Synergistic degradation of antimicrobial agent ciprofloxacin in water by using 3D CeO2/RGO composite as cathode in electro-Fenton system

Li, Yang; Han, Jingjing; Xie, Baorong; Li, Yanan; Zhan, Sihui; Tian, Yang

doi:10.1016/j.jelechem.2016.11.057

Cited by 38 publications

(9 citation statements)

References 61 publications

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“…Radical quenching experiments were conducted to identify the active species generated during electrochemical activation of O 2 ,u sing Tert-butanol (TBA) and superoxide dismutase (SOD) to scavenge COH and CO 2 À ,respectively.As exhibited in Figures 2d and S7, the addition of TBAl ed to asignificant decrease of k obs from 1.44 AE 0.04 min À1 to 0.05 AE 0.02 min À1 ,d emonstrating that CIP was eliminated through the surface catalytic oxidation by COH. Additionally,the CIP degradation efficiencyd ecreased significantly with k obs of 0.07 AE 0.02 min À1 in the presence of SOD,e ven no BMPO-CO 2 À signal was detected during EPR analysis.T hese results manifested that O 2 was firstly reduced to CO 2 À intermediate via 1-electron pathway,which followed by subsequent reduc- [11] Ce 0.75 Zr 0.25 O 2 /RGO, [12] MnCo 2 O 4 -CF, [13] Fr-ErGO, [14] Ni-CF [15] )for the CIP removal in electrocatalytic degradation processes.…”

Section: Resultsmentioning

confidence: 98%

“…with CeO 2 /RGO, [11] Ce 0.75 Zr 0.25 O 2 /RGO, [12] MnCo 2 O 4 -CF, [13] Fc-ErGO [14] and Ni-CF [15] as cathodes, respectively.M oreover, k obs in homogeneous EF system (C/ Fe 2+ )w ith carbon aerogel as cathode and Fe 2+ as Fenton catalyst were 0.11 AE 0.01 min À1 under the same conditions. Remarkably,F e 0.5 Co 0.5 Cc athode had the k obs of 1.44 AE 0.04 min À1 to be 7-144 times higher than other catalysts.…”

Section: Angewandte Chemiementioning

confidence: 99%

“…d) Comparison of the reaction rate under different quenching conditions. e) Comparison of k obs and J among various electrodes (Fe 0.5 Co 0.5 C, C/Fe 2+ ,C eO 2 /RGO,[11] Ce 0.75 Zr 0.25 O 2 /RGO,[12] MnCo 2 O 4 -CF,[13] Fr-ErGO,[14] Ni-CF[15] )for the CIP removal in electrocatalytic degradation processes.…”

mentioning

confidence: 99%

“…)],t hen *O 2 is reduced and protonated to COOH as the intermediate [Eq. (10)],a nd H 2 O 2 is subsequently generated and chemically bound with *toform *H 2 O 2 [Eq (11)…”

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confidence: 99%

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Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

et al. 2021

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We reported the selective electrochemical reduction of oxygen (O 2 )t oh ydroxylr adicals (COH) via 3-electron pathway with FeCo alloye ncapsulated by carbon aerogel (FeCoC). The graphite shell with exposed -COOH is conducive to the 2-electron reduction pathway for H 2 O 2 generation stepped by 1-electron reduction towardst oCOH. The electrocatalytic activity can be regulated by tuning the local electronic environment of carbon shell with the electrons coming from the inner FeCo alloy. The new strategy of COH generation from electrocatalytic reduction O 2 overcomes the rate-limiting step over electron transfer initiated by reduction-/oxidation-state cycle in Fenton process.F ast and complete removal of ciprofloxacin was achieved within 5min in this proposed system, the apparent rate constant (k obs )w as up to 1.44 AE 0.04 min À1 ,w hich is comparable with the state-of-the-art advanced oxidation processes.T he degradation rate almost remains the same after 50 successive runs,s uggesting the satisfactory stability for practical applications.

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Section: Resultsmentioning

confidence: 98%

Section: Angewandte Chemiementioning

confidence: 99%

mentioning

confidence: 99%

“…)],t hen *O 2 is reduced and protonated to COOH as the intermediate [Eq. (10)],a nd H 2 O 2 is subsequently generated and chemically bound with *toform *H 2 O 2 [Eq (11)…”

mentioning

confidence: 99%

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Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

et al. 2021

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“…The graphite electrode surface can be modified to enhance electrical conductivity by different materials, metal-based oxides, polymers, and carbon-based materials [15][16][17]. Graphene oxide (GO) and reduced graphene oxide (rGO) are widely acknowledged as effective coating materials on account of their exceptional characteristics, such as high specific surface area, electric conductivity, and good chemical stability [18,19].…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide coated graphite electrodes for treating Reactive Turquoise Blue 21 rinse water using an indirect electro-oxidation process

Vaghela

Nath²

2020

SN Appl. Sci.

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The present study deals with the decolourization of synthetic Reactive Turquoise Blue 21 (RTB21) dye-based model wastewater using an indirect electro-oxidation process and enhanced by modified graphite electrodes. Graphene oxide (GO) was successfully synthesized and deposited on the surface of pre-treated graphite electrodes. It was further reduced to form reduced graphene oxide (rGO). The resultant newly developed anode electrodes were designated as (Gr) 0 , (rGO/ Gr) 1 , and (rGO/Gr) 2 and used for the treatment of wastewater. Electrodes, thus developed, were characterized using Fourier-transform infrared spectroscopy, X-ray diffractions, Field emission scanning electron microscopy, and Contact angle (CA). The effect of process parameters such as initial pH, current density, electrolyte concentration, and temperature on the performance of novel anode electrodes was investigated. The colour removal efficiency was increased significantly almost 25.80% in the presence of a modified electrode with the highest efficiencies of about 96.69% in a natural pH environment, 200 A/m 2 , 2 g/L NaCl concentration, 30 °C temperature, and 15 min process time for 50 ppm RTB21 dye concentration for (rGO/Gr) 2 electrode. The RTB21 decolourization by indirect electro-oxidation process follows the pseudo-first-order kinetics, and the activation energy was estimated to be 23.42 kJ/mol. The stability of (rGO/ Gr) 2 electrode was also examined. The rGO coated electrode was a superior electrode for the indirect electro-oxidation process, giving enhanced colour removal (%).

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Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

et al. 2021

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show abstract

Synergistic degradation of antimicrobial agent ciprofloxacin in water by using 3D CeO2/RGO composite as cathode in electro-Fenton system

Cited by 38 publications

References 61 publications

Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

Reduced graphene oxide coated graphite electrodes for treating Reactive Turquoise Blue 21 rinse water using an indirect electro-oxidation process

Selective Electrocatalytic Reduction of Oxygen to Hydroxyl Radicals via 3‐Electron Pathway with FeCo Alloy Encapsulated Carbon Aerogel for Fast and Complete Removing Pollutants

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