The development of advanced photoactive materials has aroused widespread interest, but is severely plagued by the inherent narrow photo-responsive range and rapid recombination of electrons and holes. In this study, the unconventional BiOBr nanosheets decorated with Bi and oxygen vacancies (OVs) are successfully synthesized through a facial one-pot hydrothermal method, followed by heat treatment. Cetyltrimethylammonium bromide and mannitol contribute to the selective exposure of (001) and (010) facets, respectively. The absence of the outermost Br atoms facilitates the simultaneous generation of OVs and Bi on the surface during heating, forming the Schottky junction. The synergy of SPR in the Bi metal, OVs and Schottky junction can effectively enhance the light absorption and charge separation. This work proposes and verifies a feasible approach to construct defects in-situ by regulating the crystal facets and manipulating the surface atomic arrangement and coordination.

中文翻译：

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BiOBr 纳米片中氧空位和等离子体 Bi 的面依赖性原位形成及其对电荷载流子的产生和分离的影响

先进光活性材料的开发引起了广泛的兴趣，但其固有的窄光响应范围和电子与空穴的快速复合受到严重困扰。在这项研究中，通过面部一锅水热法成功合成了装饰有Bi和氧空位（OV）的非常规BiOBr纳米片，然后进行热处理。十六烷基三甲基溴化铵和甘露醇分别有助于选择性暴露 (001) 和 (010) 面。最外层 Br 原子的缺失有利于加热过程中表面同时生成 OV 和 Bi，形成肖特基结。 Bi金属、OV和肖特基结中SPR的协同作用可以有效增强光吸收和电荷分离。这项工作提出并验证了一种通过调节晶面和操纵表面原子排列和配位来原位构建缺陷的可行方法。