Method for manufacturing mono-layer carbon nano pipe

A technology of single-layer carbon nanotubes and manufacturing methods, applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve problems such as unobtainable, short single-layer carbon nanotubes, and difficult separation of single-layer carbon nanotubes

Inactive Publication Date: 2008-04-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main disadvantage of this treatment is that it is difficult, albeit to a lesser extent, to avoid the simultaneous destruction of single-walled carbon nanotubes by the oxidizing agent
However, in these processes, not only is it difficult to separate single-walled carbon nanotubes from other additives, but it is also impossible to obtain typical single-walled carbon nanotubes with lengths shorter than hundreds of nanometers.

Method used

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  • Method for manufacturing mono-layer carbon nano pipe
  • Method for manufacturing mono-layer carbon nano pipe
  • Method for manufacturing mono-layer carbon nano pipe

Examples

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Effect test

Embodiment 1

[0197] Acid Treatment of Single Walled Carbon Nanotubes

[0198] As the single-walled carbon nanotubes, those synthesized by the catalytic decomposition method of hydrocarbons were used as they were. The morphology of the single-walled carbon nanotubes is shown in figure 1 , and their resonance Raman spectra are shown in figure 2 . These single-walled carbon nanotubes are first stripped of metal impurities and subjected to a nitric acid reflux process to create defects on the tube walls. Add 1.2g of just-synthesized single-walled carbon nanotubes to 200mL of 2.6M HNO 3 The solution was then refluxed at 140° C. for 48 hours. Next, it was washed several times (4-5 times) with distilled water until the pH of the resulting sample became neutral.

[0199] Dispersant Treatment of Single Walled Carbon Nanotubes

[0200] HNO 3 The treated single-walled carbon nanotubes were suspended in 200 mL of water containing 4 mL of Triton X-100 as a surfactant and adjusted to pH 10 ...

Embodiment 2

[0211] In order to remove metal impurities and improve dispersibility, HNO was obtained by the same process as used in Example 1 3 -Triton-Single-walled carbon nanotubes. However, during cut-off, instead of HNO 3 / H 2 SO 4 solution, using H 2 o 2 / H 2 SO 4 solution as a cut-off reagent. in 10 mL of 30% H 2 o 2 Add 40 mL of 96% H to the solution 2 SO 4 , prepare a fresh solution (4:1, vol / vol, 96% H 2 SO 4 / 30%H 2 o 2 ). After lowering the temperature to 35°C, immediately disperse 25 mg of HNO in the mixture 3 -Triton-single-walled carbon nanotubes, followed by ultrasonic treatment at this temperature for 30 hours. After sonication, the suspension was added to 1 L of distilled water to quench the oxidation reaction. Next, the solution was filtered and washed several times with distilled water until the final pH reached 7. Next, the obtained sample was dried at 120° C. for 24 hours. TEM images of these samples at different magnifications Figure 8 A and B ar...

Embodiment 3

[0216] In order to remove metal impurities and improve dispersibility, HNO was obtained by the same process as used in Example 1 3 -Triton-Single-walled carbon nanotubes. However, during cut-off, instead of HNO 3 / H 2 SO 4 solution, using (NH 4 ) 2 SO 8 / H 2 SO 4 solution as a cut-off reagent. 25mg of HNO 3 -Triton-single-walled carbon nanotubes in 50 mL of 96% H 2 SO 4 Pre-disperse for 1 hour to homogenize the mixture. Next, add 4 g of ammonium persulfate (NH 4 ) 2 S 2 o 8 As an oxidizing agent, the mixture was subjected to ultrasonic treatment at 35-40° C. for 4, 8, 20, and 30 hours. After sonication, the suspension was added to 1 L of distilled water to quench the oxidation reaction. Next, the solution was filtered and washed several times with distilled water until a final pH of 7 was reached. Next, the obtained sample was dried at 120° C. for 24 hours. The TEM image of the sample subjected to ultrasonic treatment for 20 hours is shown in Figure 10 mid...

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Abstract

This invention provides a method for manufacturing the same length, high purity, single-layer carbon nanometer tubes with safety, high yield and controllable product length. The carbon series material, including single-layer carbon nanometer tubes, manufactured by various kinds of synthesis, is treated by nitric acid or the like, removing the metal impurities and forming defects on the wall of said nanometer tubes. Then, said carbon series material is treated by nitric acid, hydrogen peroxide, persulphates or this kinds of oxidants, cutting said single-layer nanometer tubes, finally the same is treated by reductive gas, such as ammonia, for removing the carbon impurity, and restoring from the defects for the single-layer carbon nanometer tubes.

Description

technical field [0001] The present invention relates to a manufacturing method of single-walled carbon nanotubes, a manufacturing method of single-walled carbon nanotubes and a device for applying single-walled carbon nanotubes, for example, preferably applied to the manufacture of electronic components using single-walled carbon nanotubes. Background technique [0002] Recently, carbon nanotubes have attracted the attention of many researchers. Among them, the research and development of single-walled carbon nanotubes are particularly expected due to their unique one-dimensional structure and unusual structure-dependent properties. Single-walled carbon nanotubes potentially exhibit superior mechanical properties to any other known material due to their seamless cylindrical graphite-like shell structure. In addition to these excellent mechanical properties, single-walled carbon nanotubes exhibit a variety of unique chemical and physical properties that provide possible appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 梶浦尚志刘阳桥高濂孙静
Owner SONY CORP
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