4.4 Article

Biocompatible Carbon Dot Decorated α-FeOOH Nanohybrid for an Effective Fluorometric Sensing of Cr (VI) in Wastewater and Living Cells

期刊

JOURNAL OF FLUORESCENCE
卷 32, 期 4, 页码 1489-1500

出版社

SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-022-02962-x

关键词

Hexavalent chromium; Fluorometric sensor; Stern-Volmer plot; Molecular docking

资金

  1. DST-SERB [EEQ/2018/000747]
  2. Dept. of Higher Education, Govt. of West. Bengal

向作者/读者索取更多资源

This article reports the fluorometric detection of toxic hexavalent chromium in wastewater and living cells using in-situ grown carbon quantum dots in a goethite nano-matrix. The selective and sensitive chromium sensor shows great potential for determining chromium contamination levels in various water samples, and its sensing mechanism has been evaluated using theoretical models. This research opens new avenues for wastewater monitoring and biomedical applications.
This article reports the fluorometric detection of toxic hexavalent chromium Cr (VI)) in wastewater and Cr (VI) contaminated living cells using in-situ grown carbon quantum dots into the goethite (alpha-FeOOH) nano-matrix. The synthesized nano-hybrid shows enormous potential in determining the chromium contamination levels in various types of water samples. This selective fluorometric probe is enormously sensitive (LOD 81 nM) toward hexavalent chromium, which makes it a dedicated chromium sensor. Moreover, the sensing mechanism has been assessed using Stern-Volmer's equation and fluorescence lifetime experiments showing the simultaneous occurrence of photoinduced electron transfer and the inner filter effect. This chromium sensor has also been employed to assess the contamination level in real-life industrial wastewater. The performance of this probe in a real-life wastewater sample is quite commendable. Further, this biocompatible fluorometric probe has been used to demonstrate the in-vitro sensing of Cr (VI) in HeLa cells. The rapid detection mechanism of hexavalent chromium in living cells has been validated using theoretical docking simulations. Henceforth, this fluorometric sensor material could open new avenues not only in wastewater monitoring but also in biomedical applications.

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