Controllable Synthesis of Hexagonal WO₃ Nanoplates for Efficient Visible-Light-Driven Photocatalytic Oxygen Production

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• 作者：Yu Lei Wang ; Dr. Xue Lu Wang ; Dr. Yu Hang Li ; Li Jun Fang ; Jun Jie Zhao ; Xu Lei Du ; Prof. Dr. Ai Ping Chen and Prof. Dr. Hua Gui Yang
• 刊名：Chemistry – An Asian Journal
• 出版年：2017
• 出版时间：February 16, 2017
• 年：2017
• 卷：12
• 期：4
• 页码：387-391
• 全文大小：1031K
• ISSN：1861-471X

文摘

Facilitating charge-carrier separation and transfer is fundamentally important to improve the photocatalytic performance of semiconductor materials. Herein, two-dimensional hexagonal WO₃ nanoplates were synthesized by a two-step route: rapid evaporation and solid-phase sintering. The as-prepared WO₃ exhibits an enhanced activity of photocatalytic water oxidation compared to bulk monoclinic WO₃. The electron dynamics analysis reveals that a more efficient charge-carrier separation in the former can be obtained, the origin of which can be attributed to an increased number of surface defects in hexagonal WO₃ nanoplates. This work not only presents a novel and simple method to produce two-dimensional hexagonal WO₃ nanoplates, but also demonstrates that surface defects and two-dimensional geometric structures can promote the charge separation, which may be extended to the design of other efficient photocatalysts.