A fluorescent probe based on carbon quantum dots with spectral selectivity for sensitive detection of Cr(VI) and Hg(II) in environmental waters

Zhou, Yan; Chen, Guoqing; Ma, Chaoqun; Gu, Jiao; Yang, Taiqun; Li, Lei; Gao, Hui; Xiong, Yi; Zhu, Chun; Hu, Anqi; Li, Xin; Guan, Weinan; Zhang, Wei

doi:10.1016/j.dyepig.2023.111845

Dyes and Pigments

2024

DOI: 10.1016/j.dyepig.2023.111845

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A fluorescent probe based on carbon quantum dots with spectral selectivity for sensitive detection of Cr(VI) and Hg(II) in environmental waters

Yan Zhou,

Guoqing Chen,

Chaoqun Ma

et al.

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2024

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Cited by 7 publications

References 44 publications

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Switching Photoluminescence “On‐Off‐On” for Detection of Chromium (VI) Ion and Ascorbic Acid with N,S‐Codoped Carbon Dots

Mishra,

Bhattacharya

2024

ChemistrySelect

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A photoluminescent‐based “Turn On → Off → On” technique was adopted for a toxic, heavy metal ion detection, that is, specifically chromium (VI) and a pharmaceutically relevant ascorbic acid molecule. Metal‐free, environmentally benign, and fluorescent carbon dots, a potential vehicle for spectrofluorometric detection, were successfully deployed as sensors. Carbon dots synthesized from citric acid and sulfanilamide conserve the fragments of the precursor molecule on the surface. Zeta potential measurement evidenced the positively charged carbon nanoparticles physically interact with the Cr(VI)/Cr2O72− in acidic pH, resulting in a remarkable quenching in net fluorescence. Thorough studies revealed that the static quenching and inner filter effect were responsible for the reduction in fluorescence intensity. We have demonstrated a new rapid (in seconds) detection platform for Cr(VI) and ascorbic acid.

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Switching Photoluminescence “On‐Off‐On” for Detection of Chromium (VI) Ion and Ascorbic Acid with N,S‐Codoped Carbon Dots

Mishra,

Bhattacharya

2024

ChemistrySelect

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Recent advances in carbon quantum dot photocatalysis

Xu,

Yu,

Peng

et al. 2024

Res Chem Intermed

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Nanomaterials as fluorescent sensor and colorimetric sensor for toxic Hg(II) ion: A review

Arora,

Chahal,

Issar

et al. 2024

Ionics

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A fluorescent probe based on carbon quantum dots with spectral selectivity for sensitive detection of Cr(VI) and Hg(II) in environmental waters

Cited by 7 publications

References 44 publications

Switching Photoluminescence “On‐Off‐On” for Detection of Chromium (VI) Ion and Ascorbic Acid with N,S‐Codoped Carbon Dots

Switching Photoluminescence “On‐Off‐On” for Detection of Chromium (VI) Ion and Ascorbic Acid with N,S‐Codoped Carbon Dots

Recent advances in carbon quantum dot photocatalysis

Nanomaterials as fluorescent sensor and colorimetric sensor for toxic Hg(II) ion: A review

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