RSC Advances
Paper
In summary, we demonstrated that the photocatalytic 15 Y. Nosaka, S. Takashi, H. Sakamoto and A. Y. Nosaka, J. Phys.
activity of WO can be signicantly enhanced by the surface Chem. C, 2011, 115, 21283–21290.
modication of an ionic liquid [Bmim]I through a facile 16 X. An, J. C. Yu, Y. Wang, Y. Hu, X. Yu and G. Zhang, J. Mater.
impregnation method. Various characterization results showed Chem., 2012, 22, 8525–8531.
that the [Bmim]I is tightly bound to the surface of WO . It was 17 Z.-G. Zhao and M. Miyauchi, J. Phys. Chem. C, 2009, 113,
3
3
+
revealed that the presence of the surface-bound [Bmim] could
6539–6546.
effectively inhibit the recombination of photogenerated elec- 18 T. Welton, Chem. Rev., 1999, 99, 2071–2083.
tron–hole pairs by trapping the electrons photoexcited on the 19 R. Katoh, M. Hara and S. Tsuzuki, J. Phys. Chem. B, 2008, 112,
conduction band, which is responsible for the observed
15426.
enhancement of the photocatalysis. In addition, the [Bmim]I- 20 X. Meng and F.-S. Xiao, Chem. Rev., 2014, 114, 1521–1543.
modied WO3 exhibits sufficient stability and long-lasting 21 S. Hu, A. Wang, X. Li, Y. Wang and H. L ¨o we, Chem.–Asian J.,
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development of narrow band gap semiconductors with a deep 14300–14308.
2010, 5, 1171–1177.
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This work was supported by National Natural Science Founda-
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