Abstract Wet chemical process is difficult to synthesize piezophotocatalyst with a designed composition especially for alkali-based piezoelectric materials, which limits the optimization of the piezoelectric response. Here, by directly using solid-state synthetic lead-free (K0.48Na0.52)NbO3-(Bi0.5Na0.5)ZrO3 piezoelectric ceramic powder with specific cuboid shape, we report for the first time an efficient oxidative desulfurization where about 92.3% of dibenzothiophene is removed within 2h under ultraviolet–visible (UV–vis) light irradiation. Moreover, completely organic degradation of the Rhodamine B (RhB) within 10 min under UV–vis light irradiation can be achieved by using slightly Ag-decorated powders. The main reason for this novel multipiezophotocatalytic ability is partially due to the high piezoelectric energy into chemical transformations and partially due to the cuboid morphology with exposed high active surface. The strategy in this work is expected to drive the discovery of a family of promising multi-piezophotocatalysts with high efficiency, low-cost, and large-scale fabrication ability.

中文翻译：

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高压无铅陶瓷粉体：一种高效环保的多功能光催化剂

摘要 湿化学法难以合成具有设计成分的压电光催化剂，特别是针对碱基压电材料，限制了压电响应的优化。在这里，通过直接使用具有特定长方体形状的固态合成无铅 (K0.48Na0.52)NbO3-(Bi0.5Na0.5)ZrO3 压电陶瓷粉末，我们首次报道了一种高效的氧化脱硫，其中约 92.3在紫外-可见光 (UV-vis) 光照射下，2 小时内去除 % 的二苯并噻吩。此外，在紫外-可见光照射下，罗丹明 B (RhB) 在 10 分钟内完全有机降解，可以通过使用轻微的银装饰粉末来实现。这种新型多压电光催化能力的主要原因部分是由于高压能转化为化学转化，部分是由于长方体形态和暴露的高活性表面。这项工作中的策略有望推动发现一系列具有高效率、低成本和大规模制造能力的有前途的多压电光催化剂。