Preparation and fluorescence characterization of monodisperse core‐shell structure SiO2@SiO2:Tb(1,2‐BDC)3phen microspheres by a sol‐seed method

The SiO2@SiO2:Tb(1,2‐BDC)3phen microspheres with monodispersed core‐shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2‐BDC, 1,2‐benzenedicarboxylic acid; phen, 1,10‐phenanthroline). Firstly, silica seed was...

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Bibliographic Details
Published in:Luminescence (Chichester, England) England), 2021-12, Vol.36 (8), p.1901-1909
Main Authors: Liu, Yan‐hong, Ma, Xiao‐guang, Zhu, Li‐ye, Li, Meng, Ren, Xiao‐xia, Zhang, Man
Format: Article
Language:English
Subjects:
Acetic acid
Analytical methods
Catalysis
Catalysts
Colloids
Core-shell structure
Electron microscopy
Fluorescence
Fluorescence spectroscopy
Infrared analysis
Infrared spectroscopy
Microscopy
Microspheres
Optoelectronics
Phosphors
Scanning electron microscopy
Shells
Silica
Silicon dioxide
SiO2@SiO2:Tb((1,2‐BDC)3phen microsphere
sol seed method
Spectroscopic analysis
Spectrum analysis
Terbium
Transmission electron microscopy
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Summary:The SiO2@SiO2:Tb(1,2‐BDC)3phen microspheres with monodispersed core‐shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2‐BDC, 1,2‐benzenedicarboxylic acid; phen, 1,10‐phenanthroline). Firstly, silica seed was fabricated by the hydrolysis of ethyl orthosilicate, and the Tb(1,2‐BDC)3phen was prepared by using 1,2‐BDC and phen. Then, a thin mesoporous silica shell doped with Tb(1,2‐BDC)3phen was grown on the prepared monodisperse silica colloids. The prepared phosphor was analyzed by Fourier‐transform infrared spectroscopy, X‐ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, thermogravimetric and fluorescence spectroscopy. The experimental results showed that the diameter of the SiO2@SiO2:Tb((1,2‐BDC)3phen microsphere was about 200 nm with a typical core‐shell structure, among which the diameter of the silica core was 180 nm, and that of the mesoporous silicon shell doped with terbium complex was about 10 nm. The fluorescence intensity of SiO2@SiO2:Tb((1,2‐BDC)3phen microsphere is nearly three times higher than that of Tb((1,2‐BDC)3phen complexes. The prepared microspheres could be widely used in bio‐imaging, optoelectronic appliances and medical diagnosis. The complex Tb(1,2‐BDC)3phen was uniformly attached to silica microspheres by sol‐seed method. The luminescence intensity of Core‐shell structure SiO2@SiO2:Tb(1,2‐BDC)3phen is three times that of Tb(1,2‐BDC)3phen.
ISSN:1522-7235
1522-7243
DOI:10.1002/bio.4120