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Method for preparing nano metal or metal oxide/carbon nano-tube composite material

A technology of carbon nanotubes and composite materials, applied in the field of nanomaterials, can solve the problems of carbon nanotube electronic structure damage, low efficiency, cumbersome steps, etc., and achieve the effects of low cost, short process flow and huge application prospects

Inactive Publication Date: 2008-09-03
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first type of method is simple and convenient, but the efficiency is very low
Although the second and third types can obtain better composite materials, the steps are relatively cumbersome, and high-temperature heating methods are also used to obtain composite materials.
In addition, the second type of method requires oxidant pretreatment of carbon nanotubes to introduce active groups on the surface of carbon nanotubes, but it causes damage to the electronic structure of carbon nanotubes.

Method used

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  • Method for preparing nano metal or metal oxide/carbon nano-tube composite material
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  • Method for preparing nano metal or metal oxide/carbon nano-tube composite material

Examples

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Embodiment 1

[0032] Carbon nanotubes were prepared by chemical vapor phase method. Pure carbon nanotubes were activated with hydrogen plasma in a radio frequency sputtering deposition furnace for 1 h. Then put the carbon nanotubes dispersed and deposited on the Cu grid in a thermal evaporation furnace, and use the thermal evaporation method to evacuate to 5×10 -3 Pa, the evaporation time is 2min. The Ag / CNT nanocomposite material with Ag nanoparticles deposited on the surface was obtained. figure 2 , image 3 , Figure 4 They are SEM pictures, XRD pictures and TEM pictures of Ag / CNT nanocomposites, respectively. Experiments have shown that a large number of strongly bonded Ag nanoparticles are deposited on the surface of carbon nanotubes.

Embodiment 2

[0034] The preparation and treatment of the carbon nanotubes were the same as in Example 1, and nano Cu was deposited on the carbon nanotubes by the radio frequency sputtering deposition method. The target material is made of high-purity Cu disk, and the vacuum is evacuated to 5×10 -3 Pa, argon gas was introduced, and the flow rate was 20 sccm. After the pressure in the reaction chamber was stabilized at 2 Pa, the RF power was turned on and the power was adjusted to 200 W to generate plasma. The coating time was 7 minutes. After cooling to room temperature, the samples were taken out, and part of the samples were placed in the air for heat treatment for 2 hours, the heat treatment temperature was 400°C, and the condition was air.

[0035] Figure 5 , Figure 6 SEM photos and TEM photos of Cu and carbon nanotube composites obtained by vapor deposition for 7 minutes. The results show that a large number of Cu particles are wrapped around the surface of the carbon nanotubes to...

Embodiment 3

[0037]15 mg of carbon nanotubes activated by hydrogen plasma as described in Example 1 were ultrasonically dispersed in 80 ml of absolute ethanol aqueous solution (volume ratio 1:1), and 20 ml of zinc acetate solution (0.02 mol / l) was added, and magnetically stirred Finally, add 50% ammonia water until the pH value of the solution is 8-11, filter after fully stirring, disperse the solid phase in 100ml water, and adjust the pH value of the solution with ammonia water. The above reactant was sealed in a polytetrafluoroethylene-lined reaction kettle, stood at 200°C for 10h, and then rapidly cooled to room temperature, the product was washed and filtered with deionized water, and dried at 80°C. In the absence of carbon nanotubes, nano-zinc oxide particles were prepared in the same process with 10 ml of the above-mentioned zinc acetate solution, as Figure 9 . The prepared samples were then subjected to alkaline blue photocatalytic degradation experiments, such as Figure 10 . T...

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Abstract

The invention relates to a simple practical preparation for metal or metal oxide / carbon nano-tube nano-composite, characterized in: with carbon nano-tube as the matrix, Fe, Co, Ni, Si, Ag, Au, Ti, Zn, Al, Mg, Ta, Pd, Mo, Sn and Pt as well as oxide nano-materials thereof are prepared by any method of radio frequency sputtering deposition, pulsed laser deposition, spraying schizolysis, hot evaporation or hydrothermal method, metal or metal oxide nano-grain or nano-film is formed on the surface of a carbon nano-tube. By this method, carbon nano-tube matrix composite material having multiple forms can be prepared, the process is simple, the cost is low, the carbon nana-tube matrix composite material has special optical property, electrical property, and magnetic property, thus having wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of nanometer metal or metal oxide / carbon nanotube composite material, which belongs to the field of nanomaterials. Background technique [0002] Carbon nanotubes (CNTs) have attracted widespread attention since their discovery in 1991 due to their unique structure, special physical and chemical properties. With the increasing maturity of carbon nanotube synthesis technology, low-cost mass production of carbon nanotubes has been realized. Therefore, high-performance composite materials composed of carbon nanotubes and other materials are an important direction and means for the wide application of carbon nanotubes. It is also one of the key contents of domestic and foreign scholars' research. [0003] The application of carbon nanotubes in composite materials mainly focuses on the following two aspects: (1) using carbon nanotubes as a carrier (matrix or template) to improve the properties of materials such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/18C23C14/02C23C14/58C23C14/35C30B33/00C30B7/10
Inventor 李效民吴永庆于伟东徐军夏长泰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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