Green-emitting carbon quantum dots as a dual-mode fluorescent and colorimetric sensor for hypochlorite.
Anal Bioanal Chem
; 414(8): 2651-2660, 2022 Mar.
Article
em En
| MEDLINE
| ID: mdl-35165778
ABSTRACT
In this work, green-emitting carbon quantum dots were successfully prepared through a facile one-step solid-state reaction method. The obtained green-emitting carbon dots (G-CDs) showed good fluorescence stability in NaCl aqueous solution and different pH values. Moreover, the G-CDs showed high sensitivity and selectivity for detecting hypochlorite by both fluorometry and colorimetry. Under the optimized condition, a highly sensitive detection of hypochlorite was established in the range of 0.2-100 µM and 10-150 µM for fluorescent and colorimetric methods, respectively. The corresponding limits of detection (LOD) were 0.0781 µM and 1.82 µM, respectively. Therefore, the G-CDs were successfully applied to determinate hypochlorite in actual water samples. In addition, a paper-based sensor loading with the G-CDs was also developed for rapid visual detection of hypochlorite. The results suggested that the G-CDs could be a promising candidate to detect hypochlorite.
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MEDLINE
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En
Ano de publicação:
2022
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Article