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- W4327748711 abstract "To overcome the obstacles of adding oxidants for the decontamination of antibiotics in natural aqueous environment, an external oxidant-free system was developed to in-situ generate reactive oxygen species (ROS) through the activation of dissolved oxygen molecules (O2). Guided by density functional theory (DFT) calculation, cobalt-doped Fe3S4 (Co-Fe3S4) nanoflowers were designed and synthesized, which exhibited superior O2 adsorption and activation ability. Co-Fe3S4 triggered a long-lasting generation of •OH with a high yield of 16.63 μM •OH, which was 3 times higher than that of Fe3S4. Furthermore, use of Co-Fe3S4 resulted in a 7.33-fold improvement in sulfamethoxazole’s degradation rate and boosted the degradation efficiency from 43% to over 90% in the long-run experiments compared to Fe3S4. With 18O2 isotopic investigations, we quantitatively revealed that •OH was generated via O2′s one-step dissociative adsorption process and the directional electron transfer contributed by structural S(-II). Without the addition of external oxidants (e.g., H2O2, O3), we have reported an efficient one-step activation of O2 to generate ROS for effective degradation of antibiotics. Hence, we have provided a new strategy for the control of emerging organics in natural water systems, as well as shed light on the mechanisms of in-situ •OH generation." @default.
- W4327748711 created "2023-03-18" @default.
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- W4327748711 date "2023-05-01" @default.
- W4327748711 modified "2023-10-17" @default.
- W4327748711 title "External oxidant-free remediation of antibiotics: Activation of oxygen molecules to generate hydroxyl radicals using Co-Fe3S4 nanoflowers" @default.
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- W4327748711 doi "https://doi.org/10.1016/j.cej.2023.142465" @default.
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