TiO₂/ZnO nanowire arrays on stainless steel mesh for piezo-photocatalytic H₂ production are synthesized via a two-step hydrothermal route. The photocatalytic H₂ production efficiency under solar illumination can be enhanced by introducing mechanical vibration energy. As coutilizing the solar and mechanical energy (ultrasonic irradiation), the nanowires show high H₂ production. The nanowire arrays also show excellent recyclability and stability. Additionally, this mesh-based structure can be retrieved easily from aqueous solution, which can meet the practical application demand. The working mechanism can be attributed to the piezo-photocatalytic effect, in which the piezoelectric field of bent ZnO nanowires and the built-in electric field of TiO₂/ZnO heterostructures can efficiently separate the photogenerated electrons and holes for effectively producing H₂. Present results provide a new strategy for developing photocatalytic H₂ production techniques.

中文翻译：

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压电和光催化作用共同利用太阳能和机械能提高TiO ₂ / ZnO纳米线的H ₂产生

通过两步水热法合成了不锈钢网上的TiO ₂ / ZnO纳米线阵列，用于压电光催化生产H ₂。通过引入机械振动能可以提高在太阳照射下光催化H _2的生产效率。随着太阳能和机械能（超声波辐射）的共同利用，纳米线显示出​​高H ₂生产。纳米线阵列还显示出出色的可回收性和稳定性。另外，这种基于网孔的结构可以很容易地从水溶液中回收，可以满足实际的应用需求。该工作机理可以归因于压电光催化作用，其中弯曲的ZnO纳米线的压电场和TiO ₂ / ZnO异质结构的内置电场可以有效地分离光生电子和空穴，从而有效地产生H ₂。目前的结果提供了开发光催化H ₂生产技术的新策略。