Fabrication and Photocatalytic Property of One-Dimensional SrTiO₃/<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:msub><mml:mrow><mml:mtext>TiO</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>-</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>N</mml:mtext></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Nanostructures

Abstract

One-dimensional SrTiO 3 /TiO 2− x N x 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 SrTiO 3 /titanate nanotubes was presented after hydrothermal processing of the TiO 2− x N x nanoparticles with the mixed solution of NaOH and Sr(NO 3 ) 2 . The final product of SrTiO 3 /TiO 2− x N x nanorods was obtained after calcining the intermediate. As compared to the TiO 2− x N x nanoparticles, the absorption performance of SrTiO 3 /titanate nanotubes or SrTiO 3 /TiO 2− x N x nanorods was depressed, instead of improving it. The mechanisms of the absorption property changes were discussed. The SrTiO 3 /TiO 2− x N x nanorods presented better photocatalytic activity than the TiO 2− x N x nanoparticles or nanorods. However, due to overmuch adsorption, the SrTiO 3 /titanate nanotubes gave ordinary photocatalytic performances.