One- pot facile synthesis of nitrogen doped graphene quantum dots based on N',۲-dihydroxyethanimidamide and citric acid

Graphene quantum dots (GQDs) are tiny segments of graphene whose electron mobility is confined in all three dimensions. Graphene is a ۰-bandgap semiconductor possessing an infinite exciton Bohr diameter. Therefore, quantum confinement is evident in all graphene fragments. The GQDs are usually under ۲۰ nm in dimensions. We report a facile hydrothermal method for synthesis of graphene quantum dots contains nitrogen atoms (N-GQDs). This study shows interaction between citric acid (CA) and N',۲-dihydroxyethanimidamide (DHAA) in which N-doped graphene quantum dots were synthesized. Due to use of DHAA that has two active sites, synthesized N-GQDs have special morphology, fluorescence and viscosity. Compared with other nitrogen compounds that is necessary for N-GQDs synthesis, DHAA is much more suitable due to low toxicity and stability. Synthesized N-GQDs were identified by FT-IR, XRD, TGA and fluorescence.

کلیدواژه ها:

N' ، ۲-dihydroxyethanimidamide ، Nitrogen doped ، Graphene quantum dot ، One- pot synthesis