Efficient degradation of p-nitrophenol by electro-oxidation on Fe doped Ti/TiO2 nanotube/PbO2 anode
Efficient degradation of p-nitrophenol by electro-oxidation on Fe doped Ti/TiO2 nanotube/PbO2 anode
复制标题
Fe 掺杂 Ti/TiO2 纳米管/PbO2 阳极电氧化高效降解对硝基苯酚
DOI：
10.1016/j.seppur.2014.03.015
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发表时间：
2014-05-13
影响因子：
8.6
通讯作者：
Xi, Beidou
中科院分区：
文献类型：
--
作者：
Jiang, Yonghai;Hu, Zhongxin;Xi, Beidou
基于Ti/TiO 2纳米管阵列（TNTs）制备了一种新型的Fe掺杂PbO 2电极，该电极具有高的析氧电位（OEP）和优良的电化学氧化性能，用于对硝基苯酚（p-NP）的降解。通过扫描电镜、线性扫描伏安法和计时电流法等测试手段，研究了Fe掺杂量对电极活性的影响。Fe掺杂改善了PbO_2电极的形貌，提高了电极的OEP，改善了阶跃电流，从而提高了p-NP的降解率。最佳Fe掺杂浓度为0.02 M，在此条件下制备的电极具有最高的OEP（2.7 V）和对NP的降解性能。处理90 min后，在能耗相近的情况下，p-NP降解率达到100%，反应速率常数比未改性的提高约43倍。Fe掺杂Ti/TNTs/PbO 2阳极在处理难降解有机污染物废水方面具有较好的应用前景。(C)© 2014 Elsevier B. V.保留所有权利。
A novel Fe doped PbO2 electrode with a high oxygen evolution potential (OEP) and excellent electrochemical oxidation performance was prepared based on Ti/TiO2 nanotube arrays (TNTs) for p-nitrophenol (p-NP) degradation. Characterized by scanning electron microscope (SEM), linear sweep voltammetry (LSV) and chronoamporometric experiments, the effect of Fe doping amount on the electrode activity was investigated. Fe doping on PbO2 electrode improved the electrode morphology, OEP, step current and thus the degradation of p-NP. The optimal Fe doped concentration was 0.02 M, and the electrode prepared under this condition possessed the highest OEP of 2.7 V and p-NP degradation performance. After 90 min treatment, the p-NP degradation efficiency reached 100% with similar energy consumption, and the reaction rate constant increased about 43 times compared with that of the unmodified one. This Fe doped Ti/TNTs/PbO2 anode has a more promising application potential in treatment of wastewater containing biorefractory organic pollutants. (C) 2014 Elsevier B.V. All rights reserved.