Rapid synthesis of TiO_2 hollow nanostructures with crystallized walls by using CuO as template and microwave heating

摘要

In this paper, TiO_2 hollow nanostructures with anatase walls have been rapidly fabricated by using CuO as template and microwave heating. These TiO_2 hollow nanostructures have been characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Experimental results showed that the TiO_2 shell transformed from amorphous to anatase phase in 3 min, induced by the hot CuO core under microwave irradiation. The diameter of TiO_2 hollow nanostructures is about 50-80 nm, and the length is about 200-300 nm. The thickness of the shell is about 3 nm. This method is promising to be used to synthesize other nanomaterials with a hollow nanostructure.