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A high-yield synthesis method of double-helical carbon nanotubes

A technology of carbon nanotubes and synthesis methods, applied in the direction of carbon nanotubes, nanocarbons, nanotechnology, etc., to achieve the effects of increasing yield, increasing yield, and improving catalytic performance

Inactive Publication Date: 2016-01-13
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a method for high-yield synthesis of high-selectivity double-helical carbon nanotubes to solve the problems of application research and product development caused by the low yield of double-helical carbon nanotubes in the prior art

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  • A high-yield synthesis method of double-helical carbon nanotubes
  • A high-yield synthesis method of double-helical carbon nanotubes

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Embodiment Construction

[0014] Below are examples of the present invention (reagents used in the examples are all chemically pure), and this experimental process is mainly completed in two steps:

[0015] The first step: first 1molFeCl 2 4H 2 O (ferrous chloride tetrahydrate), 1.5mol citric acid particles mix, add 100mL dehydrated alcohol wherein, the gained mixture is put into three-necked bottle, after stirring in 60 ℃ of water baths for 6 hours, the gained sol is 80 in the baking oven After heat treatment at °C for 6 hours, heat treatment at 150 °C until the corresponding xerogel is obtained; the resulting xerogel can be obtained after heat treatment at 450 °C in air for 4 hours in a high-temperature furnace to obtain the desired catalyst precursor powder;

[0016] Step 2: spread a certain amount of catalyst precursor powder (50mg) in a small ceramic boat and push it into the tubular quartz tube to the position of the thermocouple of the tubular furnace, and under the protection of argon, the re...

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Abstract

The invention discloses a high-yield synthesis method of double helical carbon nanotubes, which is characterized by comprising the following steps: (1) mixing FeCl2·4H2O, citric acid particles and absolute ethanol according to the quantitative ratio of 1mol:1.5mol:100mL , after stirring in a water bath, heat treatment of the obtained sol in an oven until a dry gel is obtained; (2) heat treatment of the obtained dry gel to obtain the desired catalyst precursor powder; (3) the obtained powder is spread in a small porcelain boat, Under the protection of argon, the reaction temperature was raised from room temperature to 450°C, the argon was turned off and hydrogen was switched off immediately for 1 hour, the hydrogen was turned off and acetylene and water vapor were switched off immediately for 2 hours, and cooled to room temperature , collect the black sample. The results of transmission electron microscopy and field emission scanning electron microscopy of the samples show that the synthesized samples are double helical carbon nanotubes with high selectivity. Compared with the current international reported data (8.3), the yield of double helical carbon nanotubes obtained by this scheme has been greatly improved.

Description

technical field [0001] The invention belongs to the preparation technology of carbon nanotubes, in particular to a high-yield preparation method of double-helix carbon nanotubes. Background technique [0002] Helical carbon nanomaterials can be regarded as a chiral material formed by introducing some carbon pentagons and carbon heptagons into the carbon hexagonal grid. Theoretical studies have shown that if an electric current passes through a single helical carbon nanomaterial, an induced magnetic field can be generated. Therefore, helical carbon nanomaterials have great potential applications in miniature electromagnetic wave nanoconverters and nanoswitches. In addition, a lot of theoretical research work shows that helical carbon nanomaterials not only have the physical and chemical properties of carbon nanomaterials, but also have the advantages brought by their own helical structure. Its helicity plays a decisive role in the electronic transport characteristics of car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y40/00C01B32/16
Inventor 祁小四
Owner GUIZHOU UNIV