【摘 要】
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A series of well-dispersed titania-doped ceria nanoparticles Ce1-xTixO2 were rapidly prepared by a novel salt-assisted solution combustion process using corresp
【机 构】
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School of Materials Science & Engineering, Research Center of Rare Earths & Micro/Nano Functional Ma
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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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