Sillén–Aurivillius-related Oxychloride Bi6NbWO14Cl as a Stable O2-evolving Photocatalyst in Z-scheme Water Splitting under Visible Light
Following the recent discovery of a Sillen–Aurivillius perovskite Bi4NbO8Cl with a stable photocatalytic activity for water oxidation under visible light, we studied a structurally related intergrowth compound Bi6NbWO14Cl. It also works as a stable O2-evolving photocatalyst in a Z-scheme water splitting system, but has a slightly wider band gap than that in Bi4NbO8Cl. These results suggest the importance of the Sillen–Aurivillius framework, offering possible band gap tuning by varying structural motifs and their sequence in the Sillen–Aurivillius-related systems.