The photocatalytic activity of ferroelectric materials is highly influenced by the main direction of charge separation, originating from spontaneous polarization. In this work, unique bismuth silicate based zero-dimensional (0D)/two-dimensional (2D) heterogeneous nanostructures were successfully constructed. In contrast to either individual pristine phase, this heterogeneous structure exhibited much enhanced photocatalytic activity towards the degradation of Rhodamine B and phenol. The synergistic effects of high polarization in 2D ferroelectric Bi₂SiO₅ nanosheets and the band bending at the 0D–2D interface of the heterostructures have been proved to accelerate the photoinduced charge separation and the movement of separated carriers to the interface, which further improves the photodegradation performance. This work provides a novel strategy for adjusting the photoinduced carrier transfer route in the ferroelectric materials and designing novel photocatalysts with ultrafast charge separation and large active surface area.

中文翻译：

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铁电非均相光催化剂Bi ₄（SiO ₄）₃ / Bi ₂ SiO ₅纳米结构中电荷分离的增强

铁电材料的光催化活性受到自发极化作用的主要电荷分离方向的影响。在这项工作中，成功地构建了独特的基于硅酸铋的零维（0D）/二维（2D）异质纳米结构。与任何一个原始相相反，这种异质结构对罗丹明B和苯酚的降解表现出大大增强的光催化活性。二维铁电Bi ₂ SiO ₅中高极化的协同效应纳米片和异质结构在0D–2D界面处的能带弯曲已被证明可加速光致电荷的分离以及分离的载流子向界面的移动，从而进一步提高了光降解性能。这项工作为调节铁电材料中的光生载流子转移途径和设计具有超快电荷分离和大活性表面积的新型光催化剂提供了一种新颖的策略。