Preparing method of nanometer particle carbon nanotube compound catalyst

A technology of carbon nanotubes and nanoparticles, which is applied in the field of preparation of nanoparticle carbon nanotube composite catalysts, can solve the problems of the difference between the amount of deposition and the theoretical value, and does not consider the shape and size of nanomaterial catalysts, etc. The effect of simple, good catalytic effect

Inactive Publication Date: 2008-07-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrochemical deposition method is a simple and high-quality method for depositing nanoparticles on carbon nanotubes, but there are some problems such as the accompanying H during the electrodeposition process. + The reduction, the amount of deposition is different from the theoretical value
[0006] In summary, the traditional method of depositing nanoparticle catalysts on carbon nanotubes has many shortcomings. More importantly, the above methods hardly consider nanomaterial catalysts with controllable shape and size. Difficult to support nanoparticle catalysts with controllable shape and size on carbon nanotubes

Method used

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  • Preparing method of nanometer particle carbon nanotube compound catalyst
  • Preparing method of nanometer particle carbon nanotube compound catalyst
  • Preparing method of nanometer particle carbon nanotube compound catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step (1): in the three-necked bottle that reflux condensing device is housed, add carbon nanotube and nitric acid, the weight (g) of carbon nanotube: nitric acid volume (ml) ratio is 1: 10, and the concentration of nitric acid is 1M, Reflux at 80°C for 2 hours while stirring mechanically or magnetically for 2 hours. After the solution is cooled to room temperature, dilute with distilled water. The volume ratio of distilled water: nitric acid is 1:1, and let it stand until the carbon nanotubes are completely Precipitate, discard the supernatant, and filter the suspension of the lower layer with a nitrocellulose membrane with a pore size of 0.22 μm, wash with distilled water until the pH value of the dropped droplets is between 6 and 7 to obtain a black filter cake of carbon nanotubes, 60 °C in vacuum to obtain purified carbon nanotubes.

[0043] Step (2): The molecule used to prepare non-covalently modified carbon nanotubes with negative charges on the surface is prefera...

Embodiment 2

[0049] Step (1): in the three-necked bottle that reflux condensing device is housed, add carbon nanotube and nitric acid, the weight (g) of carbon nanotube: nitric acid volume (ml) ratio is 1: 50, and the concentration of nitric acid is 3M, Reflux at 100°C for 24 hours, while stirring mechanically or magnetically, the stirring time is 24 hours. After the solution is cooled to room temperature, dilute with distilled water. The volume ratio of distilled water: nitric acid is 1:5, and stand until the carbon nanotubes are completely Precipitate, discard the supernatant, and filter the suspension of the lower layer with a nitrocellulose membrane with a pore size of 0.22 μm, wash with distilled water until the pH value of the dropped droplets is between 6 and 7 to obtain a black filter cake of carbon nanotubes, 60 °C in vacuum to obtain purified carbon nanotubes.

[0050] The molecule used to prepare non-covalently modified carbon nanotubes with negative charges on the surface is pr...

Embodiment 3

[0056] In a three-necked bottle equipped with a reflux condensing device, add carbon nanotubes and nitric acid, the weight (g) of carbon nanotubes: the volume (ml) of nitric acid ratio is 1: 100, the concentration of nitric acid is 1M ~ 5M, at 120 ℃ Under reflux for 48 hours, mechanical stirring or magnetic stirring at the same time, the stirring time is 48 hours, the solution is cooled to room temperature, diluted with distilled water, the volume ratio of distilled water: nitric acid is 1: 10, let stand until the carbon nanotubes are completely precipitated, discard Remove the supernatant, and filter the suspension of the lower layer with a nitrocellulose membrane with a pore size of 0.22 μm, wash with distilled water until the pH value of the dripping droplets is between 6 and 7 to obtain a black filter cake of carbon nanotubes, vacuum at 60°C dried to obtain purified carbon nanotubes.

[0057] Step (2): The molecule used to prepare non-covalently modified carbon nanotubes w...

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Abstract

The invention relates to a preparation method of a nano particle carbon nanotube compound catalyst. The carbon nanotube with electric charges on surface is obtained from the materials which can generate non-covalent action with the carbon nanotube. Then nano particle with opposite electric charges on surface to that of the non-covalent modified carbon nanotube is added and completely mixed, and excess nano particle is removed to finally obtain the nano particle carbon nanotube catalyst compound. A plurality of nano particle carbon nanotube catalyst compounds can be prepared by the invention, all of which represent very good catalytic activities. The invention adopts the method of non-covalent modified carbon nanotube to obtain carbon nanotube with perfect surface. Meanwhile, the invention provides the nano particle, in particular, the morphology controllable nano particle on the load of carbon nanotube with an effective way by utilizing the electrostatic interaction of carbon nanotube and namo particle, thus extending the applications of morphology controllable nano particle in catalytic field.

Description

technical field [0001] The invention relates to a method for preparing a nanoparticle carbon nanotube composite catalyst. Background technique [0002] Nanoparticles (NPs for short) refer to molecular aggregates with a size ranging from 1 to 100nm. The study of nanoparticles is an emerging science. nature has been paid more and more attention. Among the many application fields of nanoparticles, nanocatalysis is one of the central fields of nanoparticle research. As a new type of catalyst material, nanoparticles have high specific surface area and surface energy, so they have high activity; there are many kinds of nanoparticles, and the shape and size can be controlled, so that they have the diversity of catalytic types and excellent Due to their selectivity, nanoparticles have been widely used to catalyze various types of reactions, such as oxidation, hydrogenation, electron transfer, and fuel cells. However, in these catalytic reactions, the nanoparticles used are genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/08B01J31/26B01J21/18
Inventor 杨秀荣杨文杨帆王小磊杨成
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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