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Method for preparing carbon nano-tube by diffusion flame with stable limited area

A technology of diffusing flame and carbon nanotubes, which is applied in the field of preparing carbon nanotubes, and can solve problems such as poor repeatability, difficult stable state, unfavorable flame method application, etc.

Inactive Publication Date: 2010-01-13
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there are also certain problems in the preparation of carbon nanotubes by the above-mentioned flame method, especially when liquid fuel is used, it is difficult for the diffusion flame to maintain a relatively stable state during the combustion process. During the preparation process, the flame will swing and jump. This kind of instability has a great influence on the prepared product, which will cause various shapes of the product, and the repeatability is relatively poor, which is not conducive to the practical application of the flame method.

Method used

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  • Method for preparing carbon nano-tube by diffusion flame with stable limited area
  • Method for preparing carbon nano-tube by diffusion flame with stable limited area
  • Method for preparing carbon nano-tube by diffusion flame with stable limited area

Examples

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Effect test

Embodiment 1

[0027] Take 0.29g of analytically pure nickel nitrate and dissolve it in 10ml of absolute ethanol to form a 0.1mol / l nickel nitrate solution and apply it on a clean copper substrate and let it dry naturally. Insert the bracket into the wick of an alcohol lamp, put the dry copper substrate on the bracket, put on the support ring, light the alcohol lamp filled with ethanol, cover with a flame stabilization cover, burn for 10 minutes, extinguish the flame, and obtain the product. The morphology of the product was characterized by scanning electron microscopy. Figure 4 It can be seen that its morphology is fibrous, with a single shape and a diameter of about 40-50nm; Figure 5 Display: Under a high-resolution transmission electron microscope, it can be seen that it is a multi-walled carbon nanotube whose crystal lattice is arranged in a fishbone shape.

Embodiment 2

[0029] Take 0.29g of analytically pure nickel nitrate and dissolve it in 10ml of absolute ethanol to form a 0.1mol / l nickel nitrate solution and apply it on a clean copper substrate and let it dry naturally. Insert the bracket into the wick of the alcohol lamp, put the dry copper substrate on the bracket, put on the support ring, light the alcohol lamp filled with methanol, cover with the flame stabilization cover, burn for 10 minutes, extinguish the flame, and obtain carbon nanotubes.

Embodiment 3

[0031] Take 0.29g of analytically pure nickel nitrate and dissolve it in 10ml of absolute ethanol to form a 0.1mol / l nickel nitrate solution and apply it on a clean copper substrate and let it dry naturally. Insert the bracket into the wick of the alcohol lamp, put the dry copper substrate on the bracket, put on the support ring, light the alcohol lamp filled with acetone, cover with the flame stabilization cover, burn for 10 minutes, extinguish the flame, and obtain carbon nanotubes.

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Abstract

The invention discloses a method for preparing a carbon nano-tube by diffusion flame with a stable limited area, belonging to the technical field of preparation of nanometer materials. The method is characterized by comprising the following steps: preparing transitional metal salt ethylate solution and coating the transitional metal salt ethylate solution on a substrate; naturally drying and placing the substrate on a support inserted in a lamp wick; igniting flame, and covering a flame stable cover to obtain the diffusion flame with the stable limited area; keeping the substrate in the diffusion flame for 1-30 minutes and extinguishing the flame to obtain the carbon nano-tube. The method has the characteristics of simple apparatus and simple process, and obviously improves the repeatability and the consistency for preparing the carbon nano-tube due to the good stability of the diffusion flame with the stable limited area, thereby being hopeful to realize industrialization.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotubes, in particular to a method for preparing carbon nanotubes by using confined stable diffusion flames. Background technique [0002] Carbon nanotubes are a one-dimensional tubular structure composed of carbon elements, which can be regarded as seamless hollow tubes rolled by graphite layers. According to the number of graphite layers, they can be divided into single-walled carbon nanotubes and double-walled carbon nanotubes. tubes and multi-walled carbon nanotubes. In 1991, the Japanese Iijima first discovered carbon nanotubes in samples prepared by observing arc discharge in a transmission electron microscope, and characterized the crystal structure of carbon nanotubes. [0003] Because carbon nanotubes have many unique mechanical, electrical, thermal and other properties, such as carbon nanotubes have extremely high Young's modulus, but the density is very small; they have ballistic tran...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 程进邹小平
Owner BEIJING INFORMATION SCI & TECH UNIV
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