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<p>A series of Ni and Ce co-doped magnesium ferrite nano materials with composition Mg<sub>1−x</sub>Ni<sub>x</sub>Ce<sub>y</sub>Fe<sub>2−y</sub>O<sub>4</sub> (where y = x= 0.00, 0.025, 0.050, 0.075 and 0.1) were synthesized via a low temperature citrate gel auto combustion method. The PXRD (powder X-ray diffraction) confirmed single phase spinel structures with crystalline size in the ranges of 20.16&#xa0;nm to 25.28&#xa0;nm. The morphological studies and particle size distribution of the materials examined by scanning electron microscope. The samples spinel structure verified by FTIR absorption bands at both sites tetrahedral and octahedral. The optical band gap energies varied from 1.705 to 2.191&#xa0;eV, with the minimum value (1.705&#xa0;eV) observed for Mg<sub>0.925</sub>Ni<sub>0.075</sub>Ce<sub>0.075</sub>Fe<sub>1.925</sub>O<sub>4</sub> indicating enhanced visible absorption. Magnetic measurements showed ferrimagnetic behaviour with saturation magnetization decreased from 15.35 to 10.42 emu/g with increasing dopant content. The photocatalytic activity was investigated through organic effluents methylene blue and acid red and the results demonstrated that Mg<sub>0.95</sub>Ni<sub>0.05</sub>Ce<sub>0.05</sub>Fe<sub>1.95</sub>O<sub>4</sub> showed the highest degradation activity, reaching about 50% after 75&#xa0;min for acid red. Dielectric properties like AC conductivity, Dielectric constant and impedance spectrum were analysed by LCR meter at various temperature and frequencies. The scientific novelty of this research lies in the systematic incorporation of Ni and Ce ions into the MgFe<sub>2</sub>O<sub>4</sub> lattice, providing a new strategy for tailoring the physicochemical properties of magnesium nanoferrites.</p>

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Electrical, Magnetic, Photocatalytic, and Structural Properties of Ni and Ce Substituted Magnesium Nano Ferrites: A Citrate Gel Auto-Combustion Approach

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Bathini Srinivas,
  • Marri Pradeep Kumar,
  • Savita Belwal,
  • Koteswararao P,
  • D. Ravi Kumar

摘要

A series of Ni and Ce co-doped magnesium ferrite nano materials with composition Mg1−xNixCeyFe2−yO4 (where y = x= 0.00, 0.025, 0.050, 0.075 and 0.1) were synthesized via a low temperature citrate gel auto combustion method. The PXRD (powder X-ray diffraction) confirmed single phase spinel structures with crystalline size in the ranges of 20.16 nm to 25.28 nm. The morphological studies and particle size distribution of the materials examined by scanning electron microscope. The samples spinel structure verified by FTIR absorption bands at both sites tetrahedral and octahedral. The optical band gap energies varied from 1.705 to 2.191 eV, with the minimum value (1.705 eV) observed for Mg0.925Ni0.075Ce0.075Fe1.925O4 indicating enhanced visible absorption. Magnetic measurements showed ferrimagnetic behaviour with saturation magnetization decreased from 15.35 to 10.42 emu/g with increasing dopant content. The photocatalytic activity was investigated through organic effluents methylene blue and acid red and the results demonstrated that Mg0.95Ni0.05Ce0.05Fe1.95O4 showed the highest degradation activity, reaching about 50% after 75 min for acid red. Dielectric properties like AC conductivity, Dielectric constant and impedance spectrum were analysed by LCR meter at various temperature and frequencies. The scientific novelty of this research lies in the systematic incorporation of Ni and Ce ions into the MgFe2O4 lattice, providing a new strategy for tailoring the physicochemical properties of magnesium nanoferrites.