摘要：

通过水热法制备了磁性复合材料Fe₃O₄-MnO₂/Gh，并通过XRD、SEM、VSM和XPS等技术对其进行了表征分析。将Fe₃O₄-MnO₂/Gh作为非均相电-Fenton催化剂应用于电催化体系，考察了非均相电-Fenton体系对氯乙酸的降解效果。结果表明，在Fe₃O₄和MnO₂的协同作用下，Fe₃O₄-MnO₂/Gh非均相电-Fenton体系实现了对氯乙酸的高效降解。在催化剂投加量为0.8 g/L、电流密度为8 mA/cm²，pH为5，反应时间为45 min，O₂流量为200 mL/min时，其TOC去除率可达80.68%，有机氯的转化率为98%，且该催化剂具有较高的稳定性。

关键词: 石墨烯, 非均相电-Fenton, 氯乙酸

Abstract:

The magnetic composite Fe₃O₄-MnO₂/Gh was prepared by hydrothermal method and characterized by XRD, SEM, VSM and XPS. Fe₃O₄-MnO₂/Gh as heterogeneous electro-Fenton catalyst was applied in the electrocatalytic system, and its degradation on chloroacetic acid was investigated. The results showed that the efficient degradation of chloroacetic acid was achieved in the Fe₃O₄-MnO₂/Gh heterogeneous electro-Fenton system under the synergistic action of Fe₃O₄ and MnO₂. The TOC removal efficiency of chloroacetic acid was up to 80.68% and organic chlorine conversion reach 98% at the catalyst dosage 0.8 g/L, current density 8 mA/cm², pH 5, reaction time 45 min, O₂ flow rate 200 mL/min, and the catalyst has high stability.

Key words: graphene, heterogeneous electro-Fenton, chloroacetic acid

中图分类号: 

• X703.1