Journal
ELECTROCHIMICA ACTA
Volume 176, Issue -, Pages 811-818Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.07.029
Keywords
Carbon-coated nickel foam; Electro-Fenton; Nickel leaching; DMP degradation; TOC removal
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Funding
- Sino-Greek Science and Technology Cooperation Project [2013DFG62590]
- National Natural Science Foundation of China [21276290]
- Guangdong Province Nature Science Foundation [2014A030313150]
- project of Pearl River Science and Technology New Star of Guangzhou [2011Z220061]
- Ministry of Education and Science of the Russian Federation [14.Z50.31.0001]
- Bilateral R&D Co-operation between Greece-China
- European Union
- Greek Ministry of Education-GSRT
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Carbon-coated nickel foam (C@NF) electrodes are prepared via a simple and effective method, hydrothermal-carbonization cycle coating process, characterized by scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) and employed as the electro-Fenton (E-Fenton) cathode for degrading dimethyl phthalate (DMP) in aqueous solution. For the sake of comparison, nickel foam (NF) electrode and the conventional E-Fenton cathode (graphite gas diffusion electrode (GDE)) are also tested and compared. Experimental results indicate that nickel leaching can be effectively controlled at C@NF4 cathode (4 times cycle coating process), having great significance for promoting the application of NF in E-Fenton system. Moreover, C@NF4 cathode still presents excellent and effective performance on DMP degradation. DMP can be completely degraded within 2 h at -0.5 V and the total organic carbon (TOC) removal reaches as high as 82.1 %, which is almost 3 times as high as that at graphite GDE. Futhermore, the current efficiency for H2O2 generation at C@NF4 is enhanced by 12 times compared to that at NF, and consequently the energy consumption during DMP degradation at C@NF4 is obvious lower than that at both NF cathode and graphite GDE. From the obtained results it can be deduced that C@NF4 is promising to be an attractive alternative E-Fenton cathode for removing organic pollutants in wastewater. (C) 2015 Elsevier Ltd. All rights reserved.
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