What are the Synthesis Methods for Oxynitride Photocatalysts?
Several methods are employed to synthesize oxynitride photocatalysts. One common approach is the nitridation of oxide precursors under an ammonia atmosphere at high temperatures. Another method involves solid-state reactions between oxides and nitrides. Recently, more advanced techniques such as sol-gel processes and hydrothermal synthesis have also been explored to achieve better control over the material properties.