Hao S.,Zhejiang Normal University |
Lv L.,Zhengjiang Normal University |
Li Q.,Zhengjiang Normal University |
Wang F.,Zhengjiang Normal University |
Lu B.,Zhengjiang Normal University
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | Year: 2011
The porous Ce 1-xNd xO 2-y solid solutions were synthesized by microwave-induced combustion process using cerium nitrate hexahydrate, neodymium nitrate hexahydrate and urea as raw materials. The powders were characterized by X-ray diffraction (XRD), Laser Raman spectrum, FT-IR spectrum , field-emission scanning electron micrography (FE-SEM), N 2 adsorption-desorption technology, UV-vis and so on. The XRD analysis revealed that the grain size of Ce 1-xNd xO 2-y varied between 40 and 60 nm and all of the samples had the structure of fluorite. The Raman results showed that the oxygen vacancy was produced in Ce 1-xNd xO 2-y crystal lattices and the concentration of oxygen vacancy was increased with Nd 3+ doping. The results of FT-IR exhibited that the absorption band of Ce-O bond rose around 1400 cm -1 and the IR absorption band of 2346 cm -1 disappeared because of Nd 3+ doping. From SEM and N 2 adsorption-desorption results, it could be seen that the porous structure was obtained. The results of UV-vis and photocatalytic activity indicated that the UV absorption was improved due to Nd 3+doping in the Ce 1-xNd xO 2-y, and the visible light could be absorbed remarkably because of the porous structure and oxygen vacancy.