Citation: LIU Hong-Ying, HUANG Cheng, DAI Da-Xiang, JIAO Ming-Ru, ZHANG Ming-Zhen, GU Chun-Chuan. Green Synthesis of Fluorescent Carbon Nanodots from Chinese Wolfberry for Selective and Sensitive Detection of Ferric Iron[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(10): 1610-1617. doi: 10.11895/j.issn.0253-3820.171446 shu

Green Synthesis of Fluorescent Carbon Nanodots from Chinese Wolfberry for Selective and Sensitive Detection of Ferric Iron

1.
College of Life Information Science & Instrument Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
2.
Key Laboratory of Medical Information and 3D Bioprinting of Zhejiang Province, Hangzhou Dianzi University, Hangzhou 310018, China;
3.
Deparment of Clinical Laboratory, Hangzhou Cancer Hospital, Hangzhou 310002, China

Received Date: 23 November 2017
Revised Date: 12 August 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21405029, 51173035), the Science and Technology Program of Zhejiang Province of China (No. LGF18H200005) and the Young Talent Development Project of Zhejiang Science and Technology Association (No. 2016YCGC007).

Water dispersible fluorescent carbon nanodots (CDs) were prepared by a facile and eco-friendly hydrothermal process using Chinese wolfberry as precursor without any further surface modification. The obtained CDs were characterized by UV-visible absorption spectroscopy, fluorescence spectroscopy, high-resolution transmission electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopy. It showed emission spectrum of blue which located at 400 nm with excited wavelength of 320 nm. High quantum yield of 54%, long lifetime of 9.04 μs, and good biocompatibility were also observed. Importantly, the fluorescence intensity of CDs was selectively quenched within 2 min after addition of Fe³⁺. Based upon the phenomenon, a new fluorescent biosensor for detection of Fe³⁺ was proposed. No significant interference from other metal ions was observed. The linear range and detection limit for Fe³⁺ was 1-50 μmol/L and 232 nmol/L (3σ), respectively. These superior properties demonstrated that the synthesized CDs had promising applications in the fields of environmental and biomedical science.
- Carbon nanodots,
- Chinese wolfberry,
- Hydrothermal method,
- Ferric iron,
- Biosensor
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