Co₃O₄@Fe₃O₄/cellulose membrane was synthesized by coating rod-like MOF-derived Fe₃O₄ with Co₃O₄ nanoparticles and blending with cellulose solution, further applied in the visible light-driven photo-Fenton system for perfluorooctanoic acid (PFOA) degradation. In the H₂O₂/membrane/visible light system, the Electron paramagnetic resonance (EPR) analysis and scavenger experiment results suggested that PFOA degradation was a co-dependent mechanism via photogenerated electrons, photogenerated holes (h⁺) and various radical species, rather than a single active constituent. Co₃O₄@Fe₃O₄/cellulose membrane showed outstanding degradation performance, stability and recyclability under optimal conditions. Compared with pure Fe₃O₄ or Co₃O₄ nanoparticles, the Co₃O₄@Fe₃O₄/cellulose membrane can degrade around 94.5% PFOA within 180 min in reaction system, and the leached Fe and Co was only 0.05 and 0.49 ppm, respectively. Moreover, Co₃O₄@Fe₃O₄/cellulose was reused by rinsing with ultra-pure water and the degradation capacity was still 80.4% after five cycles. The degradation pathway of PFOA also was proposed based on UHPLC-MS analysis.

Co ₃ O ₄ @Fe ₃ O ₄ /纤维素膜是通过在棒状MOF衍生的Fe ₃ O ₄上包覆Co ₃ O ₄纳米粒子并与纤维素溶液共混合成的，进一步应用于可见光驱动的光Fenton系统用于全氟辛酸 (PFOA) 降解。在H ₂ O ₂ /膜/可见光体系中，电子顺磁共振（EPR）分析和清除剂实验结果表明，PFOA降解是通过光生电子、光生空穴（h ⁺) 和各种自由基物种，而不是单一的活性成分。Co ₃ O ₄ @Fe ₃ O ₄ /纤维素膜在最佳条件下表现出优异的降解性能、稳定性和可回收性。与纯Fe ₃ O ₄或Co ₃ O ₄纳米粒子相比，Co ₃ O ₄ @Fe ₃ O ₄ /纤维素膜在反应体系中180 min内可降解94.5%左右的PFOA，浸出的Fe和Co仅为0.05，分别为 0.49 ppm。此外，Co ₃ O ₄ @Fe ₃ O ₄/纤维素经超纯水漂洗重复使用，5次循环后降解能力仍为80.4%。基于 UHPLC-MS 分析，还提出了 PFOA 的降解途径。