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Chemically modified graphite felt as an efficient cathode in electro-fenton for p-nitrophenol degradation

Zhou, Lei and Zhou, Minghua and Hu, Zhongxin and Bi, Zhaoheng and Groenen Serrano, Karine Chemically modified graphite felt as an efficient cathode in electro-fenton for p-nitrophenol degradation. (2014) Electrochimica Acta, 140. 376-383. ISSN 0013-4686

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Official URL: https://doi.org/10.1016/j.electacta.2014.04.090

Abstract

A simple method with low-cost chemical reagents ethanol and hydrazine hydrate was used to modify graphite felt as the cathode for electro-fenton (EF) application, using p-nitrophenol (p-Np) as the model pollutant. Characterized by scanning electron microscope, contact angle, Raman spectrum and X-ray photoelectron spectroscopy, the morphology and surface physicochemical properties after modification were observed considerably changed. After modification, some nanoparticles and oxygen and nitrogen-containing functional groups appeared on the cathode surface, which greatly improved the surface hydrophilic property and the electrocatalytic activity for oxygen reduction reaction. The effects led to the hydrogen peroxide accumulation on the modified cathode markedly increased to 175.8 mg L−1, while that on the unmodified one was only 67.5 mg L−1. p-Np of initial 50 mg L−1 could be completely removed by EF using the modified cathode, and the mineralization ratio reached 51.4%, more than 2 times of the pristine one. After 10 cycles, the mineralization ratio of the modified cathode was still above 45%, suggesting that the modification method can provide an effective approach to improve EF performance, and thus benefits to promote its environmental applications.

Item Type:Article
HAL Id:hal-02134782
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Nankai University - NKU (CHINA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:24 Sep 2018 08:07

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