The reduced graphene oxide (rGO)-Fe₃O₄ nanocomposites were proposed to promote Fenton reaction for ofloxacin (OFX) degradation in discharge plasma system. The morphology, structure and optical absorption properties of the prepared rGO-Fe₃O₄ were characterized by SEM, TEM, XPS and UV-VIS spectrophotometer. The effect of various parameters on degradation efficiency of OFX was investigated. Besides, the effect of catalyst on the amount of ·OH in the discharge plasma system was analyzed. Finally, the degradation process of OFX was analyzed. The results showed that Fe₃O₄ can be successfully loaded on graphene, and has strong optical absorption properties. Compared with Fe₃O₄ alone, rGO-Fe₃O₄ further improved the degradation efficiency and kinetic constant of OFX in discharge plasma system. The highest degradation efficiency and kinetic constant reached 99.9% and 0.108 min⁻¹ respectively after 60 min treatment. Increasing applied voltage and decreasing the initial solution concentration were beneficial to OFX degradation. The rGO-Fe₃O₄ enhanced ·OH formation in discharge plasma system. With the discharge going on, pH value of solution declined while the conductivity of solution increased. Compared with deionized water solution, the decrease of pH and the increase of conductivity in OFX solution were more obvious. The conjugated heterocyclic structure was destroyed gradually in the degradation process.

提出了还原型氧化石墨烯（rGO）-Fe ₃ O ₄纳米复合物，以促进芬特沙星反应在放电等离子体系统中降解氧氟沙星（OFX）。用SEM，TEM，XPS和UV-VIS分光光度计对制备的rGO-Fe ₃ O ₄的形貌，结构和吸光性能进行了表征。研究了各种参数对OFX降解效率的影响。此外，分析了催化剂对放电等离子体系统中·OH含量的影响。最后，分析了OFX的降解过程。结果表明，Fe ₃ O ₄可以成功地负载在石墨烯上，具有很强的光吸收性能。与Fe ₃相比仅O ₄，rGO-Fe ₃ O ₄进一步提高了放电等离子体系统中OFX的降解效率和动力学常数。处理60分钟后，最高降解效率和动力学常数分别达到99.9％和0.108 min ^-1。增加施加电压和降低初始溶液浓度有利于OFX降解。rGO-Fe ₃ O ₄在放电等离子体系统中增强了·OH的形成。随着放电的进行，溶液的pH值下降，溶液的电导率增加。与去离子水溶液相比，OFX溶液的pH值下降和电导率上升更为明显。共轭杂环结构在降解过程中逐渐被破坏。