Electric field induced activated carbon fiber (ACF) cathode transition from an initiator/a promoter into an electrocatalyst in ozonation process

Zhang, Xianke; Zhou, Yu; Zhao, Chun; Sun, Zhenzhen; Zhang, Zhengan; Mirza, Zakaria A.; Saylor, Greg L.; Zhai, Jun; Zheng, Huaili

doi:10.1016/j.cej.2016.06.079

Cited by 45 publications

(7 citation statements)

References 14 publications

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“…Producing hydroxyl radicals ( • OH, E 0 = 2.80 V NHE ) in situ is of great interest to a broad chemistry world because they are active species not only for the oxidative destruction of organic pollutants and bacteria − but also in organic synthesis, polymerization, zeolite synthesis, and protein modification . In general, O 3 or H 2 O 2 can be individually transformed into • OH with the aid of specific catalysts, but these processes still suffer from a relatively low catalytic efficiency, catalyst deactivation/decomposition, and the derived secondary pollution. − Alternatively, the coexistence of O 3 and H 2 O 2 without any catalyst (known as the peroxone reaction) is able to spontaneously produce • OH as well, − but this reaction rate constant ( k ) depends strongly on the pH of the aqueous solution. There exists a ca.…”

Section: Introductionmentioning

confidence: 99%

Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

et al. 2019

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The peroxone reaction between O3 and H2O2 has been deemed a promising technology to resolve the increasingly serious water pollution problem by virtue of the generation of superactive hydroxyl radicals (•OH), but it suffers greatly from an extremely limited reaction rate constant under acidic conditions (ca. less than 0.1 M–1 s–1 at pH 3). This article describes a heterogeneous catalyst composed of single Mn atoms anchored on graphitic carbon nitride, which effectively overcomes such a drawback by altering the reaction pathway and thus dramatically promotes •OH generation in acid solution. Combined experimental and theoretical studies demonstrate Mn–N4 as the catalytically active sites. A distinctive catalytic pathway involving HO2 • formation by the activation of H2O2 is found, which gets rid of the restriction of HO2 – as the essential initiator in the conventional peroxone reaction. This work offers a new pathway of using a low-cost and easily accessible single-atom catalyst (SAC) and could inspire more catalytic oxidation strategies.

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Section: Introductionmentioning

confidence: 99%

Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

et al. 2019

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“…•OH during the electrolysis process, and •OH has a strong ability to oxidize and degrade SMT. In addition to the indirect oxidation of OH, oxidation reactions occur to the main electrode (anode) and the particle electrode, and the charge transfer among them effectively degrades SMT (Zhang et al, 2016.). The experiments also show that in addition to hydroxyl radicals, SMT also has direct oxidation and another degradation mechanism in the degradation process.…”

Section: The In Uence Of Cell Voltage On Smt Removal E Ciencymentioning

confidence: 82%

Electrocatalytic Degradation of Sulfameth Thiadiazole by GAC@Ni/Fe Three-Dimensional Particle Electrode

Lin

Zhu

et al. 2021

Preprint

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In this work, GAC@Ni/Fe particle electrodes were prepared and employed for the degradation of Sulfamethylthiadiazole (SMT) by three-dimensional electrocatalytic technology.The effects of particle electrode bi-metal loading ratio, cell voltage, particle electrode dosage, electrode plate spacing and SMT initial concentration on SMT removal were studied.In addition, GAC@Ni/Fe particle electrode was analyzed by the scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), X-ray photoelectron spectrometer (XPS) and Fourier transform infrared spectrometer (FTIR) to characterize . which indicated that a significant amount of Iron-nickel oxide were formed on the surface of GAC@Ni/Fe particle electrode.The results indicated that when the nickel-iron loading ratio is 1:1, the SMT removal effect is the best, and the removal rate can reach 90.89% within 30 minutes,Compared with the granular activated carbon without bimetal, the removal efficiency is increased by 37.58%. The degradation of SMT in the GAC@Ni/Fe particle three-dimensional electrode reactor is the joint result of both direct oxidation and indirect oxidation. The contribution rates of direct oxidation of anode and particle electrode and indirect oxidation of ·OH in the degradation are 32%, 27% and 41%, respectively. Based on the intermediate detected by ultra high liquid chromatography and the calculation of bond energy of SMT molecule by Gauss software，the degradation pathway of SMT in the GAC@Ni/Fe three-dimensional electrode reactor is proposed. This research provides a green, healthy and effective method for removing sulfonamide micro-polluted wastewater.

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“…So, it is urgent to treat the NB wastewater. Methods are available for treating NB wastewater mainly including photocatalytic degradation [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], ozonation biodegradation [ 14 , 15 , 16 , 17 , 18 ], and adsorption [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Adsorption is the most common treatment for removing NB from wastewater, and activated carbon is the dominating adsorbent material.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Novel Cellulose–Styrene Copolymer Adsorbent and Its Adsorption of Nitrobenzene from Aqueous Solutions

Yang

Lin

et al. 2021

Polymers

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A novel cellulose–styrene copolymer adsorbent (cellulose-St) was prepared using free radical polymerization. Successful polymerization was confirmed through Fourier Transform Infrared Spectroscopy (FTIR), Carbon 13 Solid Nuclear Magnetic Resonance (13C NMR) Spectroscopy, Scanning Electron Microscopy (SEM), etc. Cellulose-St possessed good hydrophobicity, and the best water contact angle of cellulose-St samples could reach 146°. It had the ability of adsorption for nitrobenzene (NB), and the adsorption process could be well described by the pseudo-second-order (R2 > 0.99) and three-stage intraparticle diffusion (R2 > 0.99) kinetic models. Furthermore, the dynamic adsorption experiments revealed that cellulose-St had the potential for continuous separation of NB in water, and the breakthrough point for the initial NB concentration of 10 mg/L reached 1.275 L/g. Moreover, cellulose-St exhibited excellent environmental adaptability that it could maintain its hydrophobicity and adsorption ability for NB in strong acids, strong alkalis, or organic solvents. The used cellulose-St could be reused after washing with ethanol and keep almost constant adsorption capacity after ten cycles.

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Electric field induced activated carbon fiber (ACF) cathode transition from an initiator/a promoter into an electrocatalyst in ozonation process

Cited by 45 publications

References 14 publications

Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Electrocatalytic Degradation of Sulfameth Thiadiazole by GAC@Ni/Fe Three-Dimensional Particle Electrode

Preparation of a Novel Cellulose–Styrene Copolymer Adsorbent and Its Adsorption of Nitrobenzene from Aqueous Solutions

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Electric field induced activated carbon fiber (ACF) cathode transition from an initiator/a promoter into an electrocatalyst in ozonation process

Cited by 45 publications

References 14 publications

Single-Atom Mn–N4 Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Single-Atom Mn–N4 Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Electrocatalytic Degradation of Sulfameth Thiadiazole by GAC@Ni/Fe Three-Dimensional Particle Electrode

Preparation of a Novel Cellulose–Styrene Copolymer Adsorbent and Its Adsorption of Nitrobenzene from Aqueous Solutions

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Resources

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Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution