Method for manufacturing indium-tin-iron catalyst for use in production of carbon nanocoils

Abstract

A method for manufacturing an indium-tin-iron type catalyst that is used to obtain carbon nanocoils that have an external diameter of 1000 nm or less, the method comprising a first process that forms an organic solution by mixing an indium-containing organic compound and a tin-containing organic compound with an organic solvent, a second process that forms an organic film by coating a substrate with the thus obtained organic solution, a third process that forms an indium-tin film by baking this organic film, and a fourth process that forms an iron film on the surface of this indium-tin film.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a method for manufacturing an indium-tin-iron type catalyst which is used for producing carbon nanocoils that have an external diameter of 1000 nm or less and more particularly to a method for manufacturing an indium-tin-iron type catalyst for use in the production of carbon nanocoils which allows inexpensive mass production by utilizing metal-containing organic compounds and an organic solvent.[0003] 2. Prior Art[0004] The history of carbon nanocoils in which the external diameter of the coil is on the order of nanometers is relatively brief.[0005] In 1994, Amelinckx et al. (Amelinckx, X. B. Zhang, D. Bernaerts, X. F. Zhang, V. Ivanov and J. B. Nagy, SCIENCE, 265 (1994) 635) succeeded in producing carbon nanocoils. While carbon microcoils discovered in the past have an amorphous structure, it has been ascertained that carbon nanocoils have a graphite structure. Various types of carbon nanocoils have been prepar...

AI Technical Summary

Problems solved by technology

However, the coil yield is small, and such a method cannot be utilized in industrial production.

However, in this manufacturing method as well, the rate of coil production is small, and thus this method is extremely inadequate as an industrial mass production method.

Since the ITO substrate is expensive, and since the catalyst is prepared by the vacuum evaporation of iron, which is a method unsuited to mass production, the resulting indium-tin-iron type catalyst is extremely expensive.

The high cost of such ITO substrates is attributable to the method used to manufacture these substrates.

Thus, problems such as contamination of the environment and corrosion of the apparatus, etc. occur.

Since this method is performed inside a sealed vessel, it is unsuitable for mass production.

Since the operation is performed inside a vacuum apparatus, it is not suitable for mass production.

Thus, since conventional indium-tin-iron type catalysts are manufactured by the vacuum evaporation of iron on an expensive ITO substrate, the manufacturing cost is high, and then mass production is impossible.

As a result, the inexpensive mass production of carbon nanocoils is considered impossible.