Chemiluminescence of carbon dots under strong alkaline solutions: a novel insight into carbon dot optical properties
Lixia Zhao(Chinese Academy of Sciences), Di Fan(Research Center for Eco-Environmental Sciences), Da-Bin Wang(Research Center for Eco-Environmental Sciences), Liang‐Hong Guo(Chinese Academy of Sciences), Yu Yang(Research Center for Eco-Environmental Sciences), Bin Wan(Chinese Academy of Sciences), Hui Zhang(Research Center for Eco-Environmental Sciences)
Cited by 160
Abstract
We report the surprising chemiluminescence (CL) behavior of fluorescent carbon dots in the presence of a strong alkaline solution, such as NaOH or KOH. The CL intensity was dependent on the concentration of the base and carbon dots in a certain range. A possible CL mechanism was studied by UV-Vis, fluorescence, CL, FTIR, XPS and EPR spectroscopy. Radiative recombination of the injected electrons by "chemical reduction" of carbon dots with thermally excited generated holes was proposed, which sheds new light on the characteristics of carbon dots.
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