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Method for coating carbon nano-tube with metal doped zinc oxide nano-particle

A ZnO nanometer and metal-doped technology, which is applied in the field of metal-doped ZnO nanoparticle-coated carbon nanotubes, can solve the problems of difficult inorganic nanoparticle interaction, easy agglomeration surface activity, etc., and achieve low cost, particle size The effect of uniform diameter distribution and small particle size

Inactive Publication Date: 2009-02-25
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to propose a method for coating carbon nanotubes with metal-doped zinc oxide nanoparticles in view of the defects that carbon nanotubes are easy to agglomerate, have low surface activity, and are difficult to interact with inorganic nanoparticles. , by modifying the surface of carbon nanotubes, zinc oxide nanoparticles can be uniformly and densely coated on the surface of carbon nanotubes; this method not only has simple process conditions, but also has a mild reaction, which greatly simplifies the oxidation The process and cost of coating carbon nanotubes provide an effective way to solve the current international technical problems in the preparation of such materials, and also provide useful enlightenment for other types of nanoparticles coating carbon nanotubes

Method used

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  • Method for coating carbon nano-tube with metal doped zinc oxide nano-particle
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  • Method for coating carbon nano-tube with metal doped zinc oxide nano-particle

Examples

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Embodiment 1

[0023] 1) Dissolve 3 g of single-walled carbon nanotubes prepared by chemical vapor catalytic cracking in 500 mL of NaOH solution with a concentration of 2 mol / L, ultrasonically disperse for 30 min, reflux it for 2 h in a boiling state, then filter and rinse with deionized water several times , so that the pH value of the filtrate is neutral, and finally the obtained precipitate is dried and ground for later use;

[0024] 2) Add the carbon nanotubes obtained in the above step 1) to 500 mL of concentrated sulfuric acid and concentrated nitric acid mixed acid prepared at a volume ratio of 3:1, stir with a magnetic stirrer for 30 minutes, and then ultrasonically disperse for 30 minutes with an ultrasonic instrument, and then Heat to reflux at 100°C for 2h, filter the obtained precipitate and then use 500mL of analytically pure hydrochloric acid with a concentration of 2mol / L to reflux for 2h at 100°C, then filter and rinse with deionized water to make the pH of the filtrate until ...

Embodiment 2

[0028] 1) Dissolve 3 g of multi-walled carbon nanotubes prepared by chemical vapor catalytic cracking in 500 mL of 3 mol / L KOH solution, ultrasonically disperse for 30 min, reflux for 2 h in a boiling state, filter and rinse with deionized water several times, Make the pH value of the filtrate until neutral, and finally dry and grind the obtained precipitate for use;

[0029] 2) Add the carbon nanotubes obtained in the above step 1) to 500 mL of concentrated sulfuric acid and concentrated nitric acid mixed acid prepared at a volume ratio of 3:1, stir with a magnetic stirrer for 30 minutes, and then ultrasonically disperse for 30 minutes with an ultrasonic instrument, and then Heat to reflux at 100°C for 2h, filter the obtained precipitate and then use 500mL of analytically pure hydrochloric acid with a concentration of 2mol / L to reflux for 2h at 100°C, then filter and rinse with deionized water to make the pH of the filtrate until neutral. Finally, dry and grind the obtained p...

Embodiment 3

[0033]1) Dissolve 3g of single-walled carbon nanotubes prepared by chemical vapor catalytic cracking in 500mL of 1mol / L ammonia solution, stir with a magnetic stirrer for 30min, and then disperse it with an ultrasonic instrument for 30min, then reflux it in a boiling state 2h, then filter and rinse several times with deionized water to make the pH of the filtrate neutral, and finally dry and grind the obtained precipitate for use;

[0034] 2) Add the carbon nanotubes obtained in the above step 1) into 500 mL of concentrated sulfuric acid and concentrated nitric acid mixed acid prepared at a volume ratio of 3:1, stir with a magnetic stirrer for 30 minutes, and then ultrasonically disperse for 30 minutes with an ultrasonic instrument, and then in 100 Heat to reflux at ℃ for 2h, filter and then reflux the obtained precipitate with 500mL of analytically pure hydrochloric acid with a concentration of 2mol / L at 100℃ for 2h, then filter and rinse with deionized water to make the pH of...

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Abstract

The invention relates to a method for coating a carbon nanotube with metal-doped zinc oxide nano-particles, which mainly comprises the following steps: an alkaline solution and a mixed acid are adopted to treat the carbon nanotube; and then zinc acetate and metal acetate are taken as raw materials, absolute ethyl alcohol is taken as a solvent, oxalic acid is taken as a complexing agent, and co-precipitation method and subsequent heat treatment are adopted to prepare the carbon nanotube coated by the metal-doped zinc oxide nano-particles. The method utilizes a simple method to functionalize the carbon nanotube, so that the carbon nanotube is coated evenly and compactly by the zinc oxide nano-particles can be realized, and the nano-particles obtained have the advantages of even particle size distribution, small particle size, simple preparation process, low cost, etc. The major characteristic of the method is that: a surfactant is non-essential for modifying the carbon nanotube. The composite powder obtained not only can be taken as a powder raw material for preparing high-performance carbon nanotube / metal-based and carbon nanotube / ceramic-based composite materials, but also can be applied to the fields of optical devices, spinning electron devices, gas sensors, and the like.

Description

technical field [0001] The invention relates to a method for coating carbon nanotubes with metal-doped zinc oxide nanoparticles. Background technique [0002] Carbon nanotubes have a unique tubular structure and excellent mechanical, optical, electrical, and magnetic properties. grades. However, because carbon nanotubes have a large aspect ratio and high surface energy, they are extremely easy to agglomerate; in addition, their surface is complete and smooth, with few dangling bonds and low surface chemical activity. These reasons make it difficult for carbon nanotubes to interact with other substances and form an effective load transfer, which limits the further development of their excellent performance. [0003] In order to improve the performance of carbon nanotubes and optimize and broaden their application fields, it is necessary to modify the surface of carbon nanotubes. Using inorganic, organic, biological and other materials to modify and modify the surface of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 陈传盛陈小华刘天贵郭凯敏宁振武朱灿何晨冲
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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