Photocatalytic degradation of Reactive Black-5 Dye (RB5) from Aqueous Solution by calcium doped lanthanum manganite under visible light irradiation

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.

کلیدواژه ها:

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