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J Fluoresc. 2016 Mar;26(2):739-44. doi: 10.1007/s10895-016-1764-9. Epub 2016 Jan 11.

Monolayer g-C3N4 Fluorescent Sensor for Sensitive and Selective Colorimetric Detection of Silver ion from Aqueous Samples.

Cao Y1,2, Wu W3, Wang S3, Peng H3, Hu X3,4, Yu Y3,4.

Author information

1
School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.
2
Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China. caoyj@scnu.edu.cn.
3
School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China.
4
Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, China.

Abstract

Rapid and sensitive detection of heavy-metal ions in natural water environments worldwide is urgently needed because of their severe threats to human health. In the present work, monolayer graphite-like flake C3N4 (g-C3N4) materials were applied as a new fluorescent sensor for the detection of trace silver ion in aqueous solution. The thickness of synthesized g-C3N4 was 0.45 nm and obtained by exfoliating twice with ultrasonic. With the presence of ethylene diamine tetraacetic acid as a screening agent, the highly sensitive sensor reached a low detection limit of 52.3 nmol/L for silver (I) ion and there was no disturbance when silver (I) ion coexisted with other metal ions in water samples. Under the optimal conditions, the monolayer g-C3N4 was successfully used to detect trace silver (I) ion in different environmental water and drinking water samples.

KEYWORDS:

Aqueous samples; Fluorescent sensor; Monolayer g-C3N4; Silver (I) ion

PMID:
26753758
DOI:
10.1007/s10895-016-1764-9
[Indexed for MEDLINE]

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