Functionalized Mesoporous SBA-15 with CeF<sub>3</sub>: Eu<sup>3+</sup> Nanoparticle by Three Different Methods: Synthesis, Characterization, and Photoluminescence
<p>Abstract</p> <p>Luminescence functionalization of the ordered mesoporous SBA-15 silica is realized by depositing a CeF<sub>3</sub>: Eu<sup>3+</sup> phosphor layer on its surface (denoted as CeF<sub>3</sub>: Eu<sup>3+</sup>/SBA-15/I...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2010-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-010-9534-0 |
| Summary: | <p>Abstract</p> <p>Luminescence functionalization of the ordered mesoporous SBA-15 silica is realized by depositing a CeF<sub>3</sub>: Eu<sup>3+</sup> phosphor layer on its surface (denoted as CeF<sub>3</sub>: Eu<sup>3+</sup>/SBA-15/IS, CeF<sub>3</sub>: Eu<sup>3+</sup>/SBA-15/SI and CeF<sub>3</sub>: Eu<sup>3+</sup>/SBA-15/SS) using three different methods, which are reaction in situ (I-S), solution impregnation (S-I) and solid phase grinding synthesis (S-S), respectively. The structure, morphology, porosity, and optical properties of the materials are well characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N<sub>2</sub> adsorption, and photoluminescence spectra. These materials all have high surface area, uniformity in the mesostructure and crystallinity. As expected, the pore volume, surface area, and pore size of SBA-15 decrease in sequence after deposition of the CeF<sub>3</sub>: Eu<sup>3+</sup> nanophosphors. Furthermore, the efficient energy transfer in mesoporous material mainly occurs between the Ce<sup>3+</sup> and the central Eu<sup>3+</sup> ion. They show the characteristic emission of Ce<sup>3+</sup> 5d → 4f (200–320 nm) and Eu<sup>3+</sup> <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub> <it>J</it> </sub>(<it>J</it> = 1–4, with <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>1</sub> orange emission at 588 nm as the strongest one) transitions, respectively. In addition, for comparison, the mesoporous material CeF<sub>3</sub>: Eu<sup>3+</sup>/SBA-15/SS exhibits the characteristic emission of Eu<sup>3+</sup> ion under UV irradiation with higher luminescence intensity than the other materials.</p> |
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| ISSN: | 1931-7573 1556-276X |