Citation: DENG Xue-Zu, WANG Fang-Ming, WANG Cai-He, QIN Dong-Dong, LI Yi-Ran, SHAN Duo-Liang, LU Xiao-Quan. Fluorescent Sensor Based on Graphite Carbon Nitride Quantum Dots for Detection of 2, 4, 6-Trinitrophenol in Water Environment[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(12): 1852-1858. doi: 10.11895/j.issn.0253-3820.160430 shu

Fluorescent Sensor Based on Graphite Carbon Nitride Quantum Dots for Detection of 2, 4, 6-Trinitrophenol in Water Environment

Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China

Received Date: 3 June 2016
Revised Date: 29 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21575115, 21327005, 21175108).

An extremely efficient, sensitive and facile fluorescent sensing approach for detection of 2,4,6-trinitrophenol (TNP) based on the graphite carbon nitride quantum dots (g-CNQDs) was reported. The g-CNQDs material, a novel nanometer sized semiconductor with distinct characteristics of good water-solubility, biocompatibility, environmental-friendly nontoxicity property, was successfully prepared by solid-state reaction strategy at an extremely low temperature, and we revealed that the fluorescence quenching of g-CNQDs ascribe to the molecular interactions (such as electrostatic, π-π, and hydrogen bonding interactions) between TNP and g-CNQDs. This fluorescence sensor presented high selectivity toward TNP with quick response. In the experiment, we found that g-CNQDs exhibited fine linear relationship in the concentration of 0.1-100 μmol/L and 0.1-100 μmol/L of TNP with a low detection limit (0.05 nmol/L, S/N=3). The proposed approach has a perfectly potential application prospect in fluorescence sensing field, and can be employed for determination of TNP in natural water samples and supervision of TNP in the natural water environment.
- Graphite carbon nitride quantum dots,
- Fluorescent sensor,
- 2,4,6-Trinitrophenol
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