Abstract
The relevance of this work is to evaluate doping of Fe3O4 nanoparticles with gadolinium and neodymium to obtain nanocomposites of GdFeO3/Fe2O3 and NdFeO3/Fe2O3 types, as well as determining purification efficiency of aqueous media by absorbing manganese by the obtained nanocomposites. The main method for preparing nanocomposites was a combination of chemical synthesis of Fe3O4 nanoparticles with their subsequent mechanochemical grinding with Nd2O3 or Gd(NO3)3 powders and thermal annealing at 1000 °C. As a result of the performed synthesis experiments, nanocomposites of the GdFeO3/Fe2O3 and NdFeO3/Fe2O3 types with a spinel type of structure and a high content of GdFeO3 and NdFeO3 phases were obtained. The size of the synthesized composites, consisting of spherical or cubic nanoparticles, varied from 50 to 70 nm. According to the data obtained for assessment of manganese ions absorption efficiency by synthesized nanocomposites in comparison with undoped annealed nanoparticles of hematite Fe2O3, it was found that the efficiency of nanocomposites GdFeO3/Fe2O3 and NdFeO3/Fe2O3 was 69.5 and 84.1%, respectively. At the same time, GdFeO3/Fe2O3 and NdFeO3/Fe2O3 nanocomposites showed higher stability indicators of maintaining the absorption efficiency during long-term successive tests in comparison with hematite nanoparticles.
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This study was funded by the Ministry of Education and Science of the Republic of Kazakhstan (Grant AP09259184).
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Kozlovskiy, A.L., Egizbek, K., Prmantayeva, B.A. et al. Effect of various dopants on structural properties of Ax@Fe2-xO3 (A = Nd, Gd) nanocomposites. J Mater Sci: Mater Electron 32, 21670–21676 (2021). https://doi.org/10.1007/s10854-021-06685-w
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DOI: https://doi.org/10.1007/s10854-021-06685-w