TeO2, or tellurium dioxide, is a chemical compound composed of the elements tellurium and oxygen. It appears as a white or yellowish powder and is primarily used in the production of ceramics, glass, and as a semiconductor material. TeO2 has unique optical properties, making it valuable in the field of photonics. In addition to its industrial applications, TeO2 is also studied for its potential use in sensors and catalysts. Its ability to form various crystalline structures allows for diverse applications in electronics and materials science. Researchers continue to explore its properties for innovative uses in technology.