Switching Photocatalytic H2 and O2 Generation Preferences of Rutile TiO2 Microspheres with Dominant Reactive Facets by Boron Doping

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• 作者：Ting-Ting Wu ; Ying-Peng Xie ; Li-Chang Yin ; Gang Liu ; Hui-Ming Cheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：January 8, 2015
• 年：2015
• 卷：119
• 期：1
• 页码：84-89
• 全文大小：415K
• ISSN：1932-7455

文摘

Revealing the key factors of controlling the reduction and oxidation half reactions of photocatalysis is necessary in order to obtain the implications for designing and developing efficient photocatalysts. In this work, boron-doped TiO₂ microspheres consisting of rutile nanorods with the top reactive {111} facets were synthesized by the acidic hydrolysis of TiB₂. The thermal diffusion of boron from the inner to surface part of the microspheres results in switching of the preference from photocatalytic H₂ evolution to O₂ evolution. This switching is caused by the downward shift of surface band edges with the incorporation of boron in surface.