本文制备了富含氧空位（V O）的花状Ni-Fe层状双氢氧化物（V O -Ni-Fe-LDH），用于活化过一硫酸盐（PMS）以去除盐酸四环素（TC）。充分的实验探索和密度泛函理论（DFT）计算清楚地证明了3D形态阻止了V2O-Ni-Fe-LDH和V2O的聚集改变了表面的电子状态。因此，V O -Ni-Fe-LDH/PMS不仅反应速率常数比Ni-Fe-LDH/PMS提高了4倍，而且在连续流动实验中表现出稳定高效的性能，高达4.5 H。淬火试验和EPR实验证明，TC的降解主要是单线态氧( 1 O 2 )，而不是传统LDH催化剂中的硫酸根或羟基自由基。通过液相色谱-质谱联用技术对TC氧化过程中的化学中间体进行了鉴定，并为系统优化提供了降解路径。在应用中，VO - Ni -Fe-LDH/PMS系统能够承受水基质、各种pH值的影响，并有效去除真实医院废水中的污染物。这项工作强调了合理的结构设计与缺陷工程相结合在催化剂开发中的重要性，这具有先进催化的潜力。

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In this paper, oxygen vacancies (VO) enriched flower-like Ni-Fe layered double hydroxide (VO-Ni-Fe-LDH) was prepared for activating peroxymonosulfate (PMS) to remove Tetracycline hydrochloride (TC). Sufficient experimental exploration and density functional theory (DFT) calculations clearly demonstrated the 3D morphology prevented the aggregation of VO-Ni-Fe-LDH and VO alter the electronic state of the surface. Thus, VO-Ni-Fe-LDH/PMS not only showed a 4 times enhancement in the reaction rate constant in comparison to Ni-Fe-LDH/PMS, but also exhibited a stable and efficient performance in continuous flow experiment up to 4.5 h. Quenching test and EPR experiments proved that degradation of TC was dominated by singlet oxygen (1O2), rather than sulfate radicals or hydroxyl radicals found by traditional LDH catalysts. The Chemical intermediates in TC oxidation process were identified through liquid chromatography-mass spectrophotometry, and degradation paths were provided for system optimization. In application, the VO-Ni-Fe-LDH/PMS system was able to withstand the effects of the water matrix, various pH values and remove the contaminants from real hospital wastewater with efficiency. This work emphasized the significance of rational architectural design combined with defect engineering in catalyst development, which holds the potential for advanced catalysis.