Domain observation in the visible-light photocatalyst Bi4NbO8Br with the layered perovskite structure
Domain observation in the visible-light photocatalyst Bi4NbO8Br with the layered perovskite structure
复制标题
DOI：
10.35848/1882-0786/abb287
复制
发表时间：
2020-09
影响因子：
2.3
通讯作者：
C. Zhong;Daichi Mizushima;Kaito Hirata;Y. Ishii;K. Kurushima;Daichi Kato;H. Nakajima;S. Mori;Hajime Suzuki;Kanta Ogawa;R. Abe;T. Fukuma;H. Kageyama
中科院分区：
文献类型：
--
作者：
C. Zhong;Daichi Mizushima;Kaito Hirata;Y. Ishii;K. Kurushima;Daichi Kato;H. Nakajima;S. Mori;Hajime Suzuki;Kanta Ogawa;R. Abe;T. Fukuma;H. Kageyama
层状钙钛矿型卤氧化物Bi 4 MO 8X（M = Nb，Ta; X = Cl，Br）是一种很有前途的可见光催化剂，其极性结构可以提高光生载流子的导电性。利用压电响应力显微镜和透射电子显微镜研究了Bi_4NbO_8Br单晶的畴结构。我们观察到一个罕见的畴结构，铁电180°畴的纳米铁弹90°畴在ab平面上发展。我们还讨论了这些畴结构对光生载流子动力学的影响，这可能为高活性光催化剂的设计提供新的思路。
Layered perovskite oxyhalides Bi4MO8X (M = Nb, Ta; X = Cl, Br) are promising visible-light photocatalysts for water splitting, where the polar structure may enhance the conductivity of photocarriers. In this study, the domain structure of Bi4NbO8Br single crystal was investigated using piezoresponse force microscopy and transmission electron microscope. We observed a rare domain structure with a ferroelectric 180° domain in the nanoscale ferroelastic 90° domains developed in the ab plane. We also discuss the effect of these domain structures on the dynamics of photocarriers, which may provide new ideas for the design of highly active photocatalyst.