Development of a three-dimensional electro-Fenton system packed with C-PTFE/Fe–Co–C hybrid particle electrodes for simultaneous H2O2 generation and activation into •OH

Zhao, Zekun; Hao, Yongjie; Wu, Jingli; Feng, Zhihai; Fu, Feng; Li, Yifan; Yang, Qin; Jiang, Bo

doi:10.1016/j.seppur.2023.123960

Cited by 14 publications

(1 citation statement)

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“…The use of polytetrafluoroethylene (PTFE) emulsions as a binder in the preparation of electrodes based on carbon materials is very common [31,32]; however, it is possible that PTFE generates jams and blockages in pores, affecting the electrocatalytic yield. In this work, metal-free electrocatalysts based on carbon xerogel/graphene oxide (OG) were synthesized and used as ORR electrocatalysts in the degradation of amoxicillin (AMX) using an electro-Fenton process, which also involved the synthesis and use of a homemade carbon/magnetite catalyst as a heterogeneous Fenton catalyst.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin

Valencia-Valero,

Fajardo-Puerto,

Elmouwahidi

et al. 2024

Gels

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The electro-Fenton process is based on the generation of hydroxyl radicals (OH•) from hydroxide peroxide (H2O2) generated in situ by an oxygen reduction reaction (ORR). Catalysts based on carbon gels have aroused the interest of researchers as ORR catalysts due to their textural, chemical and even electrical properties. In this work, we synthesized metal-free electrocatalysts based on carbon gels doped with graphene oxide, which were conformed to a working electrode. The catalysts were prepared from organic-gel-based inks using painted (brush) and screen-printed methods free of binders. These new methods of electrode preparation were compared with the conventional pasted method on graphite supports using a binder. All these materials were tested for the electro-Fenton degradation of amoxicillin using a homemade magnetite coated with carbon (Fe3O4/C) as a Fenton catalyst. All catalysts showed very good behavior, but the one prepared by ink painting (brush) was the best one. The degradation of amoxicillin was close to 90% under optimal conditions ([Fe3O4/C] = 100 mg L−1, −0.55 V) with the catalyst prepared using the painted method with a brush, which had 14.59 mA cm−2 as JK and a H2O2 electrogeneration close to 100% at the optimal voltage. These results show that carbon-gel-based electrocatalysts are not only very good at this type of application but can be adhered to graphite free of binders, thus enhancing all their catalytic properties.

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Section: Introductionmentioning

confidence: 99%