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Transforming waste into value: pomelo-peel-based nitrogen-doped carbon dots for the highly selective detection of
Haiyan Qi1, Demin Huang1, Jing Jing2
1College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang Province 161006 China qhy120@sina.com.
Abstract:
Tetracycline (TC) is widely used as a veterinary drug, and its residue in livestock products could enter the human body and cause damage. In this study, we developed an eco-friendly approach that utilized pomelo peel as a carbon source to synthesize new water-soluble N-doped carbon dots (P-NCDs) with blue fluorescence, obtaining a high quantum yield of up to 76.47% and achieving the goal of turning waste into value. Our prepared P-NCDs can selectively recognized TC, and their fluorescence was quenched based on the IFE. P-NCDs could measure the TC concentration in the linear range of 0-100 μmol L-1 with a detection limit (LOD, S/N = 3) as low as 0.045 μmol L-1. Furthermore, we have successfully applied our P-NCDs to the detection of TC in milk samples with convincing results within 90 s. Overall, our newly synthesized fluorescent sensor, P-NCDs, demonstrated huge potential to become an alternative way to detect TC in a simple, efficient, sensitive way without using any special instruments.
