Characterizations and Photocatalytic Activities of Nanocrystalline MTiO3 （M = Sr, Pb, Co） Prepared via a General Self-propagating Combustion Method

Nanocrystalline MTiO3 (M=Sr, Pb, Co) were prepared by a general self-pro- pagating combustion method. The samples were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption and UV-vis diffuse reflectance spectra (DRS). The photocatalytic activity of MTiO3 (M=Sr, Pb, Co) was evaluated by the photocatalytic degradation of methyl orange (MO). MTiO3 (M=Sr, Pb, Co) having the same core element showed distinctly different photocatalytic activity due to the different coordinating atoms. Factors affecting the photocatalytic activity of MTiO3 (M=Sr, Pb, Co) were discussed. It was suggested that the structures of TiO6 octahedra and the electronic property were the predominant factors of the photocatalytic behavior for MTiO3 (M=Sr, Pb, Co).更多还原