Developing efficient and robust materials for emerging electrodegradation of organic pollutants has attracted broad interests. In this study, a novel controlled pyrolysis approach was employed to fabricate a quasi-MOF derivative-based electrode by pyrolyzing MIL-101(Fe) anchored on a polyaniline-modified carbon fiber paper at 400 °C. The construction of the accessible Fe-O sites, and the in situ generation of Fe₃O₄ nanoparticles with graphene-like carbon layers coated, would enhance the electro-Fenton activity of the electrode, which was used as the cathode. The results showed that 100% of 50 mg L^-1 p-nitrophenol and 52% total organic carbon were removed in 120 min under a current density of 5 mA cm^-2, suggesting that the prepared electrode had a more efficient mineralization current efficiency and less energy consumption compared with electrodes before pyrolysis. Notably, the stability of the electrode was greatly improved, maintaining its outstanding performance even after ten runs. The plausible reaction mechanism and degradation pathway were also proposed. This new pyrolysis strategy is expected to serve as a paradigm for designing efficient electrode in electro-Fenton remediation field.

开发用于新兴的有机污染物电沉积的高效而坚固的材料引起了广泛的兴趣。在这项研究中，一种新颖的可控热解方法通过在400°C下热解锚定在聚苯胺改性的碳纤维纸上的MIL-101（Fe）来制造基于准MOF衍生物的电极。易接近的Fe-O位点的构建以及原位生成的石墨烯状碳层覆盖的Fe ₃ O ₄纳米粒子的产生，将增强用作阴极的电极的电子芬顿活性。结果表明，在5 mA cm ^-2的电流密度下，在120分钟内去除了100％的50 mg L ^-1对硝基苯酚和52％的总有机碳。，表明所制备的电极与热解前的电极相比具有更高的矿化电流效率和更少的能量消耗。值得注意的是，电极的稳定性大大提高，即使经过十次运行仍能保持其出色的性能。还提出了合理的反应机理和降解途径。有望将这种新的热解策略用作设计电子芬顿修复领域中高效电极的范例。