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Table 2 The comparison of the previously reported and the present flurescence method for mercury ions

From: Highly Selective and Sensitive Detection of Hg2+ Based on Förster Resonance Energy Transfer between CdSe Quantum Dots and g-C3N4 Nanosheets

Fluorescence sensor Detection limit (nM) Solvent (medium) Sensing mode Reference
Silica particles 100 H2O Ratiomeric [27]
CdTe QDs 1.5 H2O Fluorescence turn off [28]
Tetraphenyborate anion 100 Membrane Fluorescence turn off [29]
Rhodamine derivative 20 H2O Fluorescence turn on [30]
CdS/ZnS QDs 40 H2O Fluorescence turn off [31]
Gold nanorods 500 H2O Absorbance turn off [32]
Mesoporous silica 1000 CH3CN Fluorescence turn on [33]
Mn:CdS/ZnS QDs 0.18 H2O Fluorescence turn on [34]
GO/ Au NPs 25 H2O PET [35]
CdTe QDs/rhodamine B 20.3 H2O FRET [36]
CdTe QDs/g-C3N4 nanosheets 5.3 H2O FRET This work