Study on preparation and characterization of orthorhombic euxenite-type solid solutions between TbNbTiO₆ and DyNbTiO₆

抄録

This present study focuses on the synthesis and characterization of orthorhombic niobate compounds, including TbNbTiO₆ and DyNbTiO₆, as well as their solid solutions. These solid solutions were synthesized by substituting Dy³⁺ for Tb³⁺ in a high-temperature solid-state reaction, while maintaining a stoichiometric atomic ratio. The study has identified the solid solution range as well. X-ray diffraction (XRD) analyses of all synthesized compounds revealed that their crystal structures exhibit an orthorhombic system within the Pbcn space group. Additionally, scanning electron microscopy (SEM) was employed for surface morphology assessments, and UV–visible diffused reflectance spectroscopy (DRS) was used for band gap assessments. Furthermore, electronic properties, such as the band structure and density of states, were computationally elucidated. The study also delved into the photocatalytic properties of the materials.