Abstract: In this study，a nanoscale iron/carbon nanotube (CNT) composite cathode was synthesized and evaluated by X-ray diffraction (XRD)，scanning electron microscopy (SEM)，and engery dispersive X-ray spectroscopy (EDX) respectively. It was found that 92.1% degradation of 5 mg/L Rhodamin B (RhB) was achieved in the presence of 1.2V potential and air (0.1m3/h) based on the eletro-Fenton reaction using a nanoscale Fe/CNTs composite cathode at a neutral pH. The results indicated that both H2O2 and iron ions could be effectively generated by electrochemical reduction from Fe/CNTs cathode and RhB could be rapidly eliminated.

摘要： 制备了纳米铁/碳纳米管(Fe/CNTs)复合氧阴电极，通过SEM、EDS、XRD对电极进行了表征。基于该氧阴电极中性条件下电-Fenton降解Rhodamin B (RhB) 溶液的试验表明，外加电压1.2 V、通入空气量0.1 m3/h、反应120 min、5mg/L的RhB溶液降解率达到92.1%，说明H2O2和离子态铁可以通过电化学还原在该氧阴极表面高效产生，RhB可通过E-Fenton反应高效去除。