Cobalt /carbon quantum dots nanoparticles are prepared by a facile synthesis route. The synthesized material is characterized by UV-Vis and PL spectroscopy, FT-IR, cyclic voltammetry, SEM and TEM. These nanomaterials consist of spheres of CoNP surrounded by CQD. This material is studied as a catalyst of the Fenton-like reaction to degrade polypropylene microplastics and compared with nude CoNP. The optimal conditions are obtained, and the mechanism is also studied concluding that the OH is the most important radical involved in the degradation. The core-shell structure is advantageous since the vicinity of the functional groups present in the CQD can form hydrogen bonds with HO, enhancing the charge transfer to Co/Co and/or peroxides formed on the surface making the catalysts more efficient. Besides, the CQD strong reduction effect accelerates the Co/Co cycle.

中文翻译：

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钴/碳量子点核壳纳米颗粒作为类芬顿反应的改进催化剂

钴/碳量子点纳米颗粒是通过简单的合成路线制备的。通过紫外-可见光和PL光谱、FT-IR、循环伏安法、SEM和TEM对合成的材料进行了表征。这些纳米材料由被 CQD 包围的 CoNP 球体组成。研究将该材料作为类芬顿反应的催化剂来降解聚丙烯微塑料，并与裸 CoNP 进行比较。获得了最佳条件，并对机理进行了研究，得出结论：OH 是参与降解的最重要的自由基。核壳结构是有利的，因为CQD中存在的官能团附近可以与H2O形成氢键，增强电荷转移到表面上形成的Co/Co和/或过氧化物，从而使催化剂更有效。此外，CQD的强还原作用加速了Co/Co循环。