Pequi-Derived Carbon Dots as a Fluorescence Quenching Sensor for Sensitive Detection of Fe3+ Ions
This study presents the pequi (Caryocar coriaceum) as a new biomass source for carbon dots synthesis. The pequi almond, usually discarded, was used as the biomass precursor in one-step hydrothermal green synthesis of carbon dots. Pequi-based carbon dots (PQ-CDs) exhibited an estimated height of arou...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2025-04-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392025000200201&lng=en&tlng=en |
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| Summary: | This study presents the pequi (Caryocar coriaceum) as a new biomass source for carbon dots synthesis. The pequi almond, usually discarded, was used as the biomass precursor in one-step hydrothermal green synthesis of carbon dots. Pequi-based carbon dots (PQ-CDs) exhibited an estimated height of around 8 nm, with hydroxyl, carbonyl, and amino functional groups confirmed by FTIR, bright blue emission, and a quantum yield of 17.9%. PQ-CDs were employed as fluorescent sensors for Fe3+ ions, based on the quenching of PQ-CDs fluorescence by interaction with Fe3+ ions. The sensor demonstrated a linear relationship between the quenching of PQ-CDs fluorescence and the increase in Fe3+ ion concentration, with a LOD of 1.16 μmol L-1, well below the maximum Fe3+ concentration for drinking water established by the WHO. PQ-CDs are a cost-effective and highly sensitive alternative for Fe3+ ions detection in drinking water samples from the Cariri region. |
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| ISSN: | 1516-1439 |