Superparamagnetic nanocomposite Fe3O4@SiO2-NH2/CQDs as fluorescent probe for copper (II) detection

被引：18
作者：
Dong, Shuling [1 ]
Wang, Shengnan [1 ]
Wang, Xiuling [1 ]
Zhai, Linzhi [2 ]
机构：
[1] Suzhou Univ Sci & Technol, Sch Chem Biol & Mat Engn, Suzhou 215000, Peoples R China
[2] Jiangsu Univ Sci & Technol, Dept Environm Engn, 2 Mengxi Rd, Zhenjiang 212000, Jiangsu, Peoples R China
来源：
MATERIALS LETTERS | 2020年 / 278卷 / 278期
关键词：
Magnetic materials; Nanocomposites; Fluorescence; Carbon quantum dots; Copper ion detection; QUANTUM DOTS; NANOPARTICLES; IONS;
D O I：
10.1016/j.matlet.2020.128404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new type of magnetic fluorescent nanocomposite (Fe3O4@SiO2-NH2/CQDs) was prepared by bonding carbon quantum dots (CQDs) with Fe3O4@SiO2-NH2 nanocomposites through amine-carbonyl interactions. The results showed that the prepared nanocomposites have spherical structure with good dispersion in aqueous solution, superparamagnetic and good fluorescence properties. In addition, the Fe3O4@SiO2-NH2/CQDs nanocomposites were used as a fluorescent probe for the first time to detect Cu2+, and exhibited high sensitive and selective detection properties in a wide linear range of 80 mu M. The limit of detection (LOD) for Cu2+ was 0.16 mu M. (C) 2020 Elsevier B.V. All rights reserved.
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页数：4
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