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Spherical porous adsorbent based on carbon nanotubes as well as preparation method and application of spherical porous adsorbent

A Porous Adsorbent, Carbon Nanotube Technology

Inactive Publication Date: 2017-05-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon nanotubes are not easy to recycle after being used to adsorb wastewater pollutants, and the loss is relatively large.
In addition, the high specific surface activity of carbon nanotubes and the large aspect ratio make it easy for carbon nanotubes to entangle together to form larger aggregates, which greatly weakens the excellent adsorption performance of a single carbon nanotube.

Method used

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  • Spherical porous adsorbent based on carbon nanotubes as well as preparation method and application of spherical porous adsorbent
  • Spherical porous adsorbent based on carbon nanotubes as well as preparation method and application of spherical porous adsorbent
  • Spherical porous adsorbent based on carbon nanotubes as well as preparation method and application of spherical porous adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Put 3.24 parts of β-cyclodextrin, 3.24 parts of distilled water and 0.004 parts of sodium borohydride in a round bottom flask, heat in a water bath at 30°C and 350~550rpm and stir evenly, then add 4.53 parts of epichlorohydrin, 5.0 part of NaOH (40wt%) solution, continue to stir for 20 minutes, then add 0.36 part of multi-walled carbon nanotubes, 0.2 part of cetyltrimethylammonium bromide, stir well, then add 52.7 parts of liquid paraffin, and stir mechanically at constant temperature for 6 hours; After the end, the reaction product was washed with petroleum ether, ethanol, and distilled water several times until the liquid paraffin was washed, and then the product was placed in a vacuum drying oven at 60°C to heat and dry to obtain a carbon nanotube / β-cyclodextrin composite material , and then placed in a nitrogen atmosphere furnace for calcination at 500°C for 5 hours to obtain a spherical porous adsorbent with a carbon nanotube content of 82%.

Embodiment 2

[0023] Put 2.52 parts of β-cyclodextrin, 2.52 parts of distilled water and 0.004 parts of sodium borohydride in a round bottom flask, heat in a water bath at 30°C and 350~550rpm and stir evenly, then add 3.52 parts of epichlorohydrin, 3.5 1 part of NaOH (40wt%) solution, continue to stir for 20 minutes, then add 1.08 parts of multi-walled carbon nanotubes, 0.2 parts of cetyltrimethylammonium bromide, stir well, then add 52.7 parts of liquid paraffin, and stir mechanically at constant temperature for 6 hours; After the end, the reaction product was washed with petroleum ether, ethanol, and distilled water several times until the liquid paraffin was washed, and then the product was placed in a vacuum drying oven at 60°C to heat and dry to obtain a carbon nanotube / β-cyclodextrin composite material , and then placed in a nitrogen atmosphere furnace for calcination at 500°C for 5 hours to obtain a spherical porous adsorbent with a carbon nanotube content of 86%.

Embodiment 3

[0025] Put 1.8 parts of β-cyclodextrin, 1.8 parts of distilled water and 0.004 parts of sodium borohydride in a round bottom flask, heat in a water bath at 30°C and 350~550rpm and stir evenly, then add 2.5 parts of epichlorohydrin, 2.8 1 part of NaOH (40wt%) solution, continue to stir for 20 minutes, then add 1.8 parts of multi-walled carbon nanotubes, 0.2 parts of cetyltrimethylammonium bromide, stir well, then add 52.7 parts of liquid paraffin, and stir mechanically at constant temperature for 6 hours; After the end, the reaction product was washed with petroleum ether, ethanol, and distilled water for several times until the liquid paraffin was washed, and then the product was placed in a vacuum drying oven at 60°C to heat and dry to obtain a carbon nanotube / β-cyclodextrin composite material , and then placed in a nitrogen atmosphere furnace for calcination at 500°C for 5 hours to obtain a spherical porous adsorbent with a carbon nanotube content of 90%.

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Abstract

The invention provides a spherical porous adsorbent based on carbon nanotubes as well as a preparation method and application of the spherical porous adsorbent. The spherical porous adsorbent based on the carbon nanotubes is prepared by adopting an inverse phase suspension polymerization method, treating by a cross linking agent and an initiator to compound the multi-wall carbon nanotubes and beta-cyclodextrin, and carrying out high-temperature calcination. The obtained spherical porous adsorbent has the characteristics that the grain diameter is 0.5mm to 1.4mm, the specific surface area is 85.8m<2> / g to 332.1m<2> / g, the average diameter of pores is 6.4nm to 29.0nm, and the total pore volume is 0.183cm<3> / g to 0.533cm<2> / g; the spherical porous adsorbent has relatively good adsorption performance on an organic pollutant 4-chlorophenol, and the adsorption capacity is 56.7mg / g to 105.2mg / g; the spherical porous adsorbent can be used as an absorption material for the 4-chlorophenol in wastewater.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a spherical porous adsorbent based on carbon nanotubes and its preparation method and application. Background technique [0002] Phenol in the environment mainly comes from coking, oil refining, gas production, phenol and its compounds, and phenol-containing wastewater and waste gas discharged from industries that use phenol as raw materials. Phenol and its compounds are toxic substances that can enter the human body through skin, mucous membranes, respiratory tract and oral cavity, etc., and chemically react with proteins in cells in the body to inactivate cells and invade the nerve center. , stimulate the spinal cord, and eventually lead to systemic poisoning. When untreated phenol-containing wastewater is discharged into the natural environment, phenol will volatilize into the atmosphere or seep into the ground, pollute the atmosphere, groundwater and crops, and...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J20/34C02F1/28C02F101/36
CPCB01J20/20B01J20/265B01J20/28019B01J20/28054B01J20/3475C02F1/285C02F2101/36
Inventor 卢月美张梦
Owner FUZHOU UNIV
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