As sulfate-radical (SR)-based advanced oxidation processes are increasingly implemented, Oxone has been frequently-used for generation of SR. While Co₃O₄ nanoparticle (NP) has been widely-accepted as a promising catalyst for activating Oxone, Co₃O₄ NPs tend to aggregate in water, losing their reactivity. Thus, many attempts have immobilized Co₃O₄ NPs on supports, especially carbonaceous substrates, because combination of Co NPs with carbon substrates offers synergistic effects for boosting catalytic activities. Moreover, carbon substrates doped with hetero-atoms (N and S) further increase electron transfer and reactivity. Therefore, it is even promising to immobilize Co NPs onto N/S-doped carbon (NSC) to form Co-embedded NSC (denoted as CoNSC) for enhancing Oxone activation. In this study, a convenient and facile technique is proposed to prepare such a CoNSC via a simple carbonization treatment of a coordination polymer of Co and trithiocyanuric acid (TTCA). The resulting CoNSC exhibits the sheet-like hexagonal morphology with the core–shell configuration, and Co NPs are well-embedded into the N/S-doped carbonaceous matrix, making it an advantageous heterogeneous catalyst for Oxone activation. As Azorubine S (ARS) decolorization is employed as a model reaction of Oxone activation, CoNSC exhibits a higher catalytic activity than pristine Co₃O₄ and NSC for Oxone activation to decolorize ARS. In comparison to the other reported catalysts, CoNSC also possesses a much lower E_a for ARS decolorization. CoNSC can be also reusable and stable for Oxone activation over multiple cycles without loss of catalytic activity. These features validate that CoNSC is a promising and useful Co-based catalyst for Oxone activation.

随着基于硫酸根基（SR）的高级氧化工艺的实施越来越多，Oxone已被广泛用于生成SR。尽管Co ₃ O ₄纳米颗粒（NP）作为活化Oxone的有希望的催化剂已被广泛接受，但Co ₃ O ₄ NP倾向于在水中聚集，从而失去其反应活性。因此，许多尝试已经使Co ₃ O ₄固定化。载体（尤其是碳质底物）上的NP，因为Co NP与碳底物的组合具有协同效应，可增强催化活性。而且，掺杂有杂原子（N和S）的碳基质进一步提高了电子转移和反应性。因此，甚至有望将Co NPs固定在N / S掺杂的碳（NSC）上以形成共嵌入的NSC（称为CoNSC）以增强Oxone的活化作用。在这项研究中，提出了一种简便易行的技术，通过对Co和三硫氰尿酸（TTCA）的配位聚合物进行简单的碳化处理来制备这种CoNSC。所得的CoNSC表现出具有核壳结构的片状六角形形态，并且Co NPs很好地嵌入了N / S掺杂的碳质基质中，使其成为氧酮活化的有利的非均相催化剂。由于偶氮红S（ARS）的脱色被用作Oxone活化的模型反应，因此CoNSC的催化活性高于原始Co₃ O ₄和NSC用于Oxone活化以使ARS脱色。与其他报道的催化剂相比，CoNSC对于ARS脱色也具有较低的E _a。CoNSC还可以在多个周期内重复使用并稳定用于Oxone活化，而不会损失催化活性。这些特征证明，CoNSC是一种有希望且有用的基于钴的Oxone活化催化剂。