Fabrication and ultraviolet-shielding properties of silica-coated titania-doped ceria nanoparticles

• Published in: Journal of rare earths Vol. 29; no. 8; pp. 810 - 814
• Main Author: 陈伟凡 洪建明 李慧泉 李永绣
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2011; School of Materials Science & Engineering, Nanchang University, Nanchang 330031, China; Research Center of Rare Earths & Micro/Nano Functional Materials, Nanchang University, Nanchang 330031, China%Center of Materials Analysis, Nanjing University, Nanjing 210093, China%Chemistry Department, Fuyang Normal College, Fuyang 236041, China%Research Center of Rare Earths & Micro/Nano Functional Materials, Nanchang University, Nanchang 330031, China
• Subjects: ceria nanoparticles; Cerium oxide; Nanocomposites; Nanomaterials; Nanoparticles; Nanostructure; Polymerization; Rare earth metals; rare earths; salt-assisted solution combustion synthesis; silica coating; titania doping; Titanium; UV shielding; 傅立叶变换红外光谱; 制备; 掺杂氧化铈; 硅涂层; 紫外屏蔽性能; 纳米颗粒; 透射电子显微镜; 钛掺杂; ceria nanoparticles; titania doping; UV shielding; silica coating; salt-assisted solution combustion synthesis; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(10)60547-9

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.