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Method for preparing MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tubes and application thereof

A technology of nitrogen-doped carbon and nanotubes, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of long operation process and easy clogging of extraction columns, and achieve Simple design, good adsorption capacity and reproducibility, and the effect of reducing the cost of use

Inactive Publication Date: 2018-09-14
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SPE has the advantages of easy operation and less solvent consumption, but it also has the disadvantages of easy clogging of the extraction column and long operation time.

Method used

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  • Method for preparing MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tubes and application thereof
  • Method for preparing MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tubes and application thereof
  • Method for preparing MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tubes and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of synthetic method of magnetic nitrogen-doped carbon nanotube material, it comprises the following steps:

[0022] 1.1 Preparation of ZIF-67:

[0023] (a): 1.5 g of 2-methylimidazole (2-MeIm) was dissolved in 20 mL of methanol / ethanol mixed solution (v:v=1:1), and dissolved by ultrasonication; another cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) 1.5 g, ultrasonically dissolved in 20 mL methanol / ethanol mixed solution (v:v=1:1); (b): Mix the two clear solutions, stir vigorously for 5 s, and then let stand at room temperature for 15 h; ( c): After the reaction was completed, the obtained product was washed three times with ultrapure water and anhydrous methanol successively, centrifuged at 3000 rpm for 3 minutes, and the obtained product was vacuum-dried at 30°C overnight to obtain purple ZIF-67 crystals.

[0024] 1.2 Preparation of magnetic nitrogen-doped carbon nanotube materials:

[0025] (a): Put 0.1g ZIF-67 in a tube furnace and raise the temperature ...

Embodiment 2

[0028] A kind of synthetic method of magnetic nitrogen-doped carbon nanotube material, it comprises the following steps:

[0029] 1.1 Preparation of carboxylated ZIF-67:

[0030] (a): 1.0g of terephthalic acid (H 2 BDC) and 1.5 g of 2-methylimidazole (2-MeIm) were dissolved in 30 mL of methanol / ethanol mixed solution (v:v=25:1), and dissolved by ultrasonication; another cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) 2.0g, ultrasonically dissolved in 30mL methanol / ethanol mixed solution (v:v=25:1); (b): Mix the two clear solutions, stir vigorously for 15 s, then react at 100 ℃ for 10 h; (c ): After the reaction was completed, the obtained product was washed three times with ultrapure water and anhydrous methanol successively, centrifuged at 5000rpm for 4 min, and the obtained product was vacuum-dried at 50°C overnight to obtain purple carboxylated ZIF-67 crystals .

[0031] 1.2 Preparation of magnetic nitrogen-doped carbon nanotube materials:

[0032] (a): 2.0 g ZIF-67 ...

Embodiment 3

[0034] A kind of synthetic method of magnetic nitrogen-doped carbon nanotube material, it comprises the following steps:

[0035] 1.1 Preparation of ZIF-67@ZIF-8 bimetallic MOF:

[0036] (a): 2.5 g of 2-methylimidazole (2-MeIm) was dissolved in 40 mL of methanol / ethanol mixed solution (v:v=50:1), and dissolved by ultrasonic; another cobalt nitrate hexahydrate (Co(NO 3 ) 2·6H 2 O) 1.5 g and zinc chloride hexahydrate (Zn(Cl) 2 ·6H 2 O) 0.8 g, ultrasonically dissolved in 40 mL methanol / ethanol mixed solution (v:v=50:1); (b): Mix the two clear solutions, stir vigorously for 25 s, and then let stand at room temperature for 30 h; (c): After the reaction was completed, the obtained product was washed with ultrapure water and anhydrous methanol three times respectively, centrifuged at 8000 rpm for 5 min, and the obtained product was vacuum-dried at 70°C overnight to obtain a light purple ZIF- 67@ZIF-8 bimetallic MOF crystal.

[0037] 1.2 Preparation of magnetic nitrogen-doped ca...

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Abstract

The invention discloses an MOF (metal organic frameworks)-based magnetic nitrogen-doped carbon nano-tube material, a method for preparing the same and application of the MOF-based magnetic nitrogen-doped carbon nano-tube material. The MOF-based magnetic nitrogen-doped carbon nano-tube material can be used as an adsorption material. MOF are calcined at the high temperatures to obtain the MOF-basedmagnetic nitrogen-doped carbon nano-tube material. Carbon nano-tubes with large quantities of free N elements are generated on the surfaces of the MOF-based magnetic nitrogen-doped carbon nano-tube material while the appearance of the MOF is reserved. The MOF-based magnetic nitrogen-doped carbon nano-tube material, the method and the application have the advantages that the MOF are used as templates for the MOF-based magnetic nitrogen-doped carbon nano-tube material which is a magnetic carbon material prepared by the aid of the method, and are directly calcined at the high temperatures to obtain the magnetic carbon material; the carbon material is high in environmental stability as compared with MOF adsorption materials, and pi-pi conjugation can be formed by the carbon material and targetobjects by the aid of strong conjugation surfaces of the carbon nano-tubes; the MOF-based magnetic nitrogen-doped carbon nano-tube material is extremely high in magnetism as compared with commercialcarbon nano-tubes, and target object detection procedures can be simplified by the aid of MSPE (magnetic solid-phase extraction) methods; processes for preparing the MOF-based magnetic nitrogen-dopedcarbon nano-tube material are simple, and the MOF-based magnetic nitrogen-doped carbon nano-tube material which is a magnetic nitrogen-doped carbon nano-material is high in magnetism and super-high inenvironmental stability, has large specific surface areas, can be specifically bound with the target objects and has an excellent application prospect in the field of detection on the content of microcystin in lake water and the like.

Description

technical field [0001] The invention relates to a preparation method and application of MOF-based magnetic nitrogen-doped carbon nanotubes. Background technique [0002] Algae are the oldest organisms on the earth. They have large differences in shape and simple structure. Generally, there are more types in the ocean than in freshwater. Algae have a variety of nutrition and reproduction methods. They can grow rapidly under suitable conditions, and gather on the water surface under the action of their own buoyancy and hydrological factors, forming algae liquid visible to the naked eye, that is, "red tide" (Red Tide) tide) or "Water-bloom". "Red tides" or "water blooms" are mostly toxin-producing algae, and their occurrence causes great harm to the environment and aquaculture industry, and is regarded as a worldwide public nuisance. Chemical analysis is a common method for the detection of algal toxins and has high sensitivity. It includes high-performance liquid chromatogr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28G01N30/02B01J20/30
CPCB01J20/02B01J20/0259B01J20/28009G01N30/02
Inventor 张兰陈晖黄川辉童萍林明霞张宁
Owner FUZHOU UNIV
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