Synthèse et caractérisation physicochimique des oxydes de structure spinelle

In summary, ZFO nanocomposites with varying Ni dopants were successfully synthesized using auto-combustion followed by the annealing process. XRD revealed the formation of zinc ferrites crystallites with cubic spinel structure. The morphology of different zinc ferrites was evaluated using SEM. The degradation rate of MB solution increases successively with Ni doping up to 30% and thereafter decreases. With an optimum Ni doping (30%), photocatalytic activity up to 98% was achieved with as-synthesized ZFO nanocomposites, which can perform as an environmentally friendly, easily isolable, and recyclable photocatalyst for water treatments.
Moreover, the non-annealed YFO nanomaterials with varying Cu dopants were successfully synthesized using the auto-combustion process. XRD revealed the formation of Yttrium ferrites crystallites with orthorhombic Perovskite structure. The morphology of different YFO nano-oxides was evaluated using SEM. The degradation rate of MB solution was investigated under UV and Visible light and the highest degradation efficiency was 95% for 20% Cu doping percentage. The reusability of the photocatalyst was achieved up to the third cycle.