In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 11 ( 2023), p. 3300-3307
Abstract:
Detection of Fe( iii ) and Cu( ii ) in water is highly desirable because their abnormal levels can cause serious harm to human health and environmental safety. In this work, a ratiometric luminescence sensing platform based on lanthanide-based silica nanoparticles was constructed for the detection of Fe 3+ and Cu 2+ ions. The terbium-silica nanoparticles (named SiO 2 @Tb) with dual-emission signals were successfully prepared by grafting Tb 3+ ions onto trimellitic anhydride (TMA) functionalized silica nanospheres. It can serve as a ratiometric fluorescent probe for the detection of Fe 3+ and Cu 2+ ions in water with the green emission of Tb 3+ ions as a response signal and the blue emission of silica nanospheres as the reference signal. Significantly, an easy-to-differentiate color change for visual detection was also realized. SiO 2 @Tb shows high sensitivity even in very low concentration regions towards the sensing of Fe 3+ and Cu 2+ with low detection limits of 0.75 μM and 0.91 μM, respectively. Moreover, the mechanism for the luminescence quenching of SiO 2 @Tb was systematically investigated, and was attributed to the synergetic effect of the absorption competition quenching (ACQ) mechanism and cation exchange. This study demonstrates that SiO 2 @Tb can be employed as a promising fluorescent probe for the detection of Fe 3+ and Cu 2+ ions, and the combination of lanthanide ions with silica nanoparticles is an effective strategy to construct a ratiometric fluorescent sensing platform for the determination of analytes in environmental detection.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1472887-4
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