New Insights in the Fabrication of Cobalt Chromite (CoCr2O4) Nanoparticles and Their Multifunctional Applications- A Review

Abstract

Cobalt chromite nanoparticles (CoCr₂O₄ NPs) have emerged as an engrossing material class because of their wide range of uses spanning catalysis, magnetic recording, biomedical engineering, and environmental remediation. This review has addressed all the available literature and described the synthetic strategies, characteristics, and applications of imminent CoCr₂O₄ NPs. Various synthesis techniques, including sol-gel, hydrothermal, co-precipitation, sonochemical methods, and many more, are discussed, along with their influence on nanoparticle size, shape, and phase purity. Cobalt chromite finds diverse applications, serving as an industrial inorganic pigment, a substrate for film growth in dye processes, a solar absorber, a material exhibiting multiferroic properties, an electrode in solid oxide fuel cells (SOFCs), dye degradation, a gas sensor, catalyst support, and a catalyst for various reactions such as the catalytic combustion of dichloromethane, the complete oxidation of trichloroethylene (used to eliminate chlorinated organic pollutants), ortho-selective alkylation of phenol with methanol, complete oxidation of methane, and diesel soot removal, and the oxidation of 2-propanol. We are confident that this review will be a valuable resource for researchers interested in the production and diverse uses of CoCr₂O₄ nanoparticles.