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泡沫镍和泡沫铜阴极电类Fenton氧化降解对硝基酚的比较

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Indexed by:期刊论文

Date of Publication:2017-04-07

Journal:化工进展

Included Journals:EI、CSCD

Volume:36

Issue:7

Page Number:2653-2659

ISSN No.:1000-6613

Key Words:泡沫金属;电类Fenton;降解;动力学;稳定性

Abstract:选用两种常见的泡沫金属材料——泡沫镍(NF)和泡沫铜(CF)作为电类Fenton氧化体系的阴极,分别从电极的形貌、结构、电类Fenton氧化降解对硝基酚(p-NP)和稳定性能等方面进行了比较分析.结果表明,NF和CF均为三维多孔网络结构,CF电极表面有少量铜氧化物颗粒沉积;NF和CF阴极均能催化O2原位两电子还原产H2O2,当阴极电位为-0.9V,180min时H2O2的累积质量浓度达最大值,分别为64.2mg/L和56.5mg/L,电流效率分别为14.1%和14.3%;NF和CF阴极可拓宽电类Fenton氧化法的pH适用范围,在不调节电解液初始pH条件下p-NP均有较好的降解效果,当阴极电位为一0.9V,180min时p-NP去除率分别为72.9%和80.7%,反应过程均符合一级动力学模型,CF电极体系p-NP的降解速率高于其在NF电极体系中的降解速率;NF电极相对CF电极的稳定性较好,重复使用8次后,p-NP去除率和电极形貌均没有明显变化,但仍有少量的镍离子溶出.

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