Physicochemical Properties of ABiNb2O7 (A = Cs, Rb) Oxides

Abstract

The structure, morphology, and sorption and optical properties of ABiNb₂O₇ layered oxides (A = Rb, Cs) from the Dion–Jacobson phase class, which are important for manifesting their photocatalytic activity, have been studied. The high sorption capacity of the studied oxides with respect to the methylene blue dye (1.12 × 10⁻³ g/g and 1.92 × 10⁻³ g/g) and the range of the intrinsic light absorption (λ < 368 nm) allow them to be used in photocatalytic reactions induced by ultraviolet radiation. This study is aimed at the further identification of the potential piezophotocatalytic activity of the considered oxides, for which ferroelectric properties were previously discovered.