Carbon Quantum Dot (CQD)-Based Composite Fluorescent Hydrogel for the Isolation and Determination of Iron (III).
In: Analytical Letters, Jg. 57 (2024-06-15), Heft 10, S. 1595-1610
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Zugriff:
Carbon quantum dots (CQDs) were derived from saponin and introduced into polyacrylamide hydrogel to prepare a novel bifunctional material (CQDs@HG). This hydrogel emitted strong blue fluorescence under ultraviolet light (365 nm) and exhibited stable adsorption and detection of iron(III) in water samples. The morphological characteristics, chemical composition, Fe 3+ adsorption performance, and optical properties of CQDs@HG were characterized. Depending upon the Fe 3+ concentration, CQDs@HG exhibited different quenching effects to allow Fe 3+ determination. The limit of detection was 0.115 μM, and the adsorption was as high as 12.13 mg/g. The mechanism was due to both static and dynamic quenching. Notably, the sensor based on CQDs@HG successfully determined Fe 3+ in water samples, with spiked recoveries between 95.32% and 103.11%. When combined with software image analysis, the sensor semi-quantitatively determined Fe 3+ in the field. This fluorescent hydrogel provides a reference for constructing portable sensors for monitoring hazardous substances in water. [ABSTRACT FROM AUTHOR]
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Titel: |
Carbon Quantum Dot (CQD)-Based Composite Fluorescent Hydrogel for the Isolation and Determination of Iron (III).
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Autor/in / Beteiligte Person: | Yin, Yongzheng ; Lu, Huanhuan ; Song, Weijun ; Hu, Xiaofeng ; Sun, Chunyan |
Zeitschrift: | Analytical Letters, Jg. 57 (2024-06-15), Heft 10, S. 1595-1610 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0003-2719 (print) |
DOI: | 10.1080/00032719.2023.2262631 |
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