Fabrication and Photocatalytic Property of One-Dimensional SrTiO3TiO2-xNx Nanostructures

Abstract EN

One-dimensional SrTiO3/TiO2−xNx nanostructures were prepared by the hydrothermal method and investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) measurements.

The photocatalytic activities of the prepared samples were evaluated by photodegrading the methylene blue (MB) solution.

According to the characterizations, the intermediate product of SrTiO3/titanate nanotubes was presented after hydrothermal processing of the TiO2−xNx nanoparticles with the mixed solution of NaOH and Sr(NO3)2.

The final product of SrTiO3/TiO2−xNx nanorods was obtained after calcining the intermediate.

As compared to the TiO2−xNx nanoparticles, the absorption performance of SrTiO3/titanate nanotubes or SrTiO3/TiO2−xNx nanorods was depressed, instead of improving it.

The mechanisms of the absorption property changes were discussed.

The SrTiO3/TiO2−xNx nanorods presented better photocatalytic activity than the TiO2−xNx nanoparticles or nanorods.

However, due to overmuch adsorption, the SrTiO3/titanate nanotubes gave ordinary photocatalytic performances.