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Carbon nanotube metal organic frame composite material and preparation method thereof

A metal-organic framework and carbon nanotube technology, applied in the chemical field, can solve problems such as the adsorption performance of organic pollutants, the limitation of the amount of carbon nanotube surface properties, etc., and achieve the effect of simple preparation process and large specific surface area

Inactive Publication Date: 2019-09-20
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN109065800A discloses a method for preparing a metal-organic framework carbon nanotube composite material, which is used as a coating separator material, but the patent does not limit the surface properties of carbon nanotubes and the amount added to the composite material, so The applicable metal-organic framework materials are only Ce-based MOFs materials, not suitable for other types of MOFs materials, and the adsorption performance of organic pollutants has not been studied

Method used

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  • Carbon nanotube metal organic frame composite material and preparation method thereof
  • Carbon nanotube metal organic frame composite material and preparation method thereof
  • Carbon nanotube metal organic frame composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 0.2g carbon nanotubes functionalized with carboxyl groups on the surface, ultrasonically disperse them in 100ml DMF, dissolve 1.5mmol 2-aminoterephthalic acid and 1.5mmol zirconium chloride in 60ml DMF, and mix them with carbon nanotube dispersion Mix, put the mixture in a stainless steel reaction kettle, heat and react at 120°C for 24 hours, then cool to room temperature, wash the solid product repeatedly with chloroform, and centrifuge at 8000r / min. Vacuum drying at 70°C for 24 hours yielded CNT@UiO-66-NH2 composites, N 2 The adsorption test obtained a BET specific surface area of ​​556m 2 / g.

Embodiment 2

[0022] Change the added surface carboxyl functionalized carbon nanotubes amount to 0.5g, and keep the same reaction conditions as in Example 1 to prepare CNT@UiO-66-NH2 composite material, N 2 The adsorption test obtained a BET specific surface area of ​​442m 2 / g.

Embodiment 3

[0024] Take 0.2g of surface carboxyl-functionalized carbon nanotubes, ultrasonically disperse them in 100ml of DMF, dissolve 1.5mmol of trimesic acid and 2mmol of zirconyl dichloride in 100ml of DMF, and mix them with the carbon nanotube dispersion after the dissolution is complete. The mixed solution was placed in a stainless steel reaction kettle, heated and reacted at 120°C for 24 hours, then cooled to room temperature, the solid product was repeatedly washed with chloroform, and centrifuged at 8000r / min. Vacuum drying at 70°C for 24 hours yielded CNT@MOF-808 composites, N 2 The adsorption test obtained a BET specific surface area of ​​612m 2 / g.

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Abstract

The invention discloses a carbon nanotube metal organic framework (MOFS) composite material for adsorption of organic dyes in a water phase and a preparation method and application thereof. The method: ultrasonically dispersing surface carboxyl functionalized carbon nanotubes in an organic solvent, then adding a metal precursor and an organic ligand for forming MOF, and stirring and mixing uniformly; placing the mixture in a stainless steel reaction kettle, reacting at 100-220 DEG C for 12-48 hours, cooling to room temperature, washing the obtained solid product with a solvent, and drying under vacuum to obtain the carbon nanotube MOFS composite material. The carbon nanotube MOFS composite material prepared by the method has high specific surface area and shows superior selective adsorption performance on anionic dyes in wastewater in an aqueous solution, thus being applicable to the treatment of dye wastewater. At the same time, because the carbon nanotube MOFS composite material remains intact after adsorbing dye molecules, the carbon nanotube MOFS composite material can be reused, the treatment cost of the dye wastewater is reduced, and the pollution of dye waste to the environment can be greatly reduced.

Description

technical field [0001] The invention relates to the direction of coordination chemistry and polymer chemistry in the field of chemistry, in particular to a carbon nanotube metal organic framework composite material and a preparation method thereof, and the composite material is used as a dye adsorbent for the selective adsorption and absorption of anionic dyes in wastewater separate. Background technique [0002] The organic pollutants in the water environment are extremely harmful, and 18-20% of them are dyes, mainly from the textile, food, papermaking and printing and dyeing industries. Such substances are highly toxic, difficult to decompose, and highly chromatic, and are extremely harmful when ingested by organisms. The methods for dealing with organic dye pollutants mainly include physical methods, biological methods and chemical methods. Adsorption and removal of organic dye pollutants in the physical method is a relatively green and convenient treatment method. It h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/38
CPCB01J20/20B01J20/226C02F1/285C02F2101/308C02F2101/38
Inventor 桑欣欣倪才华石刚王大伟夏晓峰
Owner JIANGNAN UNIV