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Palladium nanoparticle modified carbon nanotube composite material as well as preparation method and application thereof

A technology of carbon nanotubes and composite materials, applied in the field of nanomaterials, to achieve the effect of easy mass production

Inactive Publication Date: 2014-03-19
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can successfully load palladium nanoparticles on the surface of carbon nanotubes, there are still various defects

Method used

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  • Palladium nanoparticle modified carbon nanotube composite material as well as preparation method and application thereof
  • Palladium nanoparticle modified carbon nanotube composite material as well as preparation method and application thereof
  • Palladium nanoparticle modified carbon nanotube composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a carbon nanotube composite material modified with palladium nanoparticles.

[0041] The device used to prepare the carbon nanotube composite material modified with palladium nanoparticles is a gas-liquid glow plasma reaction device, such as figure 1 Said, the gas-liquid glow plasma reaction equipment is a stainless steel furnace. The stainless steel furnace is a cylinder with an inner diameter of 70mm and has 4 visible glass windows. The stainless steel furnace has a stainless steel plate located in the upper position of the furnace. The anode and the cathode of a stainless steel vessel containing a mixture of carbon nanotubes, palladium acetate, and 1-butyl-3-methylimidazole tetrafluoroborate located at the lower position in the furnace, the distance between the anode and the cathode is 2-6mm, the cathode is connected to a DC power supply (KIKUSUI PMC500V-0.1A).

[0042] The preparation method of the carbon nanotube composite material modified by p...

Embodiment 2

[0048] This embodiment provides a carbon nanotube composite material modified with palladium nanoparticles. The device used to prepare the carbon nanotube composite material modified with palladium nanoparticles is the device described in Example 1.

[0049] The preparation method of the palladium nanoparticle-modified carbon nanotube composite material is basically the same as the preparation method in Example 1, except that the amounts of carbon nanotubes and palladium acetate are 50 mg and 2.2 mg, respectively (carbon nanotubes and Pd The mass ratio is 49:1).

[0050] The prepared carbon nanotube composite material modified with palladium nanoparticles was analyzed by scanning electron microscopy, and the resulting scanning electron microscopy picture is as follows: Image 6 Shown. by Image 6 It can be seen that the particle size of the palladium nanoparticles is 4-6 nm, and the particle size of the palladium nanoparticles is small and the dispersion is uniform.

Embodiment 3

[0052] This embodiment provides a carbon nanotube composite material modified with palladium nanoparticles. The device used to prepare the carbon nanotube composite material modified with palladium nanoparticles is the device described in Example 1.

[0053] The preparation method of the carbon nanotube composite material modified by palladium nanoparticles is basically the same as the preparation method in Example 1, except that the amounts of carbon nanotubes and palladium acetate are 50 mg and 5.6 mg, respectively (carbon nanotubes and Pd The mass ratio is 19:1).

[0054] The prepared palladium nanoparticle-modified carbon nanotube composite material was analyzed by scanning electron microscopy, and the resulting scanning electron microscopy picture is as follows Figure 7 Shown. by Figure 7 It can be seen that the particle size of the palladium nanoparticles is 5-7 nm, and the particle size of the palladium nanoparticles is small and the dispersion is uniform.

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Abstract

The invention provides a palladium nanoparticle modified carbon nanotube composite material as well as a preparation method and application thereof. The preparation method comprises the steps of using a mixture of a carbon nanotube, palladium acetate and 1-butyl-3-methylimidazole tetrafluoroborate as a cathode of gas-liquid glow plasma reaction; implementing gas-liquid glow plasma reaction for 10-15 minutes in an argon atmosphere that argon pressure is 150-300Pa and under conditions that voltage is 220-250V and current is 0.01-0.05A, to obtain a crude product; and washing, ultrasonically processing, centrifuging and drying the crude product to obtain the palladium nanoparticle modified carbon nanotube composite material. The palladium nanoparticle modified carbon nanotube composite material is prepared by the preparation method provided by the invention. Furthermore, the invention provides the application of the palladium nanoparticle modified carbon nanotube composite material as a catalyst in preparation of a biphenyl derivative in Suzuki coupling reaction.

Description

Technical field [0001] The invention relates to a carbon nanotube composite material modified by palladium nanoparticles and a preparation method and application thereof, and belongs to the technical field of nanomaterials. Background technique [0002] As a precious metal, palladium has a wide range of applications in the fields of chemistry and chemical catalysis. However, since metal nanoparticles are easily agglomerated during the preparation and application process, it is difficult to control the preparation of monodisperse palladium nanoparticles. The general treatment method is to load palladium nanoparticles on a carrier. Carbon nanotubes have a relatively large aspect ratio, which can provide more catalytically active surface for the catalyst. Moreover, the carbon nanotubes are not porous and have relatively small size, which is very helpful for the reaction products to leave the catalyst surface quickly, which can reduce the occurrence of the second reaction and make ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B82Y40/00B82Y30/00C07C49/782C07C45/68
Inventor 杨帆李永峰任亮迟成刘婷
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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