Synthesis of Carbon dots-based Fluorescent Probe for the High Selective Detection of Mercury Ions

Li Song; Yanyan Cui

doi:10.20944/preprints201808.0436.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 24 August 2018 / Approved: 24 August 2018 / Online: 24 August 2018 (12:29:30 CEST)

Fluorescent carbon dots (C-dots) were synthesized by one pot hydrothermal treatment of garlic juice at 180 °C for 7h. The as-prepared C-dots with an average diameter of 2.13±0.71 nm can be well dispersed, and show absinthe fluorescence with a quantum yield of 8.9% in water. The C-dots were fully characterized by TEM, XPS, XRD, and FTIR, respectively. Additionally, the as-prepared C-dots reveal nearly nontoxic to SW480 cells and can be used for cell imaging. The water solution of C-dots show sensitivity to pH values and metal ions, and also have a high selectivity to the Hg²⁺ ion among other transition metal ions, and achieve a high sensitive detection with the detection limit of 0.45 μM. The fluorescent C-dots are expected to be useful for the evaluation of mercury ions in environmental water system.

Fluorescent carbon dots, hydrothermal treatment, characterization, cell imaging, mercury ions, selective and sensitive detection

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Synthesis of Carbon dots-based Fluorescent Probe for the High Selective Detection of Mercury Ions

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