The main advantage of oxynitride photocatalysts is their ability to utilize visible light, which constitutes a significant portion of solar energy. Traditional photocatalysts like titanium dioxide (TiO₂) are limited to UV light absorption due to their wide bandgap. By contrast, oxynitrides like TaON and LaTiO₂N can harness visible light, making them more efficient for applications such as water splitting and CO₂ reduction.
