The influence of rare earth doping on the structure, magnetic properties, and application of LaFeO3 nanoparticles
Year: 2025
Type: article
Abstract: The perovskites La1-xRxFeO3 (x = 0.0 and 0.1; M: Sm3+ and Gd3+) were synthesized using the citrate method. The X-ray diffraction reveals that the samples were prepared in a single phase orthorhombic structure with an average crystallite size of 42–46 nm. The field emission scanning electron microscope studied the morphology of La1-xRxFeO3 perovskites and indicated the presence of pores on the surface of nanoparticles. The magnetization of LaFeO3 has a strong effect on the doping La3 + site by Sm3+ and Gd3+ ions. The saturation magnetization increased from 0.57 emu/g for LaFeO3 to 1.27 emu/g for La0.90Sm0.10FeO3; while, the remnant magnetization decreased from 0.111 emu/g for LaFeO3 to 0.026 emu/g for La0.90Gd0.10FeO3. The samples have antiferromagnetic with weak ferromagnetic properties. The presence of Sm3+ and Gd3+ ions at the expense of La3+ leads to tilting the FeO6 octahedron and increasing the canting angle between Fe3+ –O2–Fe3+. The La1-xRxFeO3 nanoparticles have a good removal efficiency for removing highly toxic Cr6+ ions from water using a low-cost and eco-friendly adsorption method. The removal efficiency of La0.90Gd0.10FeO3 is 88.2% at pH 5. The Langmuir model is the best fit model with the experimental data.
Author: M. M. Arman
Institution: Cairo University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,890
Funder: Cairo University
OpenAlex ID: W4408330603