期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 36, 期 4, 页码 349-359出版社
SPRINGER
DOI: 10.1007/s11164-010-0145-2
关键词
Mesoporous; TiO2; N, B, Si-tridoped; High surface area; Photocatalyst
资金
- National Nature Science Foundation of China [20773039, 20977030]
- National Basic Research Program of China (973 Program) [2007CB613301, 2010CB732306]
- Ministry of Science and Technology of China [2006AA06Z379, 2006DFA52710]
N, B, Si-tridoped mesoporous TiO2, together with N-doped, N, B-codoped and N, Si-codoped TiO2, was prepared by a modified sol-gel method. The samples were characterized by wide-angle X-ray diffraction (WAXRD), N-2 adsorption-desorption, transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, UV-visible adsorbance spectra (UV-vis) and X-ray photoelectron spectra (XPS). The N, B, Si-tridoped mesoporous TiO2 showed small crystallite size, large specific surface area (350 m(2)/g), uniform pore distribution (3.2 nm) and strong absorption in the visible light region. The photocatalytic activities of the samples were evaluated by the photodegradation of 2,4-dichlorophenol (2,4-DCP) aqueous solution. The N, B, Si-tridoping sample exhibited much higher photocatalytic activity compared with other synthesized photocatalysts. The high activity could be attributed to the strong absorption in the visible light region, large specific surface area, small crystallite size, large amount of surface hydroxyl groups, and mesoporosity.
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