Liu Xue-feng, Zhang Li, Tu Ming-jing
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Feb;25(2):274-6.
Ce-loaded nano-TiO2 was prepared by the loading technology of metallic ions, and was characterized by XRD and TEM. The UV-Vis reflective spectra of nano-TiO2 and Ce-loaded nano-TiO2 were analyzed. The result shows that after loading rare earth element Ce the reflective spectral characteristic of nano-TiO2 moves to the visible region with a red shift to 500 nm, and the obvious change takes place in the absorbance in the visible spectral range with a three-fold enhancement. It is indicated that the load of rare earth element Ce is favorable to enhancing the absorption of visible and UV light of anatase nano-TiO2, and thereby greatly increases its photocatalytic activity.
采用金属离子负载技术制备了铈负载纳米二氧化钛，并通过X射线衍射仪（XRD）和透射电子显微镜（TEM）对其进行了表征。分析了纳米二氧化钛和铈负载纳米二氧化钛的紫外-可见反射光谱。结果表明，负载稀土元素铈后，纳米二氧化钛的反射光谱特征向可见光区域移动，红移至500nm，且在可见光谱范围内吸光度发生明显变化，增强了三倍。表明稀土元素铈的负载有利于提高锐钛矿型纳米二氧化钛对可见光和紫外光的吸收，从而大大提高其光催化活性。
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