Yu, Tian and Breslin, Carmel B. (2020) Graphene modified composites and electrodes and their potential applications in the Electro-Fenton process. Materials, 13 (2254). ISSN 1996-1944

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Abstract

In recent years, graphene-based materials have been identified as an emerging and promising new material in electro-Fenton, with the potential to form highly efficient metal-free catalysts that can be employed in the removal of contaminants from water, conserving precious water resources. In this review, the recent applications of graphene-based materials in electro-Fenton are described and discussed. Initially, homogenous and heterogenous electro-Fenton methods are briefly introduced, highlighting the importance of the generation of H2O2 from the two-electron reduction of dissolved oxygen and its catalysed decomposition to produce reactive and oxidising hydroxy radicals. Next, the promising applications of graphene-based electrodes in promoting this two-electron oxygen reduction reaction are considered and this is followed by an account of the various graphene-based materials that have been used successfully to give highly efficient graphene-based cathodes in electro-Fenton. In particular, graphene-based composites that have been combined with other carbonaceous materials, doped with nitrogen, formed as highly porous aerogels, three-dimensional materials and porous gas diffusion electrodes, used as supports for iron oxides and functionalised with ferrocene and employed in the more effective heterogeneous electro-Fenton, are all reviewed. It is perfectly clear that graphene-based materials have the potential to degrade and mineralise dyes, pharmaceutical compounds, antibiotics, phenolic compounds and show tremendous potential in electro-Fenton and other advanced oxidation processes.

Item Type:	Article
Additional Information:	© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Cite as: Yu, T.; Breslin, C.B. Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process. Materials 2020, 13, 2254. Funding: This research was funded by the Irish Research Council
Keywords:	electro-Fenton; graphene; oxygen reduction reaction; advanced oxidation; hydrogen peroxide
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	13743
Identification Number:	https://doi.org/10.3390/ma13102254
Depositing User:	Dr. Carmel Breslin
Date Deposited:	07 Dec 2020 16:34
Journal or Publication Title:	Materials
Publisher:	MDPI
Refereed:	Yes
Funders:	Irish Research Council (IRC)
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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