制备、表征、掺杂铈的二氧化钛空心球的光催化性能。
Preparation, characterization, photocatalytic properties of titania hollow sphere doped with cerium.
机构信息
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environmental Science and Engineering, Hohai University, Nanjing, 210098, China.
出版信息
J Hazard Mater. 2010 Jun 15;178(1-3):517-21. doi: 10.1016/j.jhazmat.2010.01.111. Epub 2010 Jan 25.
Ce-doped titania hollow spheres were prepared using carbon spheres as template and Ce-doped titania nanoparticles as building blocks. The Ce-doped titania nanoparticles were synthesized at low temperature. The prepared hollow spheres were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectrum (DRS). The effect of Ce content on the physical structure and photocatalytic properties of doped titania hollow sphere samples was investigated. Results showed that there was an optimal Ce-doped content (4%) for the photocatalytic activity of X-3B degradation. The apparent rate constant of the best one was almost 31 times as that of P25 titania. The mechanism of photocatalytic degradation of dyes under visible light irradiation was also discussed.
Ce 掺杂二氧化钛空心球是采用碳球作为模板，Ce 掺杂二氧化钛纳米粒子作为构筑块制备而成。Ce 掺杂二氧化钛纳米粒子在低温下合成。采用 X 射线衍射（XRD）、透射电子显微镜（TEM）、X 射线光电子能谱（XPS）和紫外-可见漫反射光谱（DRS）对空心球进行了表征。研究了 Ce 含量对掺杂二氧化钛空心球样品物理结构和光催化性能的影响。结果表明，在 X-3B 降解的光催化活性方面，Ce 的最佳掺杂含量（4%）。最佳样品的表观速率常数几乎是 P25 二氧化钛的 31 倍。还讨论了可见光照射下染料光催化降解的机理。
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