Preparation and application of three-dimensional carbon nanotubes grown from soil clay and graphene oxide

Abstract

A method for preparing a three-dimensional carbon nanotube composite structure comprises: providing a substrate; subjecting the substrate to nickel ion modification treatment to form at least one nickel ion nuclear seed on the substrate; providing a hydrogen gas to pass through the substrate and heating the substrate to a reduction temperature for reducing the nickel ion nuclear seed by the hydrogen gas at the reduction temperature; and supplying a carbon source gas and a protective gas to pass through the substrate and heating the substrate to a growth temperature so that the carbon atoms generated by the carbon source gas through the catalytic cracking of the nickel ion nuclear seed are deposited on the bottom of the nickel ion nuclear seed to form a carbon nanotube gradually, wherein the growth temperature is greater than or equal to the reduction temperature. The three-dimensional carbon nanotube composite structure prepared by the method and its application are also disclosed.