CsTaO2N

CsTaO2N is an oxynitride ceramic compound combining cesium, tantalum, oxygen, and nitrogen into a single-phase material. This is a research-level compound belonging to the family of metal oxynitrides, which are engineered to combine properties of oxides (thermal stability, hardness) with those of nitrides (electronic conductivity, band gap tunability). CsTaO2N and related oxynitrides are primarily investigated for photocatalytic applications—particularly visible-light-driven water splitting and pollutant degradation—because the nitrogen incorporation narrows the band gap compared to pure oxide phases. While not yet in widespread commercial production, these materials represent an active research direction for sustainable energy and environmental remediation, offering potential advantages over titanium dioxide-based photocatalysts in terms of band gap engineering and absorption range.