Enhanced Photocatalytic Performance for the BiPO4鈥?i>x Nanorod Induced by Surface Oxygen Vacancy
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- 作者：Yanhui Lv ; Yanyan Zhu ; Yongfa Zhu
- 刊名：Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：September 12, 2013
- 年：2013
- 卷：117
- 期：36
- 页码：18520-18528
- 全文大小：617K
- 年卷期：v.117,no.36(September 12, 2013)
- ISSN：1932-7455
文摘
The BiPO4鈥?i>x nanorod with surface oxygen vacancy was fabricated via vacuum deoxidation. The concentration and kind of oxygen vacancy could be controlled by tuning the deoxidation temperature and time in vacuum. The photocatalytic activity depended on the concentration and kind of surface oxygen vacancy, and the optimum photocatalytic activity and photocurrent of the BiPO4鈥?i>x nanorod was about 1.5 and 2.5 times as high as that of pure BiPO4, respectively. Besides, the photocatalytic response wave range of the BiPO4鈥?i>x nanorod has been expanded to more than 365 nm. The enhancement of photocatalytic activity is attributed to the high separation efficiency of photoinduced electron鈥揾ole pairs due to the broadening of the valence band (VB) induced by surface oxygen-vacancy states, and the extending of photoresponse is considered to be the narrowing of energy band gap resulting from the rise of the valence band maximum (VBM).