In this paper, the fabrication of a highly orientated Bi₂Fe₄O₉ (BFO) photoelectrode in the presence of two-dimensional (2D) graphene oxide (GO) was reported. It was found that the GO can be used as a template for controlling the growth of BFO, and the nanoplate composites of BFO/reduced graphene oxide (RGO) with a high orientation can be fabricated. The thickness of the nanoplates became thinner as the ratio of GO increased. As a result, the ferroelectric spontaneous polarization unit arranges itself in the space in a periodic manner, leading to the formation of a polarization field along a special direction. Therefore, the created built-in electric field of the nanoplate composites of BFO/RGO is improved upon the increase of the amount of RGO. As expected, carrier separation is enhanced by the built-in electric field, therefore substantially enhancing the photoelectrochemical (PEC) activity of water splitting compared to pure BFO under the irradiation of visible-light.

在本文中，制备高度取向的 Bi ₂ Fe ₄ O ₉报道了二维 (2D) 氧化石墨烯 (GO) 存在下的 (BFO) 光电极。结果表明，GO可以作为模板来控制BFO的生长，并且可以制备具有高取向的BFO/还原氧化石墨烯（RGO）的纳米板复合材料。随着 GO 比例的增加，纳米板的厚度变得更薄。结果，铁电自发极化单元以周期性方式在空间中排列自身，导致沿特定方向形成极化场。因此，随着RGO量的增加，BFO/RGO纳米板复合材料的内建电场得到改善。正如预期的那样，内置电场增强了载流子分离，