Fe⁰-Fe₃O₄ nanoparticles and cerium dioxide hollow spheres as efficient heterogeneous electro-Fenton reagents were rationally designed to be embedded in porous carbon derived from skimmed cotton for the electrocatalytic degradation of ceftriaxone sodium. Skimmed cotton porous carbon material has a hollow tubular structure, and cerium dioxide is dispersed on the surface of the carbon material in a hollow sphere structure of uniform size. Fe⁰-Fe₃O₄ nanoparticles were wrapped in irregular particle shapes on the surface of cerium dioxide hollow spheres, and the remaining part was laid flat on the surface of porous carbon material. The as-synthesized Fe⁰-Fe₃O₄/CeO₂/C showed excellent degradation efficiency of 95.59 % for ceftriaxone sodium within 120 mins and obtained a COD removal rate of 95.21 % at 240 mins. The zero-valent iron as a reducing agent effectively accelerated the Fe³⁺/Fe²⁺ cycle, allowing the composites to exhibit higher catalytic activity and further reducing the possibility of secondary contamination. Moreover, the existence of cerium dioxide further promoted the redox cycle of Ce⁴⁺/Ce³⁺ and accelerated the electron transfer in the interface of the catalyst. The synergistic effect of iron and cerium greatly facilitated the production of hydroxyl radicals and increased the yield of hydroxyl radicals in the reaction system.

Fe ⁰ -Fe ₃ O ₄纳米颗粒和二氧化铈空心球作为高效的非均相电芬顿试剂被合理设计嵌入脱脂棉衍生的多孔碳中，用于头孢曲松钠的电催化降解。脱脂棉多孔碳材料具有中空管状结构，二氧化铈以大小均匀的中空球状结构分散在碳材料表面。Fe ⁰ -Fe ₃ O ₄纳米颗粒以不规则颗粒状包裹在二氧化铈空心球表面，其余部分平铺在多孔碳材料表面。合成后的 Fe ⁰ -Fe₃ O ₄ /CeO ₂ /C在120分钟内对头孢曲松钠的降解效率达到95.59%，在240分钟内COD去除率达到95.21%。零价铁作为还原剂有效加速了Fe ³⁺ /Fe ²⁺循环，使复合材料表现出更高的催化活性，进一步降低了二次污染的可能性。此外，二氧化铈的存在进一步促进了Ce ⁴⁺ /Ce ^{3+的氧化还原循环。}并加速了催化剂界面的电子转移。铁和铈的协同作用极大地促进了羟基自由基的产生，提高了反应体系中羟基自由基的产率。