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Abstract
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Graphene quantum dots (GQDs) have attracted increasing attention due to their unique
properties such as high-water solubility, photoluminescence activity, good biocompatibility,
physical, chemical, and electrical properties which makes them appropriate candidates for use
in a variety of bio applications, sensors, and photocatalysts [1]. The synthesis of quantum dot
graphene was carried out by hydrothermal method, and citric acid was used as a precursor to
carbon as well as urea. Nanocomposites made from Cu (NO3)2⋅3H2O and Mn (NO3)2⋅4H2O
accelerate and improve pollutants such as paint by doping on quantum dot grapheme [2].
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