Piezocatalytic hydrogen peroxide (H2O2) production is an emerging and green technology, but complex preparation process of piezocatalyst and low production rate limit its practical application. Herein, we propose a straightforward and efficient strategy, that is, fabricating a novel terraced potassium sodium niobate (KNN-H) by integrating high-energy pendulum ball-milling into the conventional solid-state method, to control the morphology of piezocatalyst and boost its piezocatalytic activities. By exposing a large number of edge sites with higher piezoelectric response and more active sites, KNN-H sample exhibits an extremely high H2O2 production rate of 47 μmol/h, about 35 times higher than that of previously reported potassium niobate piezocatalyst. Besides, KNN-H sample also has good effects on dye degradation and bacterial inhibition. Therefore, our strategy provides a paradigm for large-scale fabrication of high-performance perovskite piezocatalysts.

中文翻译：

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阶梯状 （K， Na）NbO3 压电催化剂，具有优异的 H2O2 生产性能


压电催化过氧化氢 （H2O2） 生产是一种新兴的绿色技术，但压电催化剂制备工艺复杂、生产率低限制了其实际应用。在此，我们提出了一种简单有效的策略，即通过将高能摆球磨集成到常规固态方法中来制备一种新型阶梯式铌酸钾钠 （KNN-H），以控制压电催化剂的形态并提高其压电催化活性。通过暴露大量具有更高压电响应和更多活性位点的边缘位点，KNN-H 样品表现出 47 μmol/h 的极高 H2O2 产生速率，比以前报道的铌酸钾压电催化剂高约 35 倍。此外，KNN-H 样品对染料降解和细菌抑制也有很好的效果。因此，我们的策略为大规模制造高性能钙钛矿压电催化剂提供了一个范例。