US 8,475,761 B2 · Method for producing carbon nanocoils

Abstract

The present invention discloses a method for producing carbon nanocoils, which comprises: providing a metal substrate; depositing a tin precursor on the substrate; heating the substrate with the precursor to a predetermined temperature to form a catalyst on the substrate; placing the substrate in a quartz tube furnace; and introducing carbon source gas and protective gas into the quartz tube furnace to allow carbon nanocoils to grow on the surface of the catalyst. Another method for producing carbon nanocoils is also disclosed, which includes: depositing a mixed solution of iron acetate and tin acetate on a substrate; heating the substrate with the mixing solution to a predetermined temperature to form a catalyst on the substrate; placing the substrate in a quartz tube furnace; and introducing carbon source gas and protective gas into the quartz tube furnace to allow carbon nanocoils to grow on the surface of the catalyst.

Claims15

Dependent claims

A method for producing carbon nanocoils, comprising following steps:

(a) providing a metal substrate made from iron-containing metal or an alloy thereof;
(b) forming a tin precursor on the surface of the metal substrate, wherein the tin precursor is selected from the group consisting of tin nanoparticle, SnCl3, (C2H3O2)2Sn, and SnO2;
(c) heating the substrate and the precursor to a predetermined temperature performed under an oxygen-containing atmosphere at a temperature of 400-900° C. to form iron-tin oxides as a catalyst on the metal substrate;
(d) placing the metal substrate with the catalyst thereon into a reaction furnace;
and
(e) introducing carbon-based gas and protective gas into the reaction furnace to grow carbon nanocoils on the surface of the catalyst.

3 more elements

Dependencies are inferred from the claim text.

Method for producing carbon nanocoils

Life of this patent

Method for producing carbon nanocoils

Life of this patent

Abstract

Claims15