A novel carbon dot-based degradable pre‑formed particle gel for sensitive detection of iron ions
Degradable fluorescent sensors that can avoid the secondary contamination are highly ideal for the detection of heavy metal ions, aligning with the sustainable development principle, thus becoming the subject of considerable interest. In this work, a carbon dot-based self-degradable pre‑formed parti...
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Published in | Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 711; p. 136414 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
20.04.2025
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Subjects | |
Online Access | Get full text |
ISSN | 0927-7757 |
DOI | 10.1016/j.colsurfa.2025.136414 |
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Summary: | Degradable fluorescent sensors that can avoid the secondary contamination are highly ideal for the detection of heavy metal ions, aligning with the sustainable development principle, thus becoming the subject of considerable interest. In this work, a carbon dot-based self-degradable pre‑formed particle gel (CDs@DPPG) was successfully synthesized by one-step free radical polymerization with green fluorescence-emitted carbon dots as fluorescence probes, acrylamide (AM) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) as monomers and 1,6-hexanediol diacrylate (HDDA) as crosslinkers. Results show that CDs@DPPGs exhibit a significant quenching response, good selectivity, and fast response to Fe3+. Specifically, this gel can spontaneously degrade to a liquid with the viscosity of ca. 2.7 mPa s at a certain temperature, resulting from the presence of the thermodegradable HDDA, which is beneficial for the subsequent processing after the test. Here, the porous network structure of the CDs@DPPG provides not only a large number of active sites but also the enhanced ion transport channels, thereby reducing fluorescence response time and improving detection sensitivity. Our findings suggest that the strategy proposed in this work, i.e., combining the degradable gel with the CD-based fluorescence probe, holds a promising potential in creating the green and sustainable fluorescent sensors.
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•A degradable hydrogel with fluorescence-emitted CD was prepared for the specific detection of Fe3+ ions.•The CDs@DPPG can self-degrade to a liquid with the viscosity of ∼ 2.7 mPa s at a certain temperature.•The degradable feature address the issue of secondary contamination posed by quasi-solid and non-degradable matrix.•The porous network structure of CDs@DPPG provides the enhanced ion transport channels and improves the detection sensitivity of Fe3+ ions. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0927-7757 |
DOI: | 10.1016/j.colsurfa.2025.136414 |