Green Synthesis of Water-Soluble Graphene Quantum Dots from Cotton Cellulose

This work presents a sustainable and eco-friendly method for synthesizing graphene quantum dots (GQDs) using cotton cellulose as the precursor. The hydrothermal process employs cellulose and water as the sole components, avoiding strong acids and organic solvents. The mechanism involves hydrolysis of cellulose to glucose, followed by cyclic condensation to form GQDs. The resulting GQDs exhibit uniform size (۱.۰–۵.۰ nm), high photoluminescence (PL) efficiency, favorable hydrophilicity, low cytotoxicity, and excellent biocompatibility. These properties make them promising for bioimaging applications. This study highlights a renewable pathway for GQD synthesis, addressing challenges of conventional methods, including environmental impact and material cost.

کلیدواژه ها:

Graphene Quantum Dots ، Green Synthesis ، Cotton Cellulose ، Hydrothermal Process ، Bioimaging