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• W4283446548 endingPage "9506" @default.
• W4283446548 startingPage "9498" @default.
• W4283446548 abstract "The development of sensors with high sensitivity, good selectivity and reproducibility are of great importance for the detection of Fe3+ in contaminated water for environmental monitoring. In this work, a reflux approach has been adopted to synthesize Ti3C2Tx quantum dots (QDs) based on the cutting effect of tetramethylammonium hydroxide (TMAOH) on Ti3C2Tx at high temperature. The surface-functionalized Ti3C2Tx QDs contained abundant amino groups and exhibited tunable pH-dependent emission, which was attributed to the protonation and deprotonation of the surface terminations. The linearity of the radiometric fluorescence intensity versus pH indicates its great potential as a dual-emission ratiometric pH sensor. Additionally, the Ti3C2Tx QDs exhibited tunable excitation-dependent emission behavior, which was related to the degree of passivation by the amino groups on the surface. Furthermore, the fluorescence intensity of the Ti3C2Tx QDs shows a linear response toward Fe3+ in the nanomolar to micromolar range with a low detection limit of 2 nM, originating from the oxidation and reduction between Fe3+ and Ti3C2Tx. This ultra-sensitive and selective detection capability demonstrated the environmental application potential for Ti3C2Tx QDs as a nanoprobe to monitor Fe3+." @default.
• W4283446548 created "2022-06-26" @default.
• W4283446548 creator A5019866848 @default.
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• W4283446548 date "2022-01-01" @default.
• W4283446548 modified "2023-10-18" @default.
• W4283446548 title "Tunable fluorescent amino-functionalized Ti₃C₂T_<i>x</i> MXene quantum dots for ultrasensitive Fe³⁺ ion sensing" @default.
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• W4283446548 doi "https://doi.org/10.1039/d2nr02088b" @default.
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• W4283446548 hasPublicationYear "2022" @default.
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