期刊
APPLIED SURFACE SCIENCE
卷 257, 期 1, 页码 227-231出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2010.06.071
关键词
Nd-doped; Hollow sphere; Titania; Photocatalysis; Dye; Visible light
类别
资金
- National Natural Science Foundation of China [50830304, 40871227, BK2008041]
- China Postdoctoral Science Foundation [20090450133]
- Fundamental Research Funds for the Central Universities [2010B05114]
Nd-doped titania hollow spheres were prepared using carbon spheres as template and Nd-doped titania nanoparticles as building blocks. The Nd-doped titania nanoparticles were synthesized at low temperature. The prepared hollow spheres were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectrum (DRS). The effects of Nd content on the physical structure and photocatalytic activities of doped titania hollow sphere samples were investigated. Results showed that there was an optimal Nd-doped content (3.9 at.%) for the photocatalytic degradation of dye X-3B (C.I. Reactive Red 2). The apparent rate constant of the best one was almost 9 times as that of P25 titania. The mechanism of photocatalytic degradation of dyes under visible light irradiation was also discussed. (C) 2010 Elsevier B. V. All rights reserved.
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