Yang Xue, Yao Xiao, Qiu Yinyuan
School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China.
Fujian Special Equipment Inspection and Research Institute, Fuzhou 350008, China.
Molecules. 2024 Aug 12;29(16):3825. doi: 10.3390/molecules29163825.
CoMnO (CMO) has been recognized as an effective peroxymonosulfate (PMS) activator; however, it still shows disadvantages such as limited reactive sites and metal leakage. Herein, an effective and environmentally friendly composite catalyst, CMO/Kln, was synthesized by anchoring CMO on kaolinite (Kln), a natural clay mineral with a special lamellar structure, to activate peroxymonosulfate (PMS) for the degradation of residue pharmaceuticals in water. The abundant hydroxyl groups located on the surface of Kln helped induce rich oxygen vacancies (OVs) into composite CMO/Kln, which not only acted as additional active sites but also accelerated working efficiency. In addition, compared with bare CMO, CMO/Kln showed lower crystallinity, and the adoption of the Kln substrate contributed to its structural stability with lower metal leaching after three rounds of reaction. The universal applicability of CMO/Kln was also verified by using three other pharmaceuticals as probes. This work shed light on the adoption of natural clay minerals in modifying CMO catalysts with promoted catalytic activity for the efficient and eco-friendly remediation of pharmaceuticals in wastewater.
CoMnO（CMO）已被公认为是一种有效的过一硫酸盐（PMS）活化剂；然而，它仍然存在诸如反应位点有限和金属泄漏等缺点。在此，通过将CMO锚定在具有特殊层状结构的天然粘土矿物高岭土（Kln）上，合成了一种高效且环境友好的复合催化剂CMO/Kln，用于活化过一硫酸盐（PMS）以降解水中的残留药物。Kln表面丰富的羟基有助于在复合催化剂CMO/Kln中诱导产生大量氧空位（OVs），这些氧空位不仅作为额外的活性位点，还提高了催化效率。此外，与纯CMO相比，CMO/Kln的结晶度较低，采用Kln载体有助于其结构稳定性，经过三轮反应后金属浸出率较低。通过使用其他三种药物作为探针，也验证了CMO/Kln的普遍适用性。这项工作为采用天然粘土矿物改性CMO催化剂以促进其催化活性，实现废水中药物的高效和环保修复提供了思路。
