Abstract
BaTiO3:(5 %)Eu3+ nanoparticles and BaTiO3:(5 %)Eu3+@SiO2 composites were synthesized by the solvothermal method. The effects on the structure, morphology and luminescent properties were studied using samples with different molar ratios of BaTiO3:(5 %)Eu3+@SiO2: 60:40, 50:50, 40:60, 30:70, 20:80, 10:90, 08:92, 6.5:93.5, 05:95, and 1.5:98.5. When the amount of silica in the composites was increased, the orange emission of Eu3+ increased, too; this was observed by exciting the charge transfer band centered at 283 nm. Furthermore, an increase in the intensity of the emission was obtained under excitation at 394 nm as a consequence of the improvement in the crystallinity of the samples. The presence of silica and the degree of crystallinity of the samples were determined through the Fourier transform infrared spectra and X-ray diffraction patterns. All of the results suggest that our ceramic material could be a good candidate for biomedical applications such as biolabeling, since the luminescence of BaTiO3:(5 %)Eu3+@SiO2 composites have an emission intensity higher than that of nanoparticles composed solely of BaTiO3:Eu3+. This work demonstrates that BaTiO3:Eu3+@SiO2 composites have an emission intensity higher than that of nanoparticles composed solely of BaTiO3:Eu3+.
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Acknowledgments
This work was supported by the IPN through projects SIP-20140031, SIP-20140032. J. Reyes Miranda acknowledges the Ph. D. scholarship from CONACYT. The authors thank the experimental support of CNMN-IPN for structural studies. The authors thank PhD Haggeo Desirena Enriquez for his technical support in luminescence studies. The authors also would like to thank Henry Jankiewicz for the editing work that he did for this paper. The authors would also like to thank M. García Murillo for her assistance.
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Reyes Miranda, J., García Murillo, A., de J. Carrillo Romo, F. et al. Synthesis and optical properties of BaTiO3:Eu3+@SiO2 glass ceramic nano particles. J Sol-Gel Sci Technol 72, 435–442 (2014). https://doi.org/10.1007/s10971-014-3480-8
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DOI: https://doi.org/10.1007/s10971-014-3480-8