The preparation and characterization of one-dimensional TiO2 nanostructure by hydrothermal method

摘要

Titanium dioxide (TiO2) is a kind of wide bandgap transparent metal oxide semiconductor and has shown great potential applications in photocatalysis, gas sensors and biomedical fields due to its superior properties, such as nontoxic, high photocatalytic efficiency and physicochemical stability. In this work, one-dimensional TiO2 nanostructure was successfully synthesized by hydrothermal method. The morphology and crystalline quality of TiO2 were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD), respectively. The results demonstrate that the structure of TiO2 evolved from "flower-like" structure to nanowire with the acid concentration increment. The sintering temperature has an important effect on the structure and crystalline quality of TiO2. The crystalline quality of TiO2 nanobelt was improved with the annealing temperature increment. When the sintering temperature increased to 1000 degrees C, the phase of TiO2 would transfer from anatase to rutile.