Structural features of La0.55Ca0.45A0.50Co0.50O3 (A = Mg, Mn) nanoparticles over photo-degradation of methyl blue

Journal of Nanoanalysis

مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 25 آبان 1396

نوع مقاله: Original Research Paper

شناسه دیجیتال (DOI): 10.22034/jna.2017.542780.1024

نویسندگان

Hamid Yousefi¹؛ Ahmad Gholizadeh^{* 1}؛ Zahra MirbeigSabzevari²؛ Azim Malekzadeh³

¹School of Physics, Damghan University (DU), Damghan, Islamic Republic of Iran

²School of Chemistry, Damghan University (DU), Damghan, Islamic Republic of Iran

³School of Chemistry, Damghan University (DU), Damghan, , Islamic Republic of Iran

چکیده

La0.55Ca0.45A0.5Co0.5O3(A = Mg, Mn) nanoparticles prepared by citrate method were characterized using X-ray diffraction measurement, transmission electron microscopy, Fourier transform infrared and UV-Vis spectroscopy. The structural analysis using X’Pert package and Fullprof program is an evidence for the presence of the perovskite structure. The calculated value of crystallite size, particle size and band gap energy of La0.55Ca0.45Mg0.5Co0.5O3 is much less than La0.55Ca0.45Mg0.5Co0.5O3. The photocatalytic activity of the product was studied for degradation of an aqueous solution of methyl blue under solar condition. The effects of three operational parameters including irradiation time, pH, and the catalyst amount on the dye degradation were analyzed using optical absorption spectra. The degradation efficiency of MB solutions in the presence of 10 mg La0.55Ca0.45Mn0.5Co0.5O3 nanoparticles under visible light indicate to be higher than La0.55Ca0.45Mg0.5Co0.5O3 nanoparticles. 96 % degradation is obtained in an aqueous solution at pH = 2.33 and containing 30 mg La0.55Ca0.45Mg0.5Co0.5O3 catalyst after 30 minutes.

کلیدواژه‌ها

nanoparticles؛ Cobaltite Perovskite؛ Structural Properties؛ UV-Visible؛ Photo-Degradation