Highly luminescent nitrogen-doped carbon quantum dots as effective fluorescent probes for mercuric and iodide ions

摘要: Nitrogen-doped carbon quantum dots (N-CQDs) with strong blue fluorescence and a high yield of 66.8% were synthesized via facile one-pot hydrothermal treatment ammonium citrate ethylenediamine as nitrogen sources, respectively. The emission is independent the excitation wavelengths very stable in wide pH range. These N-CQDs, dispersed well water other polar solvents, showed highly selective sensitive detection hazardous toxic Hg2+ range 10 nM to 20 μM through quenching process. N-CQDs quenched by exhibited selectivity sensitivity for I− 0.5 40 recovery A possible charge transfer process responsible effective was proposed according UV-vis absorption decay measurements.