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Terbium alginate encapsulated CsPbI3@Pb-MOF: a ratiometric fluorescent bead for detection and adsorption of Fe3+.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2/14/2024, Vol. 53 Issue 6, p2541-2550, 10p
- Publication Year :
- 2024
-
Abstract
- Halide perovskite nanocrystals are innovative luminescent materials for fluorescent probes with high quantum yield and narrow emission bandwidth. However, the limited stability, single-signal response, and separation challenges obstruct their widespread use in water ion detection. Herein, a ratiometric fluorescence sensor based on terbium alginate gel beads (green fluorescent, namely Tb-AG) embedded with powdered CsPbI<subscript>3</subscript>@Pb-MOF (red fluorescent) was prepared for fluorescent determination and adsorption of Fe<superscript>3+</superscript>. Pb-MOF's protection notably enhances the water stability of CsPbI<subscript>3</subscript>, while the energy transfer between CsPbI<subscript>3</subscript>@Pb-MOF and Tb<superscript>3+</superscript> elevates the optical performance of CsPbI<subscript>3</subscript>@Pb-MOF@Tb-AG. Significantly, Fe<superscript>3+</superscript> markedly suppresses CsPbI<subscript>3</subscript>@Pb-MOF red fluorescence at 647 nm, while not noticeably affecting Tb-AG green emission at 528 nm. The sensor exhibited a strong linear response to Fe<superscript>3+</superscript> concentrations ranging from 0 to 90 μM, with a detection limit of 0.44 μM and high selectivity. The CsPbI<subscript>3</subscript>@Pb-MOF@Tb-AG-based sensor has been effectively validated through its successful use in detecting Fe<superscript>3+</superscript> in tap and river water samples. Furthermore, CsPbI<subscript>3</subscript>@Pb-MOF@Tb-AG demonstrates a notable adsorption capacity of 325.4 mg g<superscript>−1</superscript> Fe<superscript>3+</superscript>. Finally, the mechanism of Fe<superscript>3+</superscript> detection and adsorption was determined. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 53
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 175260380
- Full Text :
- https://doi.org/10.1039/d3dt04187e