Due to the synergistic properties of piezoelectric and photocatalysis, piezo-photocatalysts provide a new solution for the charge carriers produced during the reaction and can show higher efficiency in reducing environmental pollutants. The new aspect of photocatalysis is that photocatalysis uses sunlight to convert toxic mineral species into less dangerous ones. Also, the new aspect of piezoelectricity is that when the piezoelectric material is subjected to mechanical stress, the induced displacement of ions creates net electric charges throughout the material. In this paper, the calcined bimetallic sample (CBM-150) is a sample of BiFeO3 prepared at low temperature, that is partially derived from the Fe/Bi-BDC framework. The innovation of the used CBM-150 catalyst is that this catalyst was able to provide a new strategy to increase the charge separation efficiency of electron/hole pairs produced during the reaction through the synergy of piezoelectric and photocatalytic properties. The innovation of the CBM-150 catalyst is such that it was able to show 89% and 91% efficiency for Cr(VI) reduction in 40 minutes at neutral pH with a 20 W Xenon lamp and sunlight irradiation. CBM-150 also successfully produced 109.04 µmol.L-1.g-1.h-1 green ammonia through nitrogen fixation reaction. Finally, CBM-150 is an effective and low-cost piezo-photocatalyst that can be a promising candidate for the Cr(VI) reduction and efficient green ammonia production.

中文翻译：

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Fe/Bi-BDC 框架部分 MOF 衍生的 BiFeO3 在可见光下高效压电催化还原 Cr（VI） 和 N2 固定


由于压电和光催化的协同特性，压电光催化剂为反应过程中产生的载流子提供了一种新的解决方案，并且可以在减少环境污染物方面表现出更高的效率。光催化的新方面是光催化利用阳光将有毒矿物物种转化为危险性较低的矿物物种。此外，压电的新方面是，当压电材料受到机械应力时，离子的感应位移会在整个材料中产生净电荷。在本文中，煅烧双金属样品 （CBM-150） 是在低温下制备的 BiFeO3 样品，部分来源于 Fe/Bi-BDC 框架。所用 CBM-150 催化剂的创新之处在于，该催化剂能够提供一种新的策略，通过压电和光催化特性的协同作用，提高反应过程中产生的电子/空穴对的电荷分离效率。CBM-150 催化剂的创新之处在于，它能够在中性 pH 值下使用 20 W 氙灯和阳光照射在 40 分钟内分别显示出 89% 和 91% 的 Cr（VI） 还原效率。CBM-150 也成功生产了 109.04 μmol。L-1.g-1.h-1 绿氨通过固氮反应。最后，CBM-150 是一种有效且低成本的压电光催化剂，可以成为 Cr（VI） 还原和高效绿氨生产的有前途的候选者。