The Effect of SrO Impregnation on the Characteristics of Cobalt Ferrite (CoFe2O4) Nanoparticles Synthesized by Coprecipitation

Abstract

Cobalt Ferrite (CoFe2O4) nanoparticles are magnetic materials that have greater hardness than Fe3O4. CoFe2O4 is widely applied in many fields, including as a heterogeneous catalyst in various chemical reactions such as photocatalysis, phenol degradation, and transesterification reactions. This is supported by the thermal and chemical stability possessed by CoFe2O4. Coating or impregnation of non-magnetic material on the surface of the ferrite, on one side will reduce its magnetism and possibly its surface area. But on the other hand, the positive impact of coating or impregnation is the increase in particle monodispersity. Weakening the magnetism of the particles will reduce the interaction of attraction between particles, so that the particles are getting more monodisperse. This will optimize its potential as a heterogeneous catalyst. In this research impregnation of strontium oxide (SrO) would be carried out on the surface of CoFe2O4. After that, the characters were compared with CoFe2O4 before being impregnated. The CoFe2O4 synthesis was carried out through the coprecipitation method, followed by wet impregnation with SrO. The results showed that the impregnation of SrO on CoFe2O4 increased the zeta potential of the particles which indicated the stability of the particles in the dispersion.