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High quantum yield aminophenylboronic acid-functionalized N-doped carbon dots for highly selective hypochlorite ion detection. | LitMetric
High quantum yield 3-aminophenylboronic acid-functionalized nitrogen-doped carbon dots (GAAP-CDs) were fabricated using a simple hydrothermal route and used as a sensing probe for toxic hypochlorite (ClO). The as-synthesized GAAP-CDs showed absorption peaks at 252, 297, and 370 nm and an emission peak at 375 nm with an excitation wavelength of 310 nm. The quantum yield of GAAP-CDs reached 58.28%, with no noticeable fluorescence change observed under high ionic strength conditions and a three-month long-term test. GAAP-CDs-based ClO sensing was carried out by UV-vis absorbance and fluorescence spectroscopy; the detection limit was as low as 0.77 μM (linear range of 0-100 μM), and 0.50 μM (linear range of 0.1-100 μM), respectively. In addition, the as-synthesized GAAP-CDs showed excellent selectivity towards ClO ions in the presence of various interfering chemicals. The satisfactory results from the proposed method of ClO detection in tap water and drinking water samples, suggesting promising application of GAAP-CDs for ClO detection.
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