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Carbon Dot-Based Ratiometric Fluorescent Probe Platform for Visual Quantitative Determination of Hg2+.
- Source :
- ACS Applied Nano Materials; 1/26/2024, Vol. 7 Issue 2, p1509-1518, 10p
- Publication Year :
- 2024
-
Abstract
- Determination of Hg<superscript>2+</superscript> is crucial as its high toxicity poses a potential serious threat to food and the environment. Therefore, it is urgent to explore a portable, cost-effective, and visual approach to monitor Hg<superscript>2+</superscript>. Herein, ratiometric-constructed dual-emissive carbon dots (P-R-CDs) with dual emissions at 440 and 575 nm were fabricated by blue CDs and orange CDs for visual quantitative detection of Hg<superscript>2+</superscript>. The vivid colorimetric sensing can be achieved by quantitative quenching blue emission with Hg<superscript>2+</superscript> and relative stable orange emission. Consecutive fluorescent color transformation with elimination of blue emission by Hg<superscript>2+</superscript> embodied visible distinguishable determination of Hg<superscript>2+</superscript>, with a detection limit of 2.9 nM. Furthermore, a smartphone-supported visual sensing platform was established for the determination of Hg<superscript>2+</superscript> by capturing and identifying the RGB value of the variation precisely. The smartphone assistant detection greatly promoted the effectiveness of detection and provided promising on-site application in real samples. The recoveries in real water and food samples revealed the excellent environmental tolerance of P-R-CDs, which represented a prospective application utility for quantitative monitoring of Hg<superscript>2+</superscript> in food and the environment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25740970
- Volume :
- 7
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- ACS Applied Nano Materials
- Publication Type :
- Academic Journal
- Accession number :
- 175072810
- Full Text :
- https://doi.org/10.1021/acsanm.3c02927