Synergistic degradation of antimicrobial agent ciprofloxacin in water by using 3D CeO^sub 2^/RGO composite as cathode in electro-Fenton system

There is a growing body of antibiotics which are accumulated after usage by humans and animals for health reasons in the environment. Here, a 3D CeO2/RGO composite was obtained by using hydrothermal self-assembly synthesis method and in-situ deposition method. 3D CeO2/RGO composite was used firstly...

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Published inJournal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 784; p. 6
Main Authors Li, Yi, Han, Jingjing, Xie, Baorong, Li, Yanan, Zhan, Sihui, Tian, Yang
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Science Ltd 01.01.2017
Subjects
Antibiotics
Antiinfectives and antibacterials
Biomass
Cathodes
Cerium oxides
Degradation
Hydrogen peroxide
Hydrothermal reactions
Hydroxyl radicals
Microbiology
Nanocomposites
Oxidation
Reaction time
Self-assembly
Sodium sulfate
Three dimensional composites
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Summary:There is a growing body of antibiotics which are accumulated after usage by humans and animals for health reasons in the environment. Here, a 3D CeO2/RGO composite was obtained by using hydrothermal self-assembly synthesis method and in-situ deposition method. 3D CeO2/RGO composite was used firstly as cathode for efficient degradation of antimicrobial agent ciprofloxacin (CIP) in electro-Fenton system. The obtained composite was characterized by XRD, SEM, BET, TEM, HPLC-MS, CV and EIS. Synergistic effects from the electrosorption property of CIP on 3D CeO2/RGO and the electrocatalytic activity of CeO2 and the strong oxidizing property of hydroxyl radical (·OH) from electro-generated H2O2 in situ promote to reach about 100% efficient degradation of CIP. With the hydrothermal reaction time of 8 h and a current of 400 mA, about 100% antibiotics can be cleaned, and 91% TOC can be removed after 6.5 h at the experiment condition of pH = 3 and 0.1 mmol·L−1 Fe2+ in 0.05 mol·L−1 Na2SO4 solution. 3D CeO2/RGO composite can be used effectively as cathode in the electro-Fenton treatment for the deep degradation of CIP.
ISSN:1572-6657
1873-2569