Method for separating metallicity and semiconductivity nano-tube from single wall carbon nano-tube

A single-wall carbon nanotube and metal separation technology, which is applied in the field of carbon nanotubes, achieves low cost, improved dispersion, and is conducive to large-scale applications

Inactive Publication Date: 2008-05-28
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separation of carbon tubes according to their chiral angles has not been given in the prior art

Method used

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  • Method for separating metallicity and semiconductivity nano-tube from single wall carbon nano-tube
  • Method for separating metallicity and semiconductivity nano-tube from single wall carbon nano-tube
  • Method for separating metallicity and semiconductivity nano-tube from single wall carbon nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Implementation Example 1 : Purification of carbon tubes

[0035] Since the carbon tube powder used in the experiment has certain impurities, it is necessary to carry out pretreatment, that is, purification treatment, which can make the subsequent separation more effective and reliable. If the carbon tube powder used is relatively pure, the purification treatment in this embodiment may not be used.

[0036] The purification treatment method used in the present embodiment is: first, 1 weight part of carbon nanotubes is added to 10 weight parts of concentrated hydrochloric acid solution of 4 weight parts of sodium lauryl sulfate or sodium dodecyl sulfate, ultrasonic 3 After ~4h, let it stand still, pour out the upper layer of acid solution after the carbon tubes are precipitated, and then add new acid solution with surfactant to sonicate, in order to fully remove the catalyst particles in the carbon nanotubes, repeat this step until the acid solution The solution no long...

Embodiment 2

[0037] Implementation Example 2 : Polycyclic aromatic hydrocarbon compound-6,13-bis(2-(trimethylsilyl)ethynyl)pentacene is modified and the first step of separation product

[0038] 1 part by weight of the purified single-walled carbon nanotubes obtained in Example 1, and 0.09 parts by weight of 6,13-bis(2-(trimethylsilyl)ethynyl)pentacene in N-methylpyrrolidone 200W After mixing and ultrasonicating at high power for 3.5 hours, centrifuge at a speed of 12,000 rpm in a high-speed centrifuge to collect the supernatant and precipitate. Filter the supernatant and precipitate with a 0.22 micron microporous membrane, wash with a large amount of solvent to remove a small amount of unadsorbed or desorbed 6,13-bis(2-(trimethylsilyl)ethynyl)pentacene. The product on the filter was collected to obtain the supernatant and precipitate from the first separation. The supernatant was filtered with glass wool, and the filtrate was collected to obtain sample 1.

[0039] The characterization...

Embodiment 3

[0040] Implementation Example 3 : Modification of fused-ring aromatic compound-anthracene and the first product separation

[0041] Mix 1 part by weight of the purified single-walled carbon nanotubes obtained in Example 1 with 0.1 part by weight of anthracene in chloroform at a power of 200 W and sonicate for 3.5 hours, centrifuge at a speed of 12000 rpm in a high-speed centrifuge, and collect the supernatant and precipitate respectively. Filter the supernatant and precipitate with a 0.22 micron microporous membrane, and wash with a large amount of solvent to remove a small amount of unadsorbed or desorbed anthracene. The product on the filter was collected to obtain the supernatant and precipitate from the first separation. The supernatant was filtered with glass wool, and the filtrate was collected to obtain sample 1.

[0042] The characterization of the isolated product is shown in Figure 3, Figure 4 and Figure 5.

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Abstract

The invention discloses a method for separating enriching metallic and semiconductor carbon nano-tubes from single-walled carbon nano-tubes. The method of the invention is that: first, purified carbon nano-tubes of 1 weight account that waits for separation and 0.05 to 2 weight accounts of separating accelerator are taken to be added into organic solvent for ultrasonic mixing and lead the separating accelerator to sufficiently adsorb the specific carbon nano-tube, then liquid and sediments are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching metallic carbon-tubes are acquired; next, 1 weight account of sediment and 0.05 to 2 weight accounts of the separating accelerator are taken to be added into the organic solvent for ultrasonic mixing processing, then sediments and liquid are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching semiconductor carbon tubes are acquired.

Description

technical field [0001] The invention relates to a method for separating carbon nanotubes with specific chirality from single-wall carbon nanotubes, in particular to a method for separating metal-enriched and semiconductive carbon nanotubes from single-wall carbon nanotubes. Background technique [0002] Carbon nanotubes have many excellent characteristics, such as extremely high aspect ratio, high strength, high toughness, good chemical stability and thermal stability, and special electrical properties, making them suitable for composite reinforcement materials, nanoelectronic devices, field emission Electrodes, energy materials and many other fields have received extensive attention and research. [0003] The electrical properties of single-walled carbon nanotubes are controlled by the diameter and configuration of the carbon tubes. The configuration of carbon nanotubes is usually represented by two chiral characteristic parameters (n, m). When m=n, the chiral angle θ=30°,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/28C01B31/02C30B29/02C30B29/62C30B33/00
Inventor 刘彩虹张浩力张永辉力虎林
Owner LANZHOU UNIVERSITY
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