BiTiO2N

BiTiO₂N is an oxynitride semiconductor compound containing bismuth, titanium, oxygen, and nitrogen elements. It belongs to the family of visible-light-active photocatalytic materials, developed primarily for research applications where conventional wide-bandgap semiconductors (like TiO₂) are too inactive under visible light. This material is of interest in photocatalysis and environmental remediation because the nitrogen doping narrows the bandgap compared to pure titania, enabling absorption of visible wavelengths rather than requiring ultraviolet excitation—a key advantage for solar-driven applications and cost-effective water treatment systems.