Calcium-Induced Photoluminescence Quenching of Graphene Quantum Dots in Hard Water: A Quick Turn-Off Sensing Approach

摘要

The photoluminescence of graphene quantum dots (GQD) is widely explored for sensory applications. Among various metal ions to be detected in aqueous bodies, Ca2+ ions are often neglected which is evident from the lack of literature. However, owing to booming industrialization, the available potable water is mostly crossing the prescribed hardness limits. Presented report summarize the synthesis of GQD via modified hydro- thermal cutting of graphene oxide, which was further em- ployed for sensing Ca2+ ions in hard water samples.