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Synthesis of double walled carbon nano-tubes

A technology of double-walled carbon nanotubes and a synthesis method, which is applied in the field of synthesis of double-walled carbon nanotubes, can solve problems such as inappropriate process parameters, no double-walled carbon nanotubes are found, etc., and achieves simple operation, high stability, and improved performance. Yield effect

Inactive Publication Date: 2003-11-19
TSINGHUA UNIV
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Problems solved by technology

However, due to inappropriate process parameters, no double-walled carbon nanotubes were found in the product

Method used

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  • Synthesis of double walled carbon nano-tubes
  • Synthesis of double walled carbon nano-tubes

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Embodiment Construction

[0009] The invention relates to a method for synthesizing double-walled carbon nanotubes. It is carried out in the quartz tube of the horizontal quartz tube resistance furnace experimental device. According to the following process respectively: the molar ratio is 5: 1, 10: 1, 20: 1, weigh appropriate amount of ferrocene and sulfur, after mixing, grind in a mortar for 30 minutes to uniformly mix to prepare the catalyst precursor. Dissolve 300 mg, 400 mg, and 1000 mg of the prepared catalyst precursor in 20 ml of n-hexane to prepare a reaction solution. Raise the reaction temperature to 1100°C, 1150°C, 1180°C, feed 1 liter / min, 1.5 liter / min, 2 liter / min of argon and 0.3 liter / min, 0.4 liter / min, 0.6 liter / min Hydrogen, the reaction solution was sent into the quartz tube with a peristaltic pump at a rate of 0.3 ml / min. After 30 minutes, 40 minutes, and 50 minutes of reaction, the hydrogen was turned off and the argon flow was reduced, and the electric furnace was cooled to roo...

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Abstract

A process for synthesizing dual-wall carbon nanotubes uses n-hexane as carbon source, ferrocene as catalyst procursor, the mixture of argon gas and hydrogen gas as carrier, and sulfur instead of thiophene as additive. Said dual-wall carbon nanotubes are synthesized in horizontal resistance furnace by gas-phase chemical deposition method with higher flow of said gas mixture of argon and hydrogen. Its advantages are simple process and high stability.

Description

technical field [0001] The invention belongs to the technical scope of nanometer material preparation, in particular to a method for synthesizing double-walled carbon nanotubes. Background technique [0002] Carbon nanotubes have excellent physical and mechanical properties, and have a wide range of application prospects. Double-walled carbon nanotubes are the key type between single-walled carbon nanotubes and multi-walled carbon nanotubes. The layer-to-layer spacing of double-walled carbon nanotubes is 0.34-0.42 nm, which is larger than that of general multi-walled carbon nanotubes. Due to the larger interlayer structure of double-walled carbon nanotubes, double-walled carbon nanotubes have similar or even superior physical properties to single-walled carbon nanotubes. In addition, due to the large diameter and interlayer spacing of double-walled carbon nanotubes, they can be used as excellent hydrogen storage materials. The study of double-walled carbon nanotube pairs ...

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Application Information

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IPC IPC(8): C01B31/02C23C16/00D01F9/127
Inventor 韦进全江斌张先锋李延辉吴德海
Owner TSINGHUA UNIV
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