In this study, an electro-Fenton gas diffusion electrode featuring air self-respiration was fabricated by incorporating carbon nanotubes, carbon nitride, and polytetrafluoroethylene onto graphite felt. The fabrication process involved a synergistic approach of ultrasonic impregnation and vacuum filtration, establishing a gas–liquid-solid tri-phase interface both on the surface and within the electrode. This preparation method facilitates autonomous air intake, diffusing it to the tri-phase reaction interface, thereby eliminating the necessity for aeration and reducing operational costs. The optimal electrode preparation conditions were determined through Box-Behnken Design response surface experiments, leading to the enhancement of HO production conditions. Under the optimized conditions, HO accumulation reached 45.83 mg L cmh, surpassing the performance achieved with conventional ultrasonic impregnation and vacuum filtration methods. Furthermore, the performance of self-breathing and the impact factors are explored. Finally, the electrode’s efficacy was demonstrated through the degradation of phenol and bisphenol A with concentrations of 100 mg L exhibiting degradation rates of 92 % and 95 %, respectively, within 60 min.

中文翻译：

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利用超声波浸渍和真空过滤制造的自呼吸气体扩散电极提高 H2O2 的产量

在这项研究中，通过将碳纳米管、氮化碳和聚四氟乙烯掺入石墨毡上，制备了具有空气自呼吸功能的电芬顿气体扩散电极。制造过程涉及超声波浸渍和真空过滤的协同方法，在电极表面和内部建立气-液-固三相界面。这种制备方法有利于自主进气，将其扩散到三相反应界面，从而消除了曝气的必要性并降低了操作成本。通过 Box-Behnken Design 响应面实验确定了最佳电极制备条件，从而改善了 H2O 生产条件。在优化条件下，H2O累积量达到45.83 mg L cmh，超过了传统超声波浸渍和真空过滤方法所达到的性能。此外，还探讨了自主呼吸的性能及其影响因素。最后，通过在 60 分钟内降解浓度为 100 mg·L 的苯酚和双酚 A 来证明电极的功效，降解率分别为 92% 和 95%。