Method for synthesis of spiral carbon nanotube by injection chemical vapor deposition

The invention discloses a method for synthesis of a spiral carbon nanotube by injection chemical vapor deposition, and the method includes the following steps: 1) using gamma-alumina as a carrier to prepare a Fe-Co or Fe-Ni catalyst; 2) the catalyst is put into a tube furnace for activation in a H2-Ar gas mixture; 3) an absolute ethanol and pyridine mixture is injected into the tube furnace by an injector, and by chemical vapor deposition of the mixture under 600-800 DEG C high-temperature conditions in inert atmosphere, a product is obtained. According to the method, by control of charge capacity, ratio, particle size, growth time, deposition temperature and other factors of an iron alloy catalyst, the productive rate, yield, quality, product form and structure of the helical carbon nanotube can be controlled. The synthesized helical carbon nanotube is high in yield, high in purity, large in specific surface area, simple in synthesis method, and easy to repeat.