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Abstract Solid solutions CsTe0.54+(Te1.5-x6+Mox)O6 (x = 0.875–1.06), RbTe0.54+(Te1.5-x6+Mox)O6 (x = 0.5–0.75), CsTe0.54+(Te1.5-x6+Wx)O6 (x = 0.13–0.55) and RbTe0.54+(Te1.5-x6+Wx)O6 (x = 0.25–0.63) with cubic β-pyrochlore structure have been synthesized by solid-state reaction. The elemental composition was confirmed by X-ray microanalysis.… Click to show full abstract
Abstract Solid solutions CsTe0.54+(Te1.5-x6+Mox)O6 (x = 0.875–1.06), RbTe0.54+(Te1.5-x6+Mox)O6 (x = 0.5–0.75), CsTe0.54+(Te1.5-x6+Wx)O6 (x = 0.13–0.55) and RbTe0.54+(Te1.5-x6+Wx)O6 (x = 0.25–0.63) with cubic β-pyrochlore structure have been synthesized by solid-state reaction. The elemental composition was confirmed by X-ray microanalysis. The crystal structure changings in the area (Cs, Rb)Te0.54+(Te1.5-x6+Mx)O6 at x = 0–1.5 were investigated, and more suitable structure model of β-pyrochlore have been presented. The relative positions of valence band and conduction band edges were determined by UV–vis transmittance spectra and X-ray photoelectron spectroscopy analysis for β-pyrochlores CsTeMoO6, RbTe1·25Mo0·75O6, CsTe1·625W0·375O6 and RbTe1·5W0·5O6. So, they can be applied as visible-light-responsive photocatalysts for the decomposition of organic pollutants, dye molecules and water with producing hydrogen.
Journal Title: Journal of Solid State Chemistry
Year Published: 2021
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