Brain-like cobalt manganese oxide nano-composites coated on glass surface for enhanced photocatalytic degradation of Black Nilusun: effect of precursors on properties

作者：Habibi Mohammad Hossein; Bagheri Payman

来源：Journal of Materials Science: Materials in Electronics , 2017, 28(2): 1522-1530.

DOI：10.1007/s10854-016-5691-y

Brain-like cobalt manganese oxide nano-composites were effectively synthesized using co-precipitation processes. The effects of nitrate, sulfate and acetate of Co and Mn as precursors on structural, optical, thermal and morphological properties of cobalt manganese oxide nanocomposites solid were studied by means of thermal analyses (TG-DTG), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), fourier transform infrared spectroscopy (FTIR) and energy dispersive X-ray spectroscopy. The XRD results showed that the average particle size of cobalt manganese oxide nano-composites prepared from nitrate (MnCoNC-1), sulphate (MnCoNC-2) and acetate (MnCoNC-3) precursors were found to be 9, 12 and 13 nm respectively with MnCo2O4 and MnCo2O4.5 phases. The synthesised nanocomposites composed of spheres with brain-like structure are seen from FESEM results. The incorporation of cobalt into the manganese oxide structure is revealed by the distinctive FTIR transitions of Co-O-Mn vibrations. The characteristic band-gap energies of the different composites are estimated to be between 3.0 and 5.1 eV from UV reflection (DRS) spectra. Cobalt manganese oxide nano-composites coated on glass can effectively mineralize 92 % of azo textile dye within 3 h irradiation. The distinct properties and remarkable photocatalytical activities suggest the brain-type cobalt manganese oxide nano-composites are a promising material for enhanced photocatalytic degradation of Black Nilusun. The excellent photocatalytic activity may be due to the enhanced photo-induced charge separation brought on by the formation of coupling of two oxides in composite.

• 出版日期2017-1