Structural Features of La0.55Ca0.45A0.50Co0.50O3 (A=Mg, Mn) Nanoparticles Over Photo-Degradation of Methyl Blue
الموضوعات : Journal of NanoanalysisHamid Yousefi 1 , Ahmad Gholizadeh 2 , Zahra Mirbeig Sabzevari 3 , Azim Malekzadeh 4
1 - School of Physics, Damghan University (DU), Damghan, Islamic Republic of Iran
2 - School of Physics, Damghan University (DU), Damghan, Islamic Republic of Iran
3 - School of Chemistry, Damghan University (DU), Damghan. Iran
4 - School of Chemistry, Damghan University (DU), Damghan. Iran
الکلمات المفتاحية: nanoparticles, Structural Properties, UV-Visible, Cobaltite Perovskite, Photo-Degradation,
ملخص المقالة :
In this paper, La0.55Ca0.45A0.5Co0.5O3(A=Mg, Mn) nanoparticles were synthesized by citratemethod. The samples were characterized using the techniques of using X-ray diffraction(XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and UVVisspectroscopy. The structure was analyzed by Rietveld fitting of the XRD pattern by usingX’Pert package and Fullprof program, these shows that the samples have perovskite structure.The calculated values of crystallite size, particle size and band gap energy of La0.55Ca0.45Mg0.5Co0.5O3 are much less than La0.55Ca0.45Mg0.5Co0.5O3. The effects of three operational parametersincluding irradiation time, pH, and the catalyst amount on the photocatalytic activity ofthe product on the degradation of methyl blue (MB) under solar condition were studied. Thephotocatalytic degradation efficiency of MB solution over La0.55Ca0.45Mn0.5Co0.5O3 nanoparticlesis higher than that over La0.55Ca0.45Mg0.5Co0.5O3 nanoparticles. 96 % degradation is obtainedin an aqueous solution at pH=2.33 and containing 30 mg La0.55Ca0.45Mg0.5Co0.5O3 catalystafter 30 minutes.
