Fabrication and ultraviolet-shielding properties of silica-coated titania-doped ceria nanoparticles |
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| Authors: | Weifan CHEN Jianming HONG Huiquan LI Yongxiu LI |
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| Affiliation: | aSchool of Materials Science & Engineering, Nanchang University, Nanchang 330031, China;bResearch Center of Rare Earths & Micro/Nano Functional Materials, Nanchang University, Nanchang 330031, China;cCenter of Materials Analysis, Nanjing University, Nanjing 210093, China;dChemistry Department, Fuyang Normal College, Fuyang 236041, China |
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| Abstract: | A series of well-dispersed titania-doped ceria nanoparticles Ce1-xTixO2 were rapidly prepared by a novel salt-assisted solution combustion process using correspondent metal nitrates as oxidizers and ethyl glycol as fuel, and then coated with amorphous silica by seeded polymerization using tetraethyl orthoslicate (TEOS). The as-prepared samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and ultraviolet-visible light (UV-Vis) diffuse reflectance spectroscopy. The results indicated that compared with the as-prepared pure ceria nanoparticles, the red-shift phenomenon occurred for Ti-doped ceria nanoparticles with Ti incorporation. Meanwhile, the absorption intensity in the UV light region slightly decreased and transmission rate in visible light region was somewhat enhanced. In comparison with the silica-coated CeO2 nanopowders, the silica-coated Ce0.95Ti0.05O2 nanopowders displayed the same absorption intensity in the UV light region, broader UV absorption band and higher transmission rate in visible light region. |
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| Keywords: | ceria nanoparticles titania doping silica coating UV shielding salt-assisted solution combustion synthesis rare earths |
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