Novel “on–off” fluorescence sensing for rapid and accurate determination of Cr<sup>3+</sup> based on g-CNQDs

Xu, Xiaohua; Li, Huye; Sun, Yapeng; Ma, Tianfeng; Shi, Lin; Mu, Wencheng; Wang, Huan; Lu, Yongchang

doi:10.1039/d3ra05091b

RSC Adv.

2023

DOI: 10.1039/d3ra05091b

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Novel “on–off” fluorescence sensing for rapid and accurate determination of Cr³⁺ based on g-CNQDs

Xiaohua Xu,

Huye Li,

Yapeng Sun

et al.

Abstract: An “on–off” fluorescence sensing system was constructed with g-CNQDs@p-acetaminophenol for detection of Cr3+. g-CNQDs were synthesized, and the fluorescence signal was enhanced based on the effect between APAP and g-CNQDs. The introduction of Cr3+ into the system results in fluorescence quenching.

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2024

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Cited by 3 publications

References 36 publications

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Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Shi,

Wu,

Xue

et al. 2024

Preprint

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A convenient and sensitive dual-signal visualization method is constructed for detection of trivalent chromium ions (Cr3+) based on fluorescent carbon dots (CDs) and glutathione-modified gold nanoparticles (GSH-Au NPs). The fluorescence of CDs can be quenched by GSH-Au NPs due to the inner filter effect. Cr3+ induces aggregation of GSH-Au NPs because of the coordination with GSH on the surface of Au NPs, leading to the red-shift of surface plasmon resonance absorption of Au NPs that provides a “turn-on” fluorescence and colorimetric assay for Cr3+. The fluorescence/colorimetric dual signal detection shows high sensitivity for Cr3+ with wide detection linear ranges (0.5–70 µM for fluorescence detection and 2–50 µM for colorimetric detection) and low detection limits (0.31 µM for fluorescence detection and 0.30 µM for colorimetric detection). Besides, the method has high selectivity for Cr3+and can be used for detection of Cr3+ in lake water samples, showing its great potential for visual detection of environmental Cr3+.

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Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Shi,

Wu,

Xue

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

Shi,

Wu,

Xue

et al. 2024

Preprint

View full text Add to dashboard Cite

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

Shi,

Wu,

Xue

et al. 2024

Preprint

View full text Add to dashboard Cite

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Novel “on–off” fluorescence sensing for rapid and accurate determination of Cr³⁺ based on g-CNQDs

Cited by 3 publications

References 36 publications

Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

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Novel “on–off” fluorescence sensing for rapid and accurate determination of Cr3+ based on g-CNQDs

Cited by 3 publications

References 36 publications

Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Fluorescence/colorimetric dual-signal sensor based on carbon dots and gold nanoparticles for visual quantization of Cr 3+

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

Fluorescence/Colorimetric Dual-Signal Sensors Based on Carbon Dots and Gold Nanoparticles for Visual Quantization of Cr3+

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Novel “on–off” fluorescence sensing for rapid and accurate determination of Cr³⁺ based on g-CNQDs