Method for preparing fishbone-shaped nano carbon fibre for filling nano metal

Abstract

The invention relates to a fishbone carbon nanofiber for filling nano-metals, in particular to the preparation method of the fishbone carbon nanofiber for filling nano-metals. The invention discloses a method for preparing the fishbone carbon nanofiber for filling nano-metals. The invention can prepare the fishbone carbon nanofiber for filling nano-metals at lower temperature by chemical vapor deposition by adopting acetylene as carbon source, hydrogen gas as carrier gas, nitrogen gas or argon gas as dilution gas, nickel plate as catalyst and thiophene as co-catalyst. The inventive method hasthe advantages of simple process, easy control, low cost, and high output and purity, and is suitable for industrial production. The fishbone carbon nanofiber for filling nano-metal prepared by the method has the advantages of uniform diameter and high graphitization degree, and has wide application prospect in the fields of gas adsorption, catalytic reaction, structure enhancement, wave-absorbing material, electromagnetic screening material, microelectronic device, etc.

Description

A method for preparing fishbone-shaped carbon nanofibers filled with nanometer metals technical field The invention relates to fishbone nano-carbon fibers filled with nanometer metals, in particular to a method for preparing fishbone-shaped nano-carbon fibers filled with nanometer metals. Background technique Carbon nanofiber is a kind of fiber with a diameter of less than 100 nanometers that is formed by stacking graphite layers in a certain direction. Carbon nanofibers were discovered in the 1970s. The arrangement direction of graphite layers can be parallel, perpendicular or at a certain angle to the axis of the fiber. , when the arrangement direction of the graphite layer is at a certain angle to the axis of the carbon nanofiber, it is called a fishbone carbon nanofiber. The unique fishbone structure of the fishbone nanocarbon fiber makes it an attractive potential value in gas adsorption applications. In addition to the advantages in gas adsorption, the fishbone-like ...

AI Technical Summary

Problems solved by technology

At present, the methods reported at home and abroad for the preparation of fishbone nano-carbon fibers are mainly chemical vapor deposition (CVD). Nickel foam is used as a catalyst to prepare fishbone-shaped nano-carbon fibers. The preparation process of the above-mentioned nano-catalysts is very complicated, and the particle size is difficult to control. The surface of the particles, and then prepare nano-metal catalysts attached to the surface of ultra-fine silica and other particles by hydrogen reduction. These ultra-fine silica particles will be mixed in the nano-carbon fibers and it is difficult to remove them.

It is generally believed that the diameter of carbon nanofibers is equal to the diameter of catalyst particles, and people always try to obtain catalysts with smaller particle sizes, but the preparation of small diameter catalysts is difficult and expensive, and its application is limited to a certain extent. Carbon nanofibers only have nanometals at the top, and there are no literature and patent reports on fishbone-shaped carbon nanofibers filled with nanometals uniformly inside.

Images