The role of oxygen vacancy (V_O) in catalyst is manifested to be positive in the Fenton-like process. However, rational modulation of V_O with a simple strategy for the efficient Fenton-like catalysts remains desirable and challenging. Here a facile heat treatment method without any additives was demonstrated to introduce V_O on mesoporous cobalt oxide (Co₃O₄) hollow nanospheres, which served as highly reactive and stable Fenton-like catalysts for recalcitrant organic pollutants (bisphenol A, BPA) degradation by activating peroxymonosulfate (PMS). The V_O-rich Co₃O₄ nanospheres exhibited superior BPA removal efficiency with high BPA degradation rate (0.0232 min⁻¹, 100 min). The concentration of V_O in Co₃O₄ was proved to act as an important role for the PMS activating efficiency. A series of mechanism studies, including radical scavengers, chemical probes and electrochemical characterizations, were conducted to identify the active radicals generated by PMS activation. Singlet oxygen produced from the V_O-based reaction pathway, rather than sulfate radical and hydroxyl radical, was unveiled to play a key role in the BPA degradation process. This work provided new insight into designing transition metal oxide-based Fenton-like catalysts with efficient and sustainable remediation of refractory organic contaminants in wastewater.

氧空位的作用（V _ø在催化剂）则表现为在类芬顿处理阳性。然而，用简单的策略对V _O进行合理的调制以制得高效的Fenton类催化剂仍然是人们所期望和挑战的。在这里，没有任何添加剂的简便热处理方法被证明可以在介孔氧化钴（Co ₃ O ₄）空心纳米球上引入V _O，该空心球可作为高反应性和稳定的类Fenton催化剂，用于降解难降解的有机污染物（双酚A，BPA）通过激活过氧一硫酸盐（PMS）。在V _ø富含共₃ ö ₄纳米球表现出优异的BPA去除效率高BPA降解率（0.0232分钟^-1，100分钟）。事实证明，Co ₃ O _4中的V _O浓度对PMS活化效率起着重要作用。进行了一系列机理研究，包括自由基清除剂，化学探针和电化学表征，以鉴定由PMS活化产生的活性自由基。V _O产生的单重态氧揭示了基于反应的途径，而不是硫酸根和羟基，在BPA降解过程中起关键作用。这项工作为设计基于过渡金属氧化物的Fenton类催化剂提供了新的见识，该催化剂可以高效，可持续地修复废水中的难降解有机污染物。