Synthesis, characterization and application of self-catalyzed layered double hydroxide coated carbon-felt cathode in electro-Fenton’s degradation of organic pollutants - Université de Montpellier Accéder directement au contenu
Poster De Conférence Année : 2016

Synthesis, characterization and application of self-catalyzed layered double hydroxide coated carbon-felt cathode in electro-Fenton’s degradation of organic pollutants

Résumé

Electro-Fenton’s process is a well-known electrochemical advanced oxidation processes (EAOPs) for degradation and mineralization of refractory pollutants. The nature of cathode material used in this process is essential parameters that determine the efficiency of the process because the cathode controls the generation and regeneration of Fenton’s reagents (i.e. H2O2 and Fe2+)1. In this study we prepared for the first time, a layered double hydroxide (LDH) coated carbon-felt that acts as a suitable cathode in terms of Fenton’s reagents production for electro-Fenton degradation of organic pollutants. Cobalt-iron (Co-Fe) LDH was deposited on a raw carbon-felt via in-situ solvo-thermal process at different treatment temperature (70 – 120 oC) and concentrations of Co2+/Fe3+. The X-ray diffraction pattern of both powder LDH and coated carbon-felt showed a well crystalline structure with 00l characteristic peaks of LDH and huge peak associated with carbon (Fig. 1a). The as-prepared cathode showed superior mineralization efficiency (93% TOC removal) when compared to raw carbon-felt cathode (66%) with addition of 0.2 mM Fe2+ for treatment of acid orange II in Electro-Fenton process (Fig b). The better mineralization obtained with as-prepared cathode is attributed to two phenomena: (i) co-catalyst effect of the Co released from the LDH (ii) controlled/gradual release of both catalyst that eliminate waste reactions. The prepared cathode is a suitable and promising cathode material for application in electro-Fenton process for wastewater treatment.

Domaines

Chimie
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Dates et versions

hal-01700058 , version 1 (03-02-2018)

Identifiants

  • HAL Id : hal-01700058 , version 1

Citer

Soliu O. Ganiyu, Thi Xuan Huong Le, Mikhael Bechelany, Eric D. van Hullebusch, Mehmet A. Oturan, et al.. Synthesis, characterization and application of self-catalyzed layered double hydroxide coated carbon-felt cathode in electro-Fenton’s degradation of organic pollutants. 67th Annual Meeting of the International Society of Electrochemistry, Aug 2016, La Haye, Netherlands. , 2016. ⟨hal-01700058⟩
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