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Novel composite material based on metal-organic framework material and carbon nanotube and preparation method of novel composite material

A metal-organic framework, carbon nanotube technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor symmetry, insufficient coordination of metal ions, poor stability of self-assembled structures, etc., and achieve the best adsorption performance. Effect

Inactive Publication Date: 2016-05-04
BEIJING FORESTRY UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carboxylated carbon nanotubes contain low carboxyl functional groups and poor symmetry, which makes their coordination with metal ions insufficient, and the stability of the self-assembled structure formed is poor.

Method used

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  • Novel composite material based on metal-organic framework material and carbon nanotube and preparation method of novel composite material
  • Novel composite material based on metal-organic framework material and carbon nanotube and preparation method of novel composite material

Examples

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Embodiment 1

[0029]0.5 g of unmodified carbon nanotubes were placed in a mixture of concentrated sulfuric acid and concentrated nitric acid (volume ratio 3:1), ultrasonically treated at 80°C for 8 h, rinsed with a large amount of deionized water and cleaned with a pore size of 0.2 μm The polytetrafluoroethylene microporous membrane was vacuum-filtered to collect the carbon nanotubes; and then repeatedly rinsed with deionized water until the filtrate was neutral, and then vacuum-dried at 80° C. for 24 hours to obtain the acidified carbon nanotubes. Place the acidified carbon nanotubes in thionyl chloride and keep stirring and refluxing for 12 hours at 80°C, then collect the carbon nanotubes by suction filtration or centrifugation under reduced pressure; then repeatedly use anhydrous tetrahydrofuran to wash the obtained carbon nanotubes at 90°C Vacuum drying for 24 h to obtain acid chloride carbon nanotubes. Dissolve 1 g of 2-aminoterephthalic acid in 100 ml of anhydrous dimethylformamide, a...

Embodiment 2

[0032] The embodiment of chemical modification of carbon nanotubes is the same as that of Example 1. The embodiment used to prepare the composite material is the same as that of Comparative Example 2, but in NH 2 0.01 g of chemically modified carbon nanotubes were added to the synthesis system of _MIL-101(Fe). Prepared by microwave synthesis, carbon nanotubes / NH 2 _MIL-101(Fe). figure 1 is the carbon nanotube / NH prepared in this example 2 _MIL-101 (Fe) nanoparticle transmission electron microscope, the measured adsorption results of this example are shown in Table 1.

[0033] figure 1 and figure 2 It can be seen that the morphology of the synthesized composite materials are cubic crystals of linear carbon nanotubes in series metal organic framework materials. Comparing the adsorption properties in Table 1 and Table 2, the adsorption capacity of the prepared carbon nanotube / MOF composite material is significantly higher than that of carbon nanotubes and metal organic fra...

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Abstract

The invention discloses a novel composite material based on a metal-organic framework material and a carbon nanotube and a preparation method of the novel composite material. The carbon nanotube is chemically modified, so that the outer wall of the carbon nanotube is connected with an organic ligand functional group, and the modified carbon nanotube can be combined with the metal-organic framework material through a ligand bonding effect between metal ions and the organic ligand functional group, therefore a novel porous composite material is obtained. A carbon nanotube connected with dicarboxylic acid is obtained by means of performing three reactions of carboxylation, acylating chlorination and amidation on the carbon nanotube; the carbon nanotube connected with the dicarboxylic acid is mixed with dicarboxylic acid monomers and metal salt monomers; the composite material is prepared through a solvent thermal synthesis method. The novel composite material disclosed by the invention has the advantages that the characteristics of two types of porous materials are combined, so that better adsorption and separation performances are obtained.

Description

technical field [0001] The invention relates to a novel composite material based on a metal-organic framework material and carbon nanotubes and a preparation method thereof; the material combines the characteristics of two types of porous materials and exhibits better adsorption and separation performance. Background technique [0002] Metal-organic framework is a new type of porous material with large specific surface area, high porosity, chemical modification and structural composition diversity. This type of material is a porous material self-assembled by multidentate organic ligands containing oxygen or nitrogen (mostly aromatic polyacids and polybases) and transition metal ions. It has broad applications in the fields of gas storage, adsorption separation, and catalysis. application prospects. In recent years, the preparation of novel composites based on metal-organic frameworks has attracted widespread attention. Combining the structural properties of metal-organic f...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/20B01J20/226B01J2220/46B01J2220/4806B01J2220/4812
Inventor 王璐莹雷建都何静刘静邓立红
Owner BEIJING FORESTRY UNIVERSITY
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