Facile and efficient fabrication of g-C<sub>3</sub>N<sub>4</sub> quantum dots for fluorescent analysis of trace copper(II) in environmental samples

doi:10.1016/j.cclet.2019.05.058

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Guide A facile and efficient fabrication of g-C₃N₄ quantum dots with highly fluorescent based on recrystallization and ultrasonic exfoliation was presented. The obtained g-C₃N₄ QDs was successfully applied to the determination of trace Cu(II) in different environmental water samples.

Abstract 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 (gC₃N₄) 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.

Key words： Graphitic carbon nitride Quantum dots Recrystallized Fluorescent analysis Copper(II)

Received: 25 April 2019

Fund:We gratefully acknowledge the support from the National Natural Science Foundation of China (No. 21605052), the Special Support Program of Guangdong Province (No. 2016TQ03R749), the Special Project of Science and Technology Development of Guangdong Province (No. 2017B020207011) and the Guangdong Natural Science Foundation (No. 2016A020221030).

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	Articles by authors
	Qin Liu
	Debin Zhu
	Manli Guo
	Ying Yu
	Yujuan Cao

Cite this article:

Qin Liu,Debin Zhu,Manli Guo, et al. Facile and efficient fabrication of g-C₃N₄ quantum dots for fluorescent analysis of trace copper(II) in environmental samples[J]. Chinese Chemical Letters, 2019, 30(09): 1639-1642.

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http://www.chinchemlett.com.cn/EN/10.1016/j.cclet.2019.05.058 OR http://www.chinchemlett.com.cn/EN/Y2019/V30/I09/1639

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