Red fluorescent carbon dots for sensitive and selective detection and reduction of Au3

Simultaneous detection and reduction of Au3+ in contaminated water is extremely desirable. Herein, we synthesized red fluorescent carbon dots (CDs) for Au3+ detection with dual colorimetric and fluorescent spectral response within 2 min. The CDs showed high sensitivity and selectivity towards Au3+ w...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2022-11, Vol.371, p.132534, Article 132534
Main Authors: Li, Xiangcao, Hu, Qian, Yang, Ke, Zhao, Shaojing, Zhu, Shaohua, Wang, Benhua, Zhang, Yi, Yi, Jianing, Song, Xiangzhi, Lan, Minhuan
Format: Article
Language:English
Subjects:
Carbon dots
Colorimetric
Colorimetry
Fluorescence
Fluorescent probe
Gold recovery
Redox reactions
Selectivity
Spectral sensitivity
Waste water
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Summary:Simultaneous detection and reduction of Au3+ in contaminated water is extremely desirable. Herein, we synthesized red fluorescent carbon dots (CDs) for Au3+ detection with dual colorimetric and fluorescent spectral response within 2 min. The CDs showed high sensitivity and selectivity towards Au3+ with a low detection limit of 29 nM. Further, CDs selectively reduce Au3+ to Au0 via redox reaction between the thioether group on the surface of CDs and Au3+. Accordingly, CDs were effectively utilized to detect and extract Au3+ without interference from other metal ions. [Display omitted] •Red fluorescent CDs were synthesized and characterized.•CDs show colorimetric and fluorescent spectral response to Au3+.•CDs can selectively reduce Au3+ to Au0 from environmental water.•The sensing and reduction mechanism of CDs toward Au3+ were demonstrated.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2022.132534