Author/Authors :
Prakash Naik, Jaya Department of Chemistry, India , Sutradhar, Prasanta Department of Chemistry, India , Saha, Mitali Department of Chemistry, India
Abstract :
Graphene quantum dots (GQDs) as a new series
of nanomaterials have drawn great attention in recent years
owning to their unique properties. Here we report the single-
step synthesis of GQDs using pyrolysis of citric acid
which produced GQDs at different pH. The effect of different
pH was studied in detail to optimize the conditions
of the formation of GQDs. UV–Visible absorption and
normalized fluorescence spectra were applied to analyze
the optical properties of GQDs. The particle size distribution
of the GQDs in case of varying pH was determined to
optimize the synthesis conditions. The surface morphology
and microstructures were studied by atomic force microscope
(AFM).
Keywords :
Citric acid , Pyrolysis , Particle size distribution , GQDs