Magnetic field effect on the photocatalytic activity of self-organized TiO2 nanotubes

摘要

In the present paper, the magnetic field effect on the photocatalytic activity of self-organized TiO2 nanotube arrays has been studied. Highly ordered TiO2 nanotube arrays with an average pore diameter of about 100 nm and an average length of about 2 μm were grown on a titanium foil by anodic oxidation. Photocatalytic experiments were conducted in a photoreactor, in which the anodized sample was surrounded by an electromagnetic device with the magnetic field direction vertical to the axes of the reactor. Experimental results showed that the photodegradation efficiency increases slightly by the increase of the magnetic field, indicating that the electron-hole pairs could be separated by applying magnetic field, and consequently enhancing photocatalytic activity.