Carbon nitride membrane composite material modified by black phosphorus/ metal organic framework, and preparation method thereof and application in waste gas treatment

a carbon nitride and composite material technology, applied in the field of functional materials, can solve the problems of difficult regeneration, air pollution, air pollution, etc., and achieve the effects of simple preparation method, easy availability of raw materials, and simple operation

Active Publication Date: 2019-12-19
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0036]1. The black phosphorus/metal organic framework (MOF) modified carbon nitride membrane composite material disclosed in the invention has simple preparation method, easy availability of raw materials, simple operation and is critical for industrial application.
[0037]2. In the black phosphorus/metal organic framework (MOF) modified carbon nitride membrane composite material disclosed by the invention, the photocatalytic degradation of nitric oxide by carbon nitride has a good effect, through the modification of the carbon nitride material, a porous carbon nitride is obtained, so it can further enhance the permeability of gas molecules and enhance the transparency of visible light; the introduction of two-dimensional black phosphorus material as a conductive material can greatly i...

Problems solved by technology

Air pollution is one of the great problems facing China at present.
Air pollution is mainly caused by outdoor and indoor pollutants.
With the continuous development and advancement of science, the current methods for treating exhaust gas include activated carbon adsorption method, catalytic combustion method, biological filtration, acid-base neutralization...

Method used

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  • Carbon nitride membrane composite material modified by black phosphorus/ metal organic framework, and preparation method thereof and application in waste gas treatment
  • Carbon nitride membrane composite material modified by black phosphorus/ metal organic framework, and preparation method thereof and application in waste gas treatment
  • Carbon nitride membrane composite material modified by black phosphorus/ metal organic framework, and preparation method thereof and application in waste gas treatment

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embodiment 1

[0048]The specific steps of preparing porous carbon nitride are as follows:

[0049]10 g of urea is placed in a porcelain crucible, and 15 mL of water is added, placed in a muffle furnace, heated to 400° C. at a heating rate of 10° C. per minute, and calcined for 1 hour. Then, the temperature is further raised to 450° C., the heating rate is 10° C. per minute, and calcination is continued for 1 hour to obtain a pale yellow porous carbon nitride nanosheet, which is ground into a powder; and FIG. 1 and FIG. 2 are the SEM and TEM images of porous carbon nitride respectively.

[0050]The preparation of porous carbon nitride modified by MOFs is as follows:

[0051]First, the porous carbon nitride nanosheet is subjected to surface carboxylation modification, and 0.05 g of porous carbon nitride and 0.6 g of succinic anhydride are dispersed to 25 mL of N, N-dimethylformamide, then stirred at room temperature for 12 hours and then washed with deionized water and ethanol for three times respectively.

[...

embodiment 2

[0057]Photocatalytic degradation of nitric oxide gas, the specific steps are as follows:

[0058]A batch reactor (2.2 liters in volume) containing one quartz glass is used for the photocatalytic degradation of nitric oxide; 50 mg of carbon nitride membrane composite material modified by black phosphorus / metal organic framework (MOF) is placed in the batch reactor, the door is closed, the reactor is evacuated, the flow rate of high purity air (1 liter) and nitric oxide (concentration of 10 ppm) is adjusted so that the flow rate of the mixed gas is 1.2 liters per minute. After the concentration of nitrogen oxide concentration stabilized at 600 ppb for fifteen minutes, a xenon light is turned on to initiate the photo degradation reaction. The carbon nitride membrane composite material modified by black phosphorus / metal organic framework (MOF) photocatalyst can be recycled many times, with good stability, after 5 times of recycling, it still have a good catalytic effect. FIG. 8 is the effe...

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Abstract

A carbon nitride membrane composite material modified by black phosphorus/metal organic framework (MOF) and a preparation method and application thereof to waste gas treatment are disclosed. First, taking urea as a raw material to calcine at a high temperature and prepare porous carbon nitride nanosheet; then carrying out surface carboxylation on the porous carbon nitride nanosheet, and modifying metal organic framework (MOF) on the surface of the porous carbon nitride through a layer-by-layer self-assembling method; stripping block black phosphorus materials into a two-dimensional black phosphorus slice by solvent exfoliation method; mixing the MOF-modified porous carbon nitride material with the two-dimensional black phosphorus material, carrying out suction filtration on the mixture under a vacuum pump to obtain the black phosphorus/MOF-modified carbon nitride membrane composite material.

Description

FIELD OF THE INVENTION[0001]The present invention belongs to the technical field of functional materials, and particularly relates to carbon nitride membrane composite material modified by black phosphorus / metal organic framework (MOF), its preparation method and its application in waste gas photocatalytic treatment.TECHNICAL BACKGROUND[0002]Air pollution is one of the great problems facing China at present. With the development of Chinese economy, photochemical smog, smog and PM 2.5 (PM is a particulate matter) are becoming more and more serious, which has caused huge influences on daily life and physical health. Air pollution is mainly caused by outdoor and indoor pollutants. Outdoor gas pollutants include respirable particulate matter, nitrogen oxides, sulfur dioxide and carbon monoxide, while indoor air pollutants mainly include formaldehyde, toluene and hydrocarbons. At present, with the rapid increase in the number of automobiles in China, the emission of automobile exhausts h...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01D53/86B01J31/22B01J35/06B01J37/08
CPCB01D2255/802B01J27/24B01J35/0033B01J35/004B01D53/8628B01J37/082B01J35/065B01J31/2213B01J35/10B01D2255/702B01D2255/707B01D2257/404B01J23/72B01J27/14B01J31/1616B01J31/1691B01J31/2239B01J37/0209B01J2531/16
Inventor LU, JIANMEICHEN, DONGYUN
Owner SUZHOU UNIV
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