Nitrogen doped anatase TiO2 sheets with dominant {001} facets for enhancing visible-light photocatalytic activity

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作者：
机构：
[1] Fan, Yanhua
[2] Ma, Chunhua
[3] Liu, Boyang
[4] Chen, Haiyan
[5] Dong, Lihua
[6] Yin, Yansheng
来源：
Fan, Y. (fyhxu2003@163.com) | 1600年 / Elsevier Ltd卷 / 27期
关键词：
Dominant {001} facets - Electrons and holes - Hydrothermal process - Ion doping - Nitrogen-doped - Separation efficiency - Synthetic methods - Visible light photocatalytic activity;
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摘要：
The photocatalytic activity of TiO2 can be mainly improved from three approaches: (1) enhancing surface energy; (2) increasing availability of visible light and (3) improving the separation efficiency of photo-induced electrons and holes. Here, we report a one-step route to obtain nitrogen (N) doped TiO2 sheets with dominant {001} facets by a hydrothermal process. The XRD patterns confirm the better crystallinity. XPS spectrums show nitrogen acting as interstitial N or an O-Ti-N structure in TiO2 sheets. Compared with that of TiO2 sheets, the N doped TiO 2 sheets not only absorb visible light, but also have a large percentage of high reactive {001} facets, so the photocatalytic activities are greatly enhanced, as confirmed by the decomposition of methylene orange. © 2014 Elsevier Ltd.
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