1. Spontaneous polarization enhanced bismuth ferrate photoelectrode: fabrication and boosted photoelectrochemical water splitting property
- Author
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Yan Zhang, Jianqiang Yu, Yukun Zhu, Xiaolong Yang, Yanhua Peng, Jian Liu, and Wei Jiao
- Subjects
Fabrication ,Materials science ,business.industry ,Graphene ,Oxide ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Ferroelectricity ,law.invention ,Bismuth ,chemistry.chemical_compound ,chemistry ,law ,Electric field ,Optoelectronics ,Water splitting ,Polarization (electrochemistry) ,business - Abstract
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.
- Published
- 2021