Highly fluorescent carbon quantum dots as nanoprobes for sensitive and selective determination of mercury (II) in surface waters

被引：52
作者：
Hua, Jianhao [1 ]
Yang, Jian [2 ]
Zhu, Yan [2 ]
Zhao, Chunxi [1 ]
Yang, Yaling [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Life Sci & Technol, Kunming 650500, Yunnan, Peoples R China
[2] Cent Monitoring Ctr Kunming City, Kunming 650228, Yunnan, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2017年 / 187卷
关键词：
Carbon quantum dots; Polyacrylamide; Fluorescence quenching; Mercury ion detection; PHOTOLUMINESCENCE PROPERTIES; A549; ACTIVITY; PROBE; IONS; FACILE; PRECONCENTRATION; NANOPARTICLES; FABRICATION; SILVER; OXIDE;
D O I：
10.1016/j.saa.2017.06.058
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A novel carbon quantum dots (CQDs) was successfully prepared through one-step green hydrothermal method using polyacrylamide as carbon source. The prepared CQDs were characterized using TEM, XRD, XPS, FT-IR, UV-Vis, and fluorescence spectroscopy. The CQDS was demonstrated as nanoprobes for mercury ion detection, moreover, it demonstrated excitation-dependent and superior stability in acidic and alkaline media. Besides, the probe exhibited a good linearity range (0.25-50 mu M) and a low detection limit (13.48 nM). These attractive properties indicated that this novel CQDS can adapt to a variety of complex pH environment, which had extensive prospect and promising application for detection of mercury ions in complex water samples. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：149 / 155
页数：7
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