Abbasali Arabi - Department of Chemistry, University of Semnan, Semnan, Iran
Mostafa Fazli - Department of Chemistry, University of Semnan, Semnan, Iran
Mohammad Hosein Ehsani - Department of Physics, University of Semnan, Semnan, Iran

calcium doped lanthanum manganite (LCMO) nanostructure was synthesized via the mild hydrothermal method. Properties of materials were characterized by X-ray diffraction, Fourier Transform Infrared Spectroscopy, Field Emission Scanning Electron Microscopy and UV–vis spectroscopy. The results of XRD and FTIR analyses show that the as-prepared material is composed of single-phase structure without impurity and nanorod morphology with a mean diameter of 126.8 nm. The LCMO composition has a band gap of 1.83 eV that indicating its capability as a photocatalyst under visible light irradiation. The anionic Reactive Black 5 (RB5) dye solution was considersd as a model ofwastewater [1, 2] to study the photocatalytic activity of LCMO nanostructure under visible light irradiation. The results of the degradation of RB5 by the heterogeneous photocatalytic reaction show that, over a period of 90 minutes, near to 80% of RB5 is degradated, and the overall reaction rate is first order and is equal to 0.016 min-1.

photocatalytic degradation, Reactive Black 5, nanomanganite, La0.7Ca0.3MnO3