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Process for preparing tree-shaped carbon nano tube

A carbon nanotube and dendritic technology, which is applied in the field of preparation of nanomaterials, can solve problems such as dendritic carbon nanotubes that have not yet been seen, and achieve the effects of easy operation, novel and unique structure, and uniform distribution of tube diameters.

Inactive Publication Date: 2003-12-31
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

However, there have been no reports on dendritic carbon nanotubes containing two-dimensional and three-dimensional junctions

Method used

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  • Process for preparing tree-shaped carbon nano tube
  • Process for preparing tree-shaped carbon nano tube
  • Process for preparing tree-shaped carbon nano tube

Examples

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Embodiment 1

[0024] Example 1 0.356 g of cobalt nitrate hexahydrate was dissolved in 50 ml of absolute ethanol, and 5 g of magnesium oxide powder was added. The mixture was sonicated for 1 hour to make the solution uniform. The solvent was then removed by a rotary evaporator, followed by drying at 130°C for 13 hours to obtain a completely dried catalyst. The dried solid mixture is ground into a finer powder. In this way, a catalyst containing 1.25% by weight of cobalt is obtained. As shown in the figure (the tube furnace is produced by Beijing Electric Furnace Factory, the model is SK 2 As shown in -4-13), place a quartz boat (5 ml) containing 2 grams of the above catalyst in the middle of the quartz tube, connect the gas distribution system, and feed hydrogen at a flow rate of 300 ml per minute, and set the temperature to 1000 ℃, quickly raise the temperature to 1000℃ (within 12 minutes), and pass methane gas at a flow rate of 75 ml per minute. After 10 minutes of reaction, cut off the methan...

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Abstract

The preparation process of dendriform carbon nanotube includes following steps: preparing catalyst through dissolving cobalt salt in alcohol, soaking magnesia as catalyst carrier in the alcohol solution of cobalt salt, ultrasonic dispersion, evaporating, drying and crushing; and preparing dendriform carbon nanotube through set quartz boat holding the catalyst inside quartz tube, leading in hydrogen to eliminate air in the reaction system, heating to 850-1100 deg.c, leading in methane for reaction, cooling in hydrogen atmosphere, acidifying, washing, and vacuum drying. The process is suitablefor industrial production, and the prepared dendriform carbon nanotube has special electrical and dynamic properties and is one ideal material for constituting nano devices.

Description

Technical field: [0001] The invention relates to a method for preparing nano materials, in particular to a method for preparing dendritic carbon nanotubes. Background technique: [0002] Carbon nanotubes have become a material with great potential for special functions and nanodevices due to their unique electrical and mechanical properties. Like microelectronic devices, nanodevices will also be constructed from various heterostructures. Theoretical and experimental studies have shown that: according to the difference in diameter and helicity, carbon nanotubes exhibit a series of electrical properties from semiconductors to metals (Odom, TW; Huang, J.-L.; Kim, P.; Lieber, CMJPhys .Chem.B2000, 104, 2794.), it can be seen that connecting two linear carbon nanotubes with different electrical properties will produce a heterojunction, which is of great significance for the construction of carbon nanotube-based nanodevices. . At present, there are two methods for preparing this kind of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 刘云圻胡平安王贤保王彪朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI
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