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Preparation of novel magnetic fluorescent microspheres from copperas and fluorescence enhancement with zinc ions

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Abstract

The aim of this study is to develop a new method for the preparation of Fe3O4@SiO2–An NPs from copperas. The core–shell structures of the nanoparticles and chemical composition have been confirmed by TEM, XRD and FTIR techniques. Fluorescence Enhancement of Fe3O4@SiO2–An NPs with zinc ions was investigated by fluorescence emission spectra. The results indicated that the Fe3O4 NPs with a high purity (Total Fe 72.16 %) were obtained from copperas by chemical co-precipitation method and have a uniform spherical morphology with an average diameter of about 10 nm. The Fe3O4 NPs coated with silica nanoparticles were prepared, and an attempt had been made that the Fe3O4@SiO2 NPs were modified by 3-aminopropyltriethoxysilane and 9-anthranone successively. The recommended mole ratio of ethanol to water and the content of ammonia water added were 4:1 and 25 wt% respectively, which have an obviously effect on the combination of the final well-ordered MNPs with the amino functionalities and reactant components. The functionalized Fe3O4@SiO2–An NPs have a fluorescence property and this fluorescence effect can be enhanced with the Zn2+ ions attachment. Meanwhile, the saturated magnetization of Fe3O4@SiO2–An NPs was 37.8 emug−1 at 25 °C and this fluorescent material exhibited excellent magnetic properties. A new way was therefore provided for the comprehensive utilization of the unmarketable copperas. Moreover, the functionalized Fe3O4@SiO2–An NPs have a big potential in environmental decontamination, medical technology and biological science.

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Acknowledgments

This research project was supported by the Joint Funds of the National Natural Science Foundation of China (Grant No. u0837602) and the Yunnan Province Science Youth Experts Fund (Grant No. 2012FD012) and the authors are grateful to the Analysis and Testing Foundation of Kunming University of Science and Technology for its technical support.

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Authors and Affiliations

  1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Chao Lv, Shaojun Bai & Shuming Wen

  2. Engineering Research Center for Efficient Utilization of Mineral Resources in Western of China, Ministry of Education, Kunming, 650093, People’s Republic of China

    Shuming Wen

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  1. Chao Lv
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Correspondence to Shaojun Bai.

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Lv, C., Bai, S. & Wen, S. Preparation of novel magnetic fluorescent microspheres from copperas and fluorescence enhancement with zinc ions. J Sol-Gel Sci Technol 69, 520–527 (2014). https://doi.org/10.1007/s10971-013-3252-x

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