Facile and efficient fabrication of g-C3N4 quantum dots for fluorescent analysis of trace copper(II) in environmental samples
| Autor: | Debin Zhu, Liu Qin, Ying Yu, Yujuan Cao, Manli Guo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Materials science Fabrication Graphitic carbon nitride Recrystallization (metallurgy) chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Copper 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Quantum dot Ultrasonic sensor 0210 nano-technology |
| Zdroj: | Chinese Chemical Letters. 30:1639-1642 |
| ISSN: | 1001-8417 |
| DOI: | 10.1016/j.cclet.2019.05.058 |
| Popis: | The facile preparation of g-C3N4 QDs with high fluorescent performance has become an important direction in the last decade. Herein, we develop a facile, rapid approach to synthesize highly fluorescent QDs based on recrystallization and ultrasonic exfoliation. Size-controllable graphitic carbon nitride (g-C3N4) QDs can be obtained from the precursor of recrystallized dicyandiamide, only 90 min is needed and the size of QDs is adjusted from 5 nm to 200 nm by controlling the ultrasonic time. Moreover, better fluorescent efficiency is also obtained comparing to traditional g-C3N4 QDs. The obtained g-C3N4 QDs responds to Cu(II) in the 0.5 nmol/L to 30 μmol/L concentration range, with a 0.3 nmol/L detection limit. The method was applied to the determination of Cu(II) in different environmental water samples. |
| Databáze: | OpenAIRE |
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