Preparation and Characteristics of Core-Shell Structure Eu(DBM)3Phen@SiO2 Micro-Sphere

doi:10.1016/j.jmst.2013.04.023

J. Mater. Sci. Technol.

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Preparation and Characteristics of Core-Shell Structure Eu(DBM)₃Phen@SiO₂ Micro-Sphere

Mingguang Yu, Guangxue Chen, Jiangwen Liu, Baoling Tang, Wentao Huang

State Key Laboratory of Pulp and Papermaking Engineering, South China University of Technology, Guangzhou 510640, China

Received:2012-11-02 Revised:2012-12-11 Online:2013-09-30 Published:2013-08-22
Contact: Guangxue Chen
Supported by:
National Natural Science Foundation of China (No. 60972134, No. 51205137) and the Fundamental Research Funds for the Central Universities with grant no. 2012ZM0067.

Abstract

Abstract:

Sphere-shape Eu(DBM)₃Phen@SiO₂ nanoparticles were fabricated by employing a modified alkaline catalyzed hydrolysis and precipitation method. The silica coated on the particles surface was obtained by means of hydrolysis and condensation of tetraethyl orthosilicate (TEOS). In this study, the particles morphology was analyzed by scanning electron microscopy (SEM) and the surface composition of samples was characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). It is confirmed that the SiO₂ shell has been coated on the rare earth complexes successfully. Moreover, the near-infrared photoluminescence emission analysis on the nanoparticles showed that the SiO₂ shell would increase the luminescence intensity of Eu(DBM)₃Phen. This is primarily due to the reason that SiO₂ shell with chemical inertness can effectively reduce the ion Eu³⁺ non-radiation transition probabilities, as well as the probability of rare earth luminescence quenching caused by the external medium.

Key words: Coreeshell, Micro-sphere, Rare earth complex, SiO2, Luminescent

Mingguang Yu, Guangxue Chen, Jiangwen Liu, Baoling Tang, Wentao Huang. Preparation and Characteristics of Core-Shell Structure Eu(DBM)₃Phen@SiO₂ Micro-Sphere[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.04.023.

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Preparation and Characteristics of Core-Shell Structure Eu(DBM)₃Phen@SiO₂ Micro-Sphere

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