Method for preparing magnetic nanotube

The invention discloses a method for preparing a magnetic nanotube. The method comprises the following steps of: placing a 100 to 200nm-aperture aluminum oxide film into the middle of two quartz reaction tanks; adding unitary or binary ferric metal ion plating solution with the total concentration of 0.02 to 0.1 mol/L into one quartz reaction tank, and adding 5 to 15g/L sodium borohydride aqueoussolution into the other quartz reaction tank; standing at room temperature for 2 to 20 minutes; taking a black nanotube/an aluminum oxide composite membrane down; dissolving the black nanotube/ the aluminum oxide composite membrane in 1 to 2mol/L NaOH solution for not less than 5 minutes; and washing the dissolved nanotube for multiple times through distilled water and absolute ethanol, and drying under vacuum at room temperature to constant weight. Compared with the prior art, the method has the advantages that: the nanotube is synthesized by a one-step method, a synthesizing device is simple and the preparation cycle is short. The prepared magnetic nanotube has good loading function due to a porous structure so as to provide magnetic raw materials for the medicine in loading, targeted transport and the like.