Carbon nanotube confinement assembled molecular cluster and selective separation method and application thereof
A carbon nanotube and selective technology, applied in the direction of carbon nanotubes, multi-walled carbon nanotubes, nano-carbons, etc., can solve problems such as complex needs, high requirements for instruments, and inability to carry out industrial preparation, achieving strong repeatability, Simple operation effect
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Embodiment 1
[0033] This embodiment utilizes heteropolyacid salt molecular cluster K 6 P 2 W 18 o 62 (abbreviated as {P 2 W 18}) Selective assembly and separation of single-walled carbon nanotubes, specifically in accordance with the following steps:
[0034] By carbon nanotube: K 6 P 2 W 18 o 62 The mass ratio is 1:10 and weigh appropriate amount of raw materials. 200mgH at room temperature 6 P 2 W 18 o 62The powder was dissolved in 6 mL of deionized water to prepare a cluster solution, and then 20 mg of carbon nanotubes were dispersed in the previously prepared cluster solution. After stirring with a constant temperature magnetic stirrer for 48 hours, deionized water was added repeatedly for centrifugation and washing, and then placed After drying in a drying oven at 80°C, the assembled and separated samples were obtained, that is, heteropolyacid-assembled carbon nanotubes (abbreviated {P 2 W 18}@carbon nanotube).
[0035] {P obtained in this embodiment 2 W 18}@Carbon n...
Embodiment 2
[0037] In this embodiment, the polymer polyfluorene polymer (abbreviated as PFN) is used to disperse K in the toluene phase. 6 P 2 W 18 o 62 Assemble carbon nanotubes, specifically follow the steps below:
[0038] Press {P 2 W 18}@Carbon nanotube: PFN mass ratio is 5:6 Take the {P prepared in Example 1 2 W 18} @carbon nanotubes and PFN. Dissolve 6mg PFN in 20mL toluene at room temperature, then add 5mg{P 2 W 18}@Carbon nanotubes are added to the PFN toluene solution, and the probe ultrasonic method is used to ultrasonicate at a power of 500W for 20 minutes. The obtained solution is centrifuged at a high speed of 16000 rpm, and the supernatant after centrifugation is taken, which is the dispersed Heteropolyacid Salt Assembled Carbon Nanotube Solution.
[0039] Taking toluene as a reference, the dispersed heteropoly acid salt assembled carbon nanotube solution prepared in this example is characterized by absorption spectrum testing. The test wavelength range is 440nm t...
Embodiment 3
[0041] In this embodiment, the surface hydroxylated silicon wafers are used to assemble the dispersed heteropoly-salt-assembled carbon nanotube solution obtained in Example 2, specifically according to the following steps:
[0042] Place the silicon wafer in a clean beaker and clean it three times in an ultrasonic cleaner with deionized water and ethanol for 5 minutes each time. Add 5mL of hydrogen peroxide to the beaker, then add 15mL of concentrated sulfuric acid, seal it with a parafilm, and let it stand for 30 minutes to fully react. This reaction can make the surface of the silicon wafer hydroxylated. Wash 3 times with deionized water. Dry it with nitrogen and put it into a beaker, add 10 mL of toluene, quickly add 10 μL of 3-aminopropyltrimethoxysilane, seal it with a parafilm, and let it stand for 1 hour to react, which can aminate the silicon wafer. Pour off the reaction solution from the previous step, wash with toluene 3 times, and then blow dry with nitrogen. Spin...
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