期刊
DALTON TRANSACTIONS
卷 46, 期 44, 页码 15363-15372出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt03057f
关键词
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资金
- National Natural Science Foundation of China [51072032, 51372036, 51102001, 11504266, 51702235]
- Key Project of Chinese Ministry of Education [113020A]
- National Key Foundation for Exploring Scientific Instrument of China [2014YQ120351]
- Tianjin Natural Science Foundation [15JCYBJC16800, 15JCYBJC16700]
- Open project program key Laboratory of UV-Emitting Materials and Technology of Ministry of Education [130028698, 130028604]
Doping and tailoring of the crystal orientation are two main strategies to improve the photocatalytic properties of TiO2 films. Herein, we introduce a novel route for obtaining Nb-doped TiO2 anatase films with the [001] preferred orientation by thermal oxidation of the [100]-oriented Nb-doped TiN film prepared by magnetron sputtering. Comprehensive analyses with X-ray diffraction, Raman scattering, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy indicate that the proportion of high-energy (001) facets of the Nb-doped TiO2 film is more than 90% and the Nb5+ ion is successfully doped into the film without destroying the crystallinity and orientation. Moreover, the Nb5+ ion doping significantly restrains the growth of the TiO2 grains and increases the surface roughness, and consequently increases the surface-reactive sites. Therefore, the as-fabricated Nb-doped TiO2 film exhibits efficient photocatalytic oxidation performance for acetaldehyde and oleic acid decomposition under simulated solar light irradiation. Such Nb-doped TiO2 anatase films with high-reactivity (001) facet exposure may find applications in the photocatalysis and solar energy conversion fields.
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