It has been proved to be an effective route to efficiently ameliorate photocatalytic performance of catalysts via designing three-dimensional (3D) hierarchical nanostructures and constructing oxygen vacancies (V_Os). However, controlling the self-assembly of organization into 3D hierarchical nanostructures while introducing V_Os in photocatalysts remains a challenge. Herein, we reported an ethylene glycol (EG) mediated approach to craft 3D hydrangea-structure Bi₂MoO₆ with V_Os for efficient photocatalytic degradation of tetracycline. Through manipulating the EG concentration during the fabrication process, the influence of EG concentration on the Bi₂MoO₆ structure was systematically investigated. EG could promote the self-assembly of Bi₂MoO₆ nanosheets to form a 3D hierarchical structure. Compared with 2D nanoplates, 3D hierarchical architecture enhanced the surface area and the amount of active sites of Bi₂MoO₆. In addition, the reduction effect of EG on metallic oxide enabled the generation of V_Os in Bi₂MoO₆. The V_Os adjusted the electronic structure of Bi₂MoO₆, which not only enhanced the light harvesting, but also facilitated the simultaneous utilization of photo-induced electrons and holes to form reactive oxygen species (·O²⁻ and ·OH) for the efficient tetracycline decomposition. 3D Bi₂MoO₆ hydrangea with V_Os achieved a 79.4% removal efficiency of tetracycline after 75 min. This work provides a simple yet robust EG-mediated strategy, which not only promotes the self-assembly of nano-catalysts into 3D hierarchical architectures, but also crafts tunable V_Os for highly efficient photocatalysis.

事实证明，通过设计三维（3D）分层纳米结构和构建氧空位（V _Os）是有效改善催化剂光催化性能的有效途径。_{然而，在光催化剂中引入 V Os}的同时控制组织自组装成 3D 分层纳米结构仍然是一个挑战。在此，我们报道了一种乙二醇（EG）介导的方法，用 V _{Os制作 3D 绣球花结构 Bi 2} MoO ₆，以有效光催化降解四环素。通过在制备过程中控制EG浓度，系统地研究了EG浓度对Bi ₂ MoO _{6结构的影响。EG可以促进Bi 2} MoO ₆纳米片的自组装形成3D分层结构。_{与2D纳米板相比，3D分层结构增加了Bi 2} MoO ₆的表面积和活性位点的数量。此外，EG对金属氧化物的还原作用使得Bi ₂ MoO ₆中能够生成V _Os。V _{Os调整了 Bi 2} MoO ₆的电子结构，不仅增强了光捕获，而且有利于同时利用光生电子和空穴形成活性氧（·O ²⁻和·OH）。高效分解四环素。具有V _Os的3D Bi ₂ MoO ₆绣球花75分钟后对四环素的去除效率达到79.4%。这项工作提供了一种简单而强大的 EG 介导策略，不仅促进纳米催化剂自组装成 3D 分层结构，而且还制作了可调节的 V _Os以实现高效光催化。