Method for preparing multi-walled carbon nano tube

Abstract

The invention provides a method for preparing a multi-walled carbon nano tube. The method comprises the following steps: (1) placing ferrocene into a reaction chamber of a heating furnace; (2) introducing an inert gas or nitrogen to the reaction chamber to eliminate air inside the reaction chamber; (3) stopping introducing the inert gas or nitrogen, and heating the reaction chamber at the heating rate of 10-15 DEG C / min, so that the temperature of the reaction chamber ascends to 400 DEG C, and ferrocene sublimates; (4) introducing argon or hydrogen to the reaction chamber at the rate of 50-250ml / min, and heating the reaction chamber at 10-15 DEG C / min, so that the temperature of the reaction chamber ascends to 1200 DEG C; (5) continuing to introduce argon or hydrogen into the reaction chamber at the rate of 50-250ml / min, and introducing acetylene into the reaction chamber at the rate of 8-50ml / min, keeping constant temperature at 1200 DEG C for a certain period of time, and cooling to room temperature, so as to obtain the multi-walled carbon nano tube.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube preparation, in particular to a convenient and rapid preparation method of multi-walled carbon nanotubes. Background technique [0002] The preparation of carbon nanotubes is the premise of their research and application. The ability to obtain a sufficient amount of carbon nanotubes with uniform diameter, high purity and few structural defects is the basis for their performance and application research, and the large-scale and cheap synthesis process is also the industrial application of carbon nanotubes. guarantee. Looking at all known preparation methods, we can find a common feature: through various external energies, the carbon source is dissociated into atoms or ions, and then the one-dimensional structure of this carbon can be obtained through condensation. [0003] At present, carbon nanotubes are mainly prepared by the following three methods: arc method, graphite laser evaporati...

AI Technical Summary

Problems solved by technology

However, due to the low reaction temperature, the degree of graphitization of the prepared carbon nanotubes is poor, and there are many defects, especially the catalyst particles introduced in the preparation process, which are finally attached or coated in the carbon nanotubes (usually in the Ends) are difficult to remove, which brings difficulties to the characterization and further application of many properties of carbon nanotubes

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