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Carbon doped nano tube aerogel and preparation method and application thereof

A carbon nanotube and aerogel technology, applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., to achieve the effect of strengthening the cross-linking force of the system, reducing the cost and reducing the difficulty

Active Publication Date: 2015-03-25
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no metal residue-free multi-walled carbon nanotube aerogels obtained by solution method have been reported.

Method used

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  • Carbon doped nano tube aerogel and preparation method and application thereof
  • Carbon doped nano tube aerogel and preparation method and application thereof
  • Carbon doped nano tube aerogel and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0075] (1) Take 8 mL of the aqueous dispersion of oxidized multi-walled carbon nanotubes with a concentration of 4 mg / mL, add 0.8 mL of pyrrole as an accelerator, mix the two evenly in a small beaker, put them in a hydrothermal kettle, and place them in water at 180 ° C. Thermal reaction for 20 hours to obtain carbon nanotube / pyrrole composite hydrogel;

[0076] (2) Wash the hydrogel with a large amount of water, and then use a large amount of ethanol to replace the water in the gel to obtain an ethanol gel of carbon nanotubes / pyrrole, dry it with supercritical carbon dioxide, and dry it for 9 hours to obtain a carbon nanotube / pyrrole ethanol gel. The nanotube / pyrrole airgel is then carbonized at 1030° C. for 3 hours under the protection of argon to obtain the nitrogen-doped carbon nanotube airgel provided by the present invention.

[0077] figure 1 It is a digital photo of the nitrogen-doped carbon nanotube airgel (promoter is pyrrole) obtained in this example and the airgel...

Embodiment 2

[0097] (1) Take 8 mL of oxidized multi-walled carbon nanotube solution with a concentration of 4 mg / mL, add 0.8 mL of pyrrole, mix the two evenly in a small beaker, put them in a hydrothermal kettle, and react at 180 ° C for 20 hours to obtain carbon Nanotube / pyrrole composite hydrogel;

[0098] (2) The hydrogel was washed with a large amount of water, and freeze-dried for 24 hours to obtain a carbon nanotube / pyrrole aerogel.

[0099] (4) The carbon nanotube / pyrrole aerogel was carbonized at 1030° C. for 3 h under the protection of argon to obtain the nitrogen-doped carbon nanotube aerogel.

Embodiment 3

[0101] (1) Take 8 mL of oxidized single-walled carbon nanotube solution with a concentration of 4.5 mg / mL, add 0.8 mL of aniline, mix the two evenly in a small beaker, put them in a hydrothermal kettle, and react at 180 ° C for 20 h to obtain Carbon nanotube / aniline composite hydrogel;

[0102] (2) The hydrogel is washed with a large amount of water, and then the water in the gel is replaced with a large amount of ethanol, thereby obtaining a carbon nanotube / aniline ethanol gel.

[0103] (3) Drying the carbon nanotube / aniline ethanol gel with supercritical carbon dioxide for 9 hours to obtain the carbon nanotube / aniline airgel.

[0104] (4) The carbon nanotube / aniline airgel was carbonized at 1030° C. for 3 h under the protection of argon to obtain the nitrogen-doped carbon nanotube airgel.

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Abstract

The invention discloses carbon doped nano tube aerogel and a preparation method and an application of the carbon doped nano tube aerogel. The method comprises the following steps: (1) mixing aqueous dispersion liquid of a carbon oxide nano tube with accelerants for hydrothermal reaction to obtain the carbon nano tube hydrogel; and (2) drying the carbon nano tube hydrogel obtained in the step (1) to obtain the carbon doped nano tube aerogel, and carbonizing to obtain the carbon doped nano tube aerogel. The testing results show that the aerogel has high specific surface area and high conductivity, has strong adsorption capacity to dyes and organic solvents, and has excellent catalytic performance to the oxygen reduction reaction, can be widely applied to various energy and environment fields, such as a fuel-cell catalyst, a supercapacitor and organic pollutant disposal.

Description

technical field [0001] The invention relates to the field of materials, in particular to the field of aerogels in the field of materials, in particular to a carbon nanotube-doped aerogel and its preparation method and application, belonging to the field of aerogels. Background technique [0002] Carbon nanotubes are a new type of carbon material discovered at the end of the 20th century. It is a one-dimensional tubular material with several excellent properties. For example, the electron mobility of carbon nanotubes exceeds 10000 cm 2 ·V -1 ·s -1 , and has the characteristics of ballistic electron transport, which can be used as a field emitter; the semiconducting carbon nanotubes obtained by controlled synthesis or separation have a band gap, and can be directly used in FET devices without having to be like graphene Additional methods are used to open the bandgap; it can withstand up to 10 9 A·cm -2 The current density; the thermal conductivity of carbon nanotubes is ...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/20B01J20/28B01J20/30B01J21/18B01J35/02C01B31/02G01N9/08
CPCB01J13/00B01J20/205G01N9/08C01B32/158B01J20/28007B01J20/3085B01J21/185B01J2220/42B01J35/40B01J35/617B01J35/615
Inventor 张锦杜然
Owner PEKING UNIV
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