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Nanostructure material assembled by carbon nanotubes prepared based on low-temperature pyrolysis of metal-organic framework compounds, preparation method of nanostructure material and application

A metal-organic framework and carbon nanotube technology, applied in the direction of carbon nanotubes, nanotechnology for materials and surface science, nanocarbon, etc., can solve problems such as simple structure and limited high-temperature pyrolysis, and achieve simple and efficient methods. The effect of cheap raw materials, simple process and environmental protection

Inactive Publication Date: 2017-06-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current carbon-based materials are limited by high-temperature pyrolysis and relatively simple structures.
Therefore, it is still a great challenge to obtain the structure of complex carbon nanotube assemblies based on different types of metal-organic frameworks through a low-temperature and universal method.

Method used

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  • Nanostructure material assembled by carbon nanotubes prepared based on low-temperature pyrolysis of metal-organic framework compounds, preparation method of nanostructure material and application
  • Nanostructure material assembled by carbon nanotubes prepared based on low-temperature pyrolysis of metal-organic framework compounds, preparation method of nanostructure material and application
  • Nanostructure material assembled by carbon nanotubes prepared based on low-temperature pyrolysis of metal-organic framework compounds, preparation method of nanostructure material and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Dissolve 1 mmol of cobalt nitrate hexahydrate in 25 mL of methanol; in addition, weigh 4 mmol of 2-methylimidazole and dissolve in 25 mL of methanol, then pour into the former pink solution, and stir the mixed solution for 24 h. Centrifuge and wash three times with methanol solution to obtain a purple solid, which is the metal organic framework compound Co-ZIF-67 powder;

[0041] 2) Place the powder obtained in step 1) in an oven at 80°C to dry for 5h;

[0042] 3) The metal-organic framework compound Co-ZIF-67 powder obtained in step 2) was placed under an argon atmosphere at a temperature of 2 °C for min -1 The hollow dodecahedral structure material (product) assembled with nitrogen-doped carbon nanotubes can be obtained by slowly heating up to 435° C. and holding the temperature for 8 hours.

[0043] The formation process of the hollow dodecahedral structure assembled by nitrogen-doped carbon nanotubes of the present invention: such as figure 1 As shown, the form...

Embodiment 2

[0051] 1) Weigh 2mmol of cobalt nitrate hexahydrate and 0.3mmol of ferric nitrate nonahydrate and dissolve them in 20mL of N,N-dimethylformamide; The methylformamide solution was mixed, fully stirred, transferred to a 50 mL reaction kettle, and kept at 180 °C for 24 h. The metal organic framework compound Co, Fe-ZIF powder was obtained by centrifuging and washing three times with methanol solution;

[0052] 2) Place the powder obtained in step 1) in an oven at 80°C to dry for 5h;

[0053] 3) The metal-organic framework compound Co, Fe-ZIF powder obtained in step 2) was placed in an argon atmosphere at a temperature of 2 °C min -1 The microsphere structure material (product) assembled with carbon nanotubes can be obtained by slowly heating up to 435° C. and holding the temperature for 8 hours.

[0054] The microsphere structure material assembled with the carbon nanotubes obtained in this example, such as Figure 14As shown, the precursor has a relatively uniform morphology ...

Embodiment 3

[0056] 1) take by weighing the nickel nitrate hexahydrate of 1mmol and be dissolved in the methanol of 20mL; in addition take by weighing the 2-methylimidazole of 4mmol also be dissolved in the methanol of 20mL, pour into former solution then, fully stir, transfer to 50mL reactor Incubate at 140°C for 12h. The metal organic framework compound Ni-ZIF powder was obtained by centrifuging and washing three times with methanol solution;

[0057] 2) Place the powder obtained in step 1) in an oven at 80°C to dry for 5h;

[0058] 3) The metal-organic framework compound Ni-ZIF powder obtained in step 2) was placed under an argon atmosphere at a temperature of 2 °C for min -1 The microsphere structure material (product) assembled with carbon nanotubes can be obtained by slowly heating up to 435° C. and holding the temperature for 8 hours.

[0059] The microsphere structure material assembled with the carbon nanotubes obtained in this example, such as Figure 15 As shown, the precurso...

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Abstract

The invention relates to a method of a nanostructure assembled by carbon nanotubes prepared based on low-temperature pyrolysis of metal-organic framework compounds. The method includes the steps: S1 weighing an appropriate amount of metal salt and organic ligand, performing complexing reaction on metal ions and the organic ligand in a solvent by liquid-phase synthesis to form the metal-organic framework compounds, and washing the compounds to obtain metal-organic framework compound powder; S2 placing the powder obtained in the step S1 in a drying box at the temperature of 80-100 DEG C, and drying the powder for 5-10 hours; S3 slowly heating the metal-organic framework compound powder obtained in the step S2 and keeping the temperature in inert atmosphere to obtain a nanostructure material assembled by carbon nanotubes. The method has the advantages that raw materials are low in price, the process is simple and environmentally friendly, yield is high, and the material is excellent in electrochemical performance. A universal strategy is provided for preparing the carbon nanotubes, and the method has large-scale application potential.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemical devices, and in particular relates to a method for preparing nanostructures assembled by carbon nanotubes at low temperature based on metal organic framework compounds. Promote universality. Background technique [0002] Found in 1991, carbon nanotubes are an important allotrope of carbon materials, with cylindrical structures, their diameters range from a few nanometers to tens of nanometers, and their lengths can range from several micrometers to several centimeters. Therefore, over the past few decades, carbon nanotubes have shown great potential in logic circuits, gas storage, bioimaging, catalysis, and energy storage due to their unique electrical, mechanical, and structural properties. Researchers have also invested great efforts in the synthesis of carbon nanotubes, and some more effective synthesis strategies have been invented, such as arc discharge method, lase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/16H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2004/133C01P2004/20C01P2004/32C01P2004/34C01P2004/50C01P2004/52C01P2004/61C01P2004/64C01P2004/80C01P2006/12C01P2006/16C01P2006/40H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 麦立强孟甲申牛朝江
Owner WUHAN UNIV OF TECH
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