Ferroelectric materials have multiple characteristics in ferroelectric, piezoelectric, pyroelectric properties, which provide an attractive prospect for simultaneously harvesting multiple energy sources for catalytic applications. However, the crucial challenge for wastewater purification lies in the development of ferroelectric materials with improved functions and the design of advanced oxidation processes. Herein, Sr_0.3Ba_0.7TiO₃ (SBT-0.3) nano-catalysts modified by PVP surfactant could significantly promote water recovery efficiency from the rhodamine B (RhB), which is as high as 98% by simultaneously collecting two types of energy sources of mechanical friction and temperature fluctuation from the natural environment for tribo-/pyro-catalysis under dark conditions. It was found that the samples containing PVP surfactant show significantly improved performance in the separation of charge carriers in comparison with those without PVP surfactant. The permanent polarization in SBT-0.3, coupled with the piezo-/pyro-potential, could generate internal field and therefore reduce charge recombination. It also helps to absorb charged species from the dye solution, which favors the reaction with active oxygen to cause the cleavage and breakdown of organic molecules. The mechanism of RhB decomposition mediated by SBT-0.3 ferroelectric is also discussed. This work favors us to in-depth understanding for the tribo-/pyro-catalysis and hence proposes a new strategy to improve the water purification efficiency of ferroelectric nanocrystals.

铁电材料在铁电，压电，热电特性方面具有多种特性，这为同时收集多种能源用于催化应用提供了诱人的前景。然而，废水净化的关键挑战在于开发功能改进的铁电材料和设计先进的氧化工艺。在此，Sr _0.3 Ba _0.7 TiO ₃PVP表面活性剂改性的（SBT-0.3）纳米催化剂可通过同时收集自然界中机械摩擦和温度波动的两种能源来显着提高若丹明B（RhB）的水回收效率，该效率高达98％。在黑暗条件下进行摩擦/焦催化的环境。发现与不含PVP表面活性剂的样品相比，含有PVP表面活性剂的样品在电荷载流子的分离方面显示出显着改善的性能。SBT-0.3中的永久极化，加上压电/热电势，可能会产生内部电场，因此会减少电荷复合。它还有助于从染料溶液中吸收带电物质，这有利于与活性氧发生反应，从而引起有机分子的裂解和分解。还讨论了由SBT-0.3铁电体介导的RhB分解的机理。这项工作有利于我们对摩擦/高温催化的深入理解，因此提出了提高铁电纳米晶体净水效率的新策略。