▎ 摘　　要

NOVELTY - Mass production of sulfur-doped graphene quantum dots (S-GQDs) from sugarcane molasses comprises hydrothermally reacting sugarcane molasses at moderate temperature and autogenous pressure. USE - Method for mass production of sulfur-doped graphene quantum dots used for bioimaging and diagnostic purposes. ADVANTAGE - The process does not use of external doping agent to dope sulfur in graphene quantum dots. The prepared S-GQDs are water-soluble and highly biocompatible, cytocompatible, hemocompatible and histocompatible; possesses high photostability and sustained fluorescence giving average lifetime of 2.9 ns; have lateral size of 2-5 nm, height of 3-5 nm, tunable fluorescence and slow decay time, and high degree of crystallinity as per in plane and basal lattice parameters in X-ray diffraction indicating peaks corresponding 004,100,00; and exhibits graphitic structure and high crystal quality with less crystal defects as exhibited by Raman spectra showing ordered G Band stronger than disordered D band.