碳纳米管修饰泡沫镍空气扩散电极电-Fenton法降解水中对硝基酚

Degradation of p-nitrophenol in water by electro-Fenton process with carbon nanotube modified nickel foam air diffusion electrode

采用涂覆焙烧法制备碳纳米管修饰泡沫镍空气扩散电极，并用环境扫描电子显微镜和循环伏安法对其表面形貌和氧化还原特性进行了表征。考察了该电极还原O2产生H2O2的性能及对水中对硝基酚的降解性能。表征结果表明：碳纳米管修饰泡沫镍空气扩散电极具有多级孔道结构；在-0．6V处具有较强的氧双电子还原峰。实验结果表明：当电流为150mA、反应时间为120min时，产生的H2O2的质量浓度为321．38mg／L；在外加0．1mmol／LFeSO4形成的电-Fenton体系中，反应30min后对硝基酚去除率可达95舯％；且该电极重复使用10次的对硝基酚去除率为92％-96％。

The nickel foam air diffusion electrode modified with carbon nanotube was prepared by deposition and calcinations process, and its surface appearance and redox properties were characterized by environmental scanning electron microscope （ESEM） and cyclic voltammetry （CV）. The capabilities of the electrode on 1-1202 generation and p-nitmphenol （p-NP） degradation were investigated. The characterization results indicate that： The modified electrode presents a hierarchical pore slmcture; A strong double electronic oxygen reduction peak appears at -0.6 V. The experimental results show that： When the current intensity is 150 mA and the reaction time is 120 rain, the mass concentration of H202is 321.38 mg/L; In the electro-Fenton system with 0.1 mmol/L FeSO4, the p-NP removal rate can reach 95.90% after 30min; Within 10flmesofreuse, thep-NP removal rate on the electrode is 92%-96%.