Preparation for composite material with nanometal or metal oxide distributed on surface of carbon nanotube uniformly

A technology of carbon nanotubes and nanometals, which is applied in the field of preparation of composite materials where nanometer metals or metal oxides are evenly distributed on the surface of carbon nanotubes, and can solve the problems of lack of inorganic compounds.

Inactive Publication Date: 2005-01-26
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although inorganic compound / carbon nanotube composites have been synthesized, there is still little skill in controlling the distribution of inorganic compounds on the surface of carbon nanotubes and the degree of formation of nanoparticles or even quantum dots.

Method used

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  • Preparation for composite material with nanometal or metal oxide distributed on surface of carbon nanotube uniformly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Add 20 mg of surface-functionalized carbon nanotubes and 1 g of aluminum isopropoxide to 200 mL of isopropanol, heat and ultrasonically disperse for 4 hours, let stand for 12 hours, and then centrifuge the suspension to retain a black solid Substances, put the complexed mixture in an oven to dry. Take 20 mg of the above mixture and put it into 200 mL of diethylene glycol aqueous solution (volume ratio 3:1), react at 95 °C for 2 h, then raise the temperature to 250 °C, and continue the reaction for 8 h to obtain a black product.

[0033] Observation of the resulting Al by high-resolution transmission electron microscopy 2 o 3Composite with carbon nanotubes, it can be seen that there are crystals with irregular shapes of about 10nm on the surface of carbon nanotubes, and the interval between crystals is 500nm, and the distribution is relatively uniform. X-ray diffraction showed Al 2 o 3 properties of crystals.

Embodiment 2

[0034] Example 2: 10 mg of surface-functionalized carbon nanotubes and 300 mg of copper acetate were ultrasonically dispersed in ethanol for 3 h, left to stand for 24 h, and then the suspension was centrifuged, and the precipitate was put into an oven to remove the solvent. The obtained mixture of copper acetate deposited on the surface of carbon nanotubes was put into a closed reactor together with 200 mL of glycerol solvent, and nitrogen gas was introduced. Under vigorous stirring, the temperature was raised to 200 ° C, and the reaction was stopped after 3 hours. The resulting suspension was centrifuged, and the precipitate was washed with distilled water for 3 times, and dried in a vacuum oven to obtain Cu 2 O and carbon nanotube composites.

[0035] The preparation method of metal Cu and carbon nanotube composite material is the same as Cu 2 O is similar to the carbon nanotube composite material, that is, the reaction time is extended to more than 5h, and the temperature ...

Embodiment 3

[0038] Example 3: 300 mg of surface-functionalized carbon nanotubes and 2 g of zinc acetate were ultrasonically dispersed in ethanol for 4 hours, left to stand for 24 hours, and the suspension was directly dried in an oven to remove the solvent. Mix 1 g of the obtained mixture of zinc acetate deposited on the surface of carbon nanotubes with 300 mL of diethylene glycol solvent, heat up to 300 °C under vigorous stirring, and after the hydrolysis reaction lasts for 3 hours, centrifuge and wash, and repeat 3 times, Put it into an oven and dry to obtain a dark gray ZnO and carbon nanotube composite material. The high-resolution transmission electron microscope observation found that in addition to the uniform distribution of ZnO of about 15-40nm on the surface of the carbon nanotubes, there are also some nano-ZnO crystals appearing alone in the background. XRD detection proves that the crystal is ZnO.

[0039] The preparation process of CdO and carbon nanotube composite material ...

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Abstract

The invention discloses the preparation for composite material with nanometal or metal oxide distributed on surface of carbon nanotube uniformly which comprises, stirring and stewing the precursor through long time supersound treatment, the precursor being metal organic compound and concentrated nitric acid treated carbon nano tube, thus resulting in coordination reaction between the metal organic compound and carbon nano tube surface carboxyl and/or carbonyl and/or hydroxyl with the presence of the alcohol solvent action, and forming cores on the carbon nano tube walls so as to form the composite material.

Description

technical field [0001] The invention belongs to a method for preparing a composite material in which nanometer metal or metal oxide is evenly distributed on the surface of carbon nanotubes. Background technique [0002] Due to the unique structure, special mechanical and electrical properties of carbon nanotubes, they have attracted widespread attention since they were discovered in 1991. At present, carbon nanotubes can form various composite materials with other materials, such as polymer composites, ceramic composites, layered composites, nitrogen-doped composites and carbon / carbon nanotube composites, etc. (Ann.Rev.Mater.Res.2003, 33, 419), these composite materials have potential application prospects in reinforcing fibers, new catalysts and electronic nanodevices. There are two ways to prepare composite materials using carbon nanotubes as templates, one is to obtain chemical bonding by functionalizing the surface of carbon nanotubes (Acc.Chem.Res.2002, 35, 1096), and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 余颖马丽丽黄文娅李家麟
Owner HUAZHONG NORMAL UNIV
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