Al-Keisy Amar, Ren Long, Zheng Tian, Xu Xun, Higgins Michael, Hao Weichang, Du Yi
Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, NSW 2525, Australia.
Dalton Trans. 2017 Nov 14;46(44):15582-15588. doi: 10.1039/c7dt03193a.
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 BiSiO 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.
铁电材料的光催化活性受到源于自发极化的电荷分离主方向的高度影响。在这项工作中，成功构建了独特的基于硅酸铋的零维（0D）/二维（2D）异质纳米结构。与单独的原始相相比，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BiSiO纳米片中的高极化与异质结构0D-2D界面处的能带弯曲的协同效应已被证明可加速光生电荷分离以及分离载流子向界面的移动，这进一步提高了光降解性能。这项工作为调整铁电材料中的光生载流子转移路径以及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策略。
