A facile approach was developed for the synthesis of ultrathin ZnS–ZnO nanosheets. By simply manipulating the synthesis temperature, ZnS–ZnO composite nanosheets with sulfur vacancies were successfully obtained using ZnS(en)_0.5 as the precursor. The formation of the ZnS–ZnO composite leads to the creation of a heterojunction at the interface between the two materials, which enhances the separation of piezogenerated electrons and holes. Additionally, sulfur vacancies are concurrently introduced into the ZnS lattice during the heat treatment process. This defective ZnS with sulfur vacancies exhibits a narrowed bandgap and low excitation energy. Consequently, the defective ZnS–ZnO composite nanosheets demonstrate much higher piezocatalytic activity compared to ZnS and ZnO catalysts, surpassing the performance of most reported piezocatalysts. Furthermore, the ZnS–ZnO composite nanosheets maintain stability over five cycles of catalytic reactions. The study offers a promising approach for enhancing piezocatalytic performance for H₂ production.

中文翻译：

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易于合成有缺陷的 ZnS-ZnO 复合纳米片用于高效压电催化 H2 生产


开发了一种合成超薄 ZnS-ZnO 纳米片的简单方法。通过简单地操纵合成温度，以 ZnS（en）_0.5 为前驱体，成功获得了具有硫空位的 ZnS-ZnO 复合纳米片。ZnS-ZnO 复合材料的形成导致在两种材料之间的界面处产生异质结，从而增强压电产生的电子和空穴的分离。此外，在热处理过程中，硫空位同时被引入 ZnS 晶格中。这种具有硫空位的缺陷 ZnS 表现出狭窄的带隙和低激发能。因此，与 ZnS 和 ZnO 催化剂相比，有缺陷的 ZnS-ZnO 复合纳米片表现出更高的压电催化活性，超过了大多数报道的压电催化剂的性能。此外，ZnS-ZnO 复合纳米片在催化反应的五个循环中保持稳定性。该研究为提高 H₂ 产生的压电催化性能提供了一种有前途的方法。