期刊
CHEMICAL ENGINEERING JOURNAL
卷 151, 期 1-3, 页码 220-227出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2009.02.030
关键词
Titanium dioxide; Nanoparticles; Flame spray pyrolysis; Photocatalytic activity; V doping
资金
- National High Technology Research and Development Program of China [2006AA03Z358]
- National Natural Science Foundation of China [20706015, 50703009]
- Shanghai Rising-Star Program [06QA14013, 07QA14014]
- Major Basic Research Project of Shanghai [07DJ14001]
- Ph.D. Programs Foundation of Ministry of Education of China [20070251022]
- Special Projects for Key Laboratories in Shanghai [07DZ22016, 06DZ22008]
- Special Projects for Nanotechnology of Shanghai [0752nm010, 0652nm034]
V-doped TiO2 (V-TiO2) nanoparticles were prepared by a simple one-step flame spray pyrolysis (FSP) technique. The obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectra, UV-vis absorption spectroscopy, and nitrogen adsorption-desorption methods. Benefiting from the short residence time and high quenching rate during the flame spray process, V4+ ions are successfully incorporated into the crystal lattice of TiO2. It reveals that V doping favors the primary particle size growth as well as the increase of rutile content in the products. The photocatalytic activity of the V-TiO2 samples under UV and visible light irradiation were evaluate by the photocatalytic degradation of methylene blue (MB) and 2,4-dichlorophenol (2,4-DCP), respectively. It was found that V doping enhances the photocalytic activity under both UV and visible light irradiation. Especially, under visible light irradiation, the degradation rate of 2,4-dichlorophenol over 1%V-TiO2 is two times higher than that over undoped TiO2. The photocatalytic mechanisms for V-TiO2 samples under UV and visible light irradiation were tentatively discussed. (C) 2009 Elsevier B.V. All rights reserved.
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