Simultaneously integrating mesocrystalline stacking superstructures, porous nanosheets and defective oxygen vacancies (OVs) into BiOCl crystals is an available strategy to enhance the visible-light-driven photocatalytic activity. Herein, we report a facile etching agent-assisted hydrothermal approach to achieve one-pot fabrication of mesocrystalline BiOCl porous nanosheet stacking superstructures with defective OVs, which show high catalytic activities towards to the visible-light-driven degradation of organic dyes. The formation of stacking superstructure in a mesocrystalline BiOCl is responsibility for increasing the transport of charge carriers. Experimental results and theoretical calculations suggest that the presence of OVs is beneficial to tuning the energy band structure for the improvement of visible light harvesting, prolonging the lifetime and enhancing the oxidation activity of photogenerated charge carriers. Additionally, the porous morphology and thin nanosheet building block could supply abundant active sites for photocatalysis. This research might arouse in-depth investigations on the development of novel precursor-modified strategy for the synthesis of high-active BiOX (X = Cl, Br and I)-based photocatalysts.

同时将介晶堆叠的超结构，多孔纳米片和有缺陷的氧空位（OVs）整合到BiOCl晶体中是提高可见光驱动的光催化活性的可用策略。在这里，我们报告了一种简便的蚀刻剂辅助水热方法，以实现一锅式制造具有缺陷OV的中晶BiOCl多孔纳米片堆叠的超结构，该超结构对可见光驱动的有机染料降解表现出高催化活性。在介晶BiOCl中形成堆叠超结构是增加电荷载流子传输的原因。实验结果和理论计算表明，OVs的存在有利于调节能带结构以改善可见光的收集，延长寿命并增强光生电荷载体的氧化活性。另外，多孔形态和薄的纳米片构造块可以提供丰富的光催化活性位。这项研究可能会引起对新型前驱体修饰策略的发展的深入研究，该策略用于合成高活性BiOX（X = Cl，Br和I）基光催化剂。