Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST) , Beijing 100083, China.
Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology, Lanzhou University , Gansu 730000, China.
ACS Nano. 2016 Feb 23;10(2):2636-43. doi: 10.1021/acsnano.5b07678. Epub 2016 Jan 13.
Effective piezoelectric semiconductor based hybrid photocatalysts are successfully developed by assembling TiO2 nanoparticles on ZnO monocrystalline nanoplatelets. The piezopotential can be introduced and tuned by thermal stress on the piezoelectric material of ZnO monocrystalline nanoplatelets through cooling hybrid photocatalysts from high temperature to room temperature with different rates based on the mismatched thermal expansion coefficient of the two materials, which can be used to engineer the heterojunction band structure and significantly enhance the photocatalytic performance in a wide range by improving charge separation. It is proposed that the piezotronic effect enhanced photocatalyst will provide a strategy for high-performance photocatalysis applications.
通过将 TiO2 纳米粒子组装在 ZnO 单晶纳米板上，成功开发出高效的压电半导体基混合光催化剂。通过以不同的速率将混合光催化剂从高温冷却到室温，可以在基于两种材料的热膨胀系数不匹配的基础上在 ZnO 单晶纳米板的压电材料上引入和调整压电势，从而可以用于工程异质结能带结构，并通过改善电荷分离显著提高在宽范围内的光催化性能。据提出，压电子增强型光催化剂将为高性能光催化应用提供一种策略。
