Preparation and Characterization of Fe3O4/CA@CQDs Magnetic-fluorescent Composite

被引：0
|
作者：
Dong S.-L. [1 ]
Wang S.-N. [1 ]
Wang X.-L. [1 ]
Liu Y.-J. [1 ,2 ]
机构：
[1] College of Chemistry Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou
[2] Silicon Lake College, Suzhou
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2019年 / 40卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Carbon quantum dots; Composite material; Fluorescent; Magnetic;
D O I：
10.3788/fgxb20194004.0453
中图分类号：
学科分类号：
摘要：
For preparation of low toxicity and excellent magnetic-fluorescent composite material, carbon quantum dots(CQDs) with high light stability and biocompatibility were selected as fluorescent probe. The CQDs with excellent fluorescence were successfully synthesized by one-step hydrothermal method. Superparamagnetic nanoparticles Fe3O4 were prepared by hydrothermal coprecipitation, which were modified by citric acid(CA) with good biocompatibility.Then Fe3O4/CA was formed and riched of functional hydroxyl and carboxylgroups. Through coupling agent ethylenediamine, the CQDs were connected with Fe3O4/CA for successful preparation of magnetic-fluorescent composite material Fe3O4/CA@CQDs. Fourier transform infrared spectroscopy(FTIR), fluorescence spectrophotometer, vibrating sample magnetometer(VSM), X-ray diffraction(XRD), fluorescence microscope and transmission electron microscopy(TEM) were used for characterization. The results show that the Fe3O4/CA@CQDs possessed core shell structure with an average diameter of 30-40 nm and the saturation magnetic intensity 20.14 A•m2•kg-1. Attributed to the excellent fluorescence properties and magnetic, low cytotoxicity and high biocompatibility, the bifunction composite material is expected to replace traditional magnetic-fluorescent nanocomposites and widely used in biomedical fields. © 2019, Science Press. All right reserved.
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页码：453 / 458
页数：5
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