Synthesis of carbon dots from tea powder waste

Tea waste is inexpensive, easily available and sustainable carbonaceous source. The carbon derived from tea powder waste can be used for variety of applications. Carbon dots (CDs) are derived from this carbon. CDs are zero-dimensional carbon-based materials in the size range of a few tens of nano meters and can be doped with N, S, P, and B heteroatoms. They are chemically modifiable to enhance and render some additional functional properties. In this work carbon dots are synthesized from tea powder waste by carbonization method. The CDs are identified by exposing the liquid obtained from carbonization method to ultraviolet light. Carbon dots have shown quality result of photo luminescence under UV radiation.