Nitrogen doped carbon nanodots as fluorescent probes for selective detection and quantification of Ferric(III) ions

Suk, Fun Chin and Tan, Shao-Chien and Suh, Cem Pang and Ng, Sing-Muk (2017) Nitrogen doped carbon nanodots as fluorescent probes for selective detection and quantification of Ferric(III) ions. Optical Materials, 73. pp. 77-82. ISSN 0925-3467

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Abstract

Nitrogen (N) doped carbon dots (N-CDs) that showed blue fluorescence with quantum yield (QY) of 12.25% were synthesized by one step microwave irradiation of lysine in ortho-phosphoric acid at 1000 W for 5 min. The as-synthesized N-CDs were successfully explored as fluorescent probes for selective detection of ferric (Fe3+) ions in aqueous condition with a linear range from 0.2 to 5.0 mM and a detection limit of 0.074 mM ± 0.081 (S/N = 3). The N-CDs exhibited high selectivity towards the detection of Fe3+ ions even in the presence of interfering ions. The N-CDs also demonstrated the potential of practical application for determining of Fe3+ ions concentration in real samples with high recovery rate and low relative standard deviation error.

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