Enhanced Magnetic and Optical Behavior of Ferrite Nanoparticles: Development and Potential Applications
Keywords:
Ferrite nanoparticles, Magnetic properties, Optical band gap, Sol-gel synthesis, Spinel structureAbstract
Ferrite nanoparticles (MFe₂O₄, where M = Co, Ni, Mn, Zn, etc.) have emerged as promising materials for
various technological applications due to their unique magnetic and optical properties. This study
systematically investigates the synthesis, characterization, and applications of spinel ferrite nanoparticles
through sol-gel and co-precipitation methods. The primary objectives include optimizing synthesis parameters
to enhance magnetic saturation (Ms), reducing optical band gap for visible light applications, and evaluating
potential biomedical and photocatalytic applications. Synthesis was performed at controlled temperatures (500
800°C) using chemical co-precipitation and sol-gel techniques. Our hypothesis suggested that doping with
transition metals would enhance both magnetic and optical properties. Results demonstrated that cobalt ferrite
nanoparticles achieved the highest saturation magnetization of 84.01 emu/g with coercivity of 2109 Oe, while
nickel ferrite showed optimal optical band gap of 1.27 eV. XRD analysis confirmed cubic spinel structure with
crystallite sizes ranging from 12-70 nm. Statistical analysis revealed significant correlations between synthesis
temperature and magnetic properties (R² = 0.95). The enhanced properties make these nanoparticles suitable
for magnetic hyperthermia, drug delivery, photocatalysis, and electromagnetic applications. These findings
contribute to the development of next-generation magnetic nanomaterials for sustainable technological
solutions.
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