National Laboratory of Solid State Microstructures, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China and Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093, China.
National Laboratory of Solid State Microstructures, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China and Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093, China and College of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 22401, P. R.China.
Nanoscale. 2018 Jan 25;10(4):1905-1911. doi: 10.1039/c7nr06279f.
Herein, orthorhombic regular BiTaOCl square nanoplates with an edge length of about 500 nm and a thickness of about 100 nm were successfully synthesized using a facile molten salt route. The as-prepared square nanoplates have been proven to be of {001} crystal facets as two dominantly exposed surfaces. The density functional theory calculation and photo-deposition of noble metal experiment demonstrate the electron and hole separation on different crystal facets and reveal that {001} crystal facets are in favor of the reduction reaction. Since the square nanoplate structure exhibits dominant exposure surfaces of the {001} facets, the molten salt route-based samples basically possess an obviously higher photocatalytic activity than those prepared by the solid state reaction (SSR) method. This study may provide inspiration for fabricating efficient photocatalysts.
本文采用简便的熔融盐法成功合成了边长约为 500nm、厚度约为 100nm 的四方晶系规则 BiTaOCl 纳米片。所制备的纳米片具有{001}晶面作为两个主要暴露表面。密度泛函理论计算和贵金属光沉积实验证明了不同晶面的电子和空穴分离，并揭示了{001}晶面有利于还原反应。由于四方纳米片结构表现出{001}晶面的主导暴露表面，基于熔融盐路线的样品基本上具有比通过固态反应（SSR）方法制备的样品明显更高的光催化活性。这项研究可能为制备高效光催化剂提供启示。
