Monolayer g-C3N4 Fluorescent Sensor for Sensitive and Selective Colorimetric Detection of Silver ion from Aqueous Samples
Monolayer g-C3N4 Fluorescent Sensor for Sensitive and Selective Colorimetric Detection of Silver ion from Aqueous Samples
复制标题
单层 g-C3N4 荧光传感器用于水样中银离子的灵敏和选择性比色检测
DOI：
10.1007/s10895-016-1764-9
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发表时间：
2016-03-01
影响因子：
2.7
通讯作者：
Yu, Ying
中科院分区：
文献类型：
--
作者：
Cao, Yujuan;Wu, Wei;Yu, Ying
由于重金属离子对人类健康的严重威胁，迫切需要对自然水环境中的重金属离子进行快速、灵敏的检测。本文将单层类石墨片状C3N4(g-C3N4)材料作为一种新型荧光传感器应用于水溶液中痕量银离子的检测。合成的g-C3N4的厚度为0.45 nm，用超声波两次剥离即可得到。在乙二胺四乙酸存在下，该传感器对水中银(I)离子的检出限可达52.3nmol/L，与其他金属离子共存时不产生干扰。在最佳条件下，g-C3N4单层膜成功用于不同环境水和饮用水样品中痕量银(I)的测定。
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.