Spatial confinement of Co-N-C catalyst in carbon nanocuboid for water Decontamination: High Performance, mechanism and biotoxicity assessment
Spatial confinement of Co-N-C catalyst in carbon nanocuboid for water Decontamination: High Performance, mechanism and biotoxicity assessment
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用于水净化的碳纳米立方体中 Co-N-C 催化剂的空间限制：高性能、机理和生物毒性评估
DOI：
10.1016/j.cej.2023.147555
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发表时间：
2024-01
影响因子：
15.1
通讯作者：
Qiuyan Li;Jiayi Ruan;Xinyu Zhang;Yanlan Wang;Haiyu Zhao;Yingping Huang;Di Huang;Xiang Liu
中科院分区：
文献类型：
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作者：
Qiuyan Li;Jiayi Ruan;Xinyu Zhang;Yanlan Wang;Haiyu Zhao;Yingping Huang;Di Huang;Xiang Liu
Encapsulating free radical species with super-short lifetime and organic pollutants inside the chemical theoretical diffusion length scale by spatial confinement could offer a strategy with great promise to resolve the mass transfer restrictions in heterogeneous Fenton-like systems. Herein, we reported the spatial confinement of Co, N co-doped carbon (Co-N-C) catalyst in carbon nanocuboids (Co-CNCs),viaencapsulation of Co-N-C catalyst into CNCs, for activating CaSO3to efficiently degrade sulfamethoxazole. The detailed characterizations confirmed ZIF-9 was successfully transformed into N-doped carbon nanocuboids at 850 °C calcination. Co-N-C catalyst was successfully confined into carbon nanocuboids, is beneficial to prevent the aggregation of Co nanoparticles, thereby facilitating its stability and catalyst activity in sulfamethoxazole (SMX) removalviaCaSO3activation. Compared with other sulfites (including Na2SO3and NaHSO3), CaSO3(82%) presented much higher degradation efficiency than those of NaSO3(18%) and NaHSO3(41%) in SMX removal, emphasizing the critical role of CaSO3in water decontamination. Because CaSO3could discharge SO32-persistently and slowly, preventing from the consumption of the formed SO4•-at a high concentration of aqueous SO32-. Quenching test and mechanism study had verified that •OH and SO4•-(SO3•-) were the major reactive species in Co-CNC-850/CaSO3system. In addition, Zebrafish toxicology assays and seed germination experiments had revealed the biotoxicity of SMX to zebrafish and wheat seeds was significantly reduced after degradationviaCo-CNC-850/CaSO3system.
