obtain the composite nanomaterial for degrading VOC gas.

[0039] The specific method of step (1) is: first acidify 10mol of multi-walled carbon nanotubes, and then ultrasonically disperse them in water to obtain a dispersion; then add 0.1mol of boric acid and 0.6mol of pyrophosphoric acid into the dispersion, in an inert ...

Embodiment 2

[0047] A preparation method of a composite nanomaterial for degrading VOC gas, the specific steps are as follows:

[0048] (1) Using multi-walled carbon nanotubes as raw materials, boron and phosphorus are co-doped to obtain doped multi-walled carbon nanotubes;

[0049] (2) Then modify the doped multi-walled carbon nanotubes with methyltris(cyclohexylamino)silane to obtain modified doped multi-walled carbon nanotubes;

[0050] (3) Then compound the modified doped multi-walled carbon nanotubes with bismuth tungstate to obtain a complex;

[0051] (4) Finally, the complex is reacted with p-aminobenzaldehyde and isoniazid, and modified with polyethyleneimine to obtain the composite nanomaterial for degrading VOC gas.

[0052] The specific method of step (1) is: first acidify 10mol of multi-walled carbon nanotubes, and then ultrasonically disperse them in water to obtain a dispersion; then add 0.2mol of boric acid and 0.5mol of pyrophosphoric acid into the dispersion, and inert at...

Embodiment 3

[0060] A preparation method of a composite nanomaterial for degrading VOC gas, the specific steps are as follows:

[0061] (1) Using multi-walled carbon nanotubes as raw materials, boron and phosphorus are co-doped to obtain doped multi-walled carbon nanotubes;

[0062] (2) Then modify the doped multi-walled carbon nanotubes with methyltris(cyclohexylamino)silane to obtain modified doped multi-walled carbon nanotubes;

[0063] (3) Then compound the modified doped multi-walled carbon nanotubes with bismuth tungstate to obtain a complex;

[0064] (4) Finally, the complex is reacted with p-aminobenzaldehyde and isoniazid, and modified with polyethyleneimine to obtain the composite nanomaterial for degrading VOC gas.

[0065] The specific method of step (1) is: first acidify 10mol of multi-walled carbon nanotubes, and then ultrasonically disperse them in water to obtain a dispersion; then add 0.15mol of boric acid and 0.55mol of pyrophosphoric acid into the dispersion, in an iner...

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Abstract

The invention provides a composite nano material for degrading VOC (volatile organic compound) gas and a preparation method of the composite nano material. The preparation method comprises the following steps: taking a multi-walled carbon nanotube as a raw material, and carrying out boron and phosphorus co-doping to obtain a doped multi-walled carbon nanotube; then carrying out modification treatment on the doped multi-walled carbon nanotube by utilizing tris(cyclohexylamino)methylsilane to obtain a modified doped multi-walled carbon nanotube; then compounding the modified doped multi-walled carbon nanotube with bismuth tungstate to obtain a complex; and finally, reacting the complex with p-aminobenzaldehyde and isoniazid, and using polyethyleneimine for modification treatment to obtain acomposite nano material. Catalytic degradation of volatile organic compounds can be achieved under the action of visible light, and the high degradation rate can be achieved for low-concentration VOCgas in a short time.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a composite nanomaterial for degrading VOC gas and a preparation method thereof. Background technique [0002] VOC is the English abbreviation of Volatile Organic Compounds (VOC), which refers to various organic compounds with a saturated vapor pressure greater than 70Pa and a boiling point of 50-260°C at room temperature, or a vapor pressure greater than or equal to 10Pa at 20°C All organic compounds with corresponding volatility. [0003] VOCs are organic (carbon-based) gases emitted by many different products, also known as hydrocarbons. Evaporation of VOCs is caused by sufficient pressure. Common indoor sources of VOCs include building materials, carpets, printers, furniture, paint thinners, glues, cosmetics and certain sprays, and plastics. [0004] According to the Environmental Protection Agency, indoor air pollution can be up to 10 times more polluted ...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10B01D53/72B01D53/86
CPCB01J31/1805B01D53/8668B01J2531/54B01J35/61B01J35/39
Inventor 俞春亚曹宇航
Owner 俞春亚
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