Structural, Optical and Magnetic Properties of Cobalt Ferrite Nanomaterials, Synthesized by a Green Technological Approach Using Lemon Juice

Abstract

AbstractGreen synthesis of nanomaterials is considered to be the cost-effective and eco-friendly method of synthesis. With the intention to use green synthesis approach, CoFe2O4 nanoparticles were successfully prepared using lemon juice and metal nitrates as a precursor material. The synthesized ceramics were structurally characterized by XRD and cubic structure was identified with crystallite size of 41 nm, approximately. SEM was used to see the surface morphology of prepared samples, which revealed agglomerated grain distribution. FTIR spectroscopic analysis confirmed the existence of Fe–O, Co–O, etc. vibration bands. Direct band gap was evaluated using UV–Vis spectroscopy, where it was measured equal to 3.65 eV using Tauq equation A broad and strong emissions between 457 and 493 nm (predominantly blue emission) was observed during photoluminescence studies. The magnetic parameters like coercivity displayed systematic increase with rise in annealing temperature. The saturation magnetisation (Ms) found significant improvement with annealing temperature. The present research study opens a new window that large production of Cobalt ferrite nanomaterial using green approach can be produced for various applications.KeywordsGreen synthesisNanoparticleCobalt ferriteOptical propertiesMagnetic properties