Degradation of bisphenol A by persulfate activation via oxygen vacancy-rich CoFe2O4–x

Wu, Longmin; Zhang, Qian; Hong, Ji-Hyung; Dong, Zheng-Yu; Ji, Wang

doi:10.1016/j.chemosphere.2019.01.049

Cited by 129 publications

(46 citation statements)

References 46 publications

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“…60 In addition, oxygen vacancies promote electronic transfer and participate in the redox cycle of Ni 2+ /Ni 3+ , which is feasible for the activation of PMS. 61…”

Section: Resultsmentioning

confidence: 99%

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Sun

Liu

et al. 2019

ACS Omega

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In this work, we successfully prepared three different mesoporous NiO nanostructures with preferential (111) planes using three different solvents–water, a water–ethanol mixture, and a water–ethylene glycol mixture. The NiO nanosheets prepared from the water–ethylene glycol mixture and denoted as NiO-EG showed a nanosheet morphology thinner than 10 nm, whereas the water–ethanol and water samples were 30–40 nm and above 100 nm thick, respectively. The NiO-EG catalyst was found to exhibit a high catalyzing ability to activate peroxymonosulfate (PMS) for decoloring dyes, by which 94.4% of acid orange 7 (AO7) was degraded under the following reaction conditions: AO7 = 50 mg/L, catalyst = 0.2 g/L, PMS = 0.8 g/L, pH = 7, and 30 min reaction time. The dye degradation rate was investigated as a function of the catalyst dosage, pH, and dye concentration. According to quenching experiments, it was found that SO4•–, HO•, and O2•– were the dominant radicals for AO7 degradation, and oxygen vacancies played a significant role in the generation of radicals. High surface area, thin flaky structure, rich oxygen vacancies, fast charge transport, and low diffusion impedance all enhanced the catalytic activity of NiO-EG, which exhibited the highest degradation ability due to its abundant accessible active sites for both adsorption and catalysis.

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“…60 In addition, oxygen vacancies promote electronic transfer and participate in the redox cycle of Ni 2+ /Ni 3+ , which is feasible for the activation of PMS. 61…”

Section: Resultsmentioning

confidence: 99%

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Sun

Liu

et al. 2019

ACS Omega

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“…• − presents a higher standard of redox potential of 2.5-3.1 V, and persists longer in aqueous solutions and in a wide pH range. 11 Thus, it is considered a more efficient oxidizing species in complex environmental matrices. SO 4…”

Section: Introductionmentioning

confidence: 99%

“…It employs various oxidants, such as hydrogen peroxide (H 2 O 2 ), ozone (O 3 ), peroxymonosulfate (PMS), and persulfate (PS), 10 which can produce reactive radicals. Contrary to •OH, SO 4 •− presents a higher standard of redox potential of 2.5–3.1 V, and persists longer in aqueous solutions and in a wide pH range 11 . Thus, it is considered a more efficient oxidizing species in complex environmental matrices.…”

Section: Introductionmentioning

confidence: 99%

Magnetic mesoporous FeCo₂O₄–Fe₃O₄ microrods as novel peroxymonosulfate activators for effective metronidazole degradation

Ren

Han

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Metronidazole (MNZ) is a highly typical representative antibiotic widely occurring in wastewaters. Its release poses potential threats to the environment and human health. Advanced oxidation processes based on heterogeneous catalysis are promising technologies for organic matter removal. In this study, a new type of magnetic mesoporous FeCo 2 O 4-Fe 3 O 4 microrods was prepared and evaluated as catalyst to activate peroxymonosulfate (PMS) for metronidazole (MNZ) degradation. RESULTS: The effects of catalyst dosage, PMS concentration, and pH on MNZ degradation were investigated. A 96.8% removal of MNZ (100 mg L −1) was attained in the FeCo 2 O 4-Fe 3 O 4 /PMS under the optimum conditions of 4 mM PMS, 0.4 g L −1 FeCo 2 O 4-Fe 3 O 4 loading, pH 7 and 60 min reaction time. The hydroxyl radicals (•OH) and sulfate radicals (SO 4 •−) were identified as the primary reactive species attributed to MNZ removal. The plausible mechanism of the catalytic degradation was proposed and assumed to be related to the Co/Fe species that exerted the synergistic effect during reactions. FeCo 2 O 4-Fe 3 O 4 showed excellent reusability and stability, which was testified by the successive degradation experiments. More importantly, FeCo 2 O 4-Fe 3 O 4 exhibited general applicability in eliminating various antibiotics, including ciprofloxacin, 2,4-dichlorophenol, ofloxacin, and tetracycline. The efficiencies of which were 78.8%, 77.1%, 81.3%, and 60.7%, respectively, under identical reaction conditions as MNZ. CONCLUSION: This study proved that mesoporous FeCo 2 O 4-Fe 3 O 4 microrods are efficient PMS activators and provided a novel strategy for developing FeCo 2 O 4-based catalysts for the removal of organic pollutants from water.

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“…These magnetic composites belong to a new type of multifunctional materials combining properties of ordinary polymers and magnetic materials. These materials have been proposed for many applications ; among them, several studies have been addressed to microwave shielding . All these applications reveal the importance of studying these materials from both applied and fundamental points of view.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and conducting composites of cobalt ferrite nanorods in a polyaniline matrix

Saggión

Antonel

Molina

2020

Polymer Engineering & Sci

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Composites of cobalt ferrite nanorods in a polyaniline matrix have been synthesized and characterized by electron microscopy observation, X‐ray diffraction, infrared spectroscopy, thermogravimetric analysis, electrical conductivity, and DC magnetization measurements. The composites were prepared using dodecylbenzenesulphonic acid both as a particle protector and as acid media. In the magnetic experiments, hysteresis loops were observed, revealing ferromagnetism for both particles and composites. The results indicate that the magnetic properties of the particles were preserved in the composites, and on the other hand, the conductivity was almost independent on the polymer/particle ratio. These composites are new materials that show easily tunable magnetic properties, and are expected to be candidates for applications such as microwave shields. POLYM. ENG. SCI., 60:597–606, 2020. © 2020 Society of Plastics Engineers

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Degradation of bisphenol A by persulfate activation via oxygen vacancy-rich CoFe2O4–x

Cited by 129 publications

References 46 publications

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Magnetic mesoporous FeCo₂O₄–Fe₃O₄ microrods as novel peroxymonosulfate activators for effective metronidazole degradation

Magnetic and conducting composites of cobalt ferrite nanorods in a polyaniline matrix

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Degradation of bisphenol A by persulfate activation via oxygen vacancy-rich CoFe2O4–x

Cited by 129 publications

References 46 publications

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes

Magnetic mesoporous FeCo2O4–Fe3O4 microrods as novel peroxymonosulfate activators for effective metronidazole degradation

Magnetic and conducting composites of cobalt ferrite nanorods in a polyaniline matrix

Contact Info

Product

Resources

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Magnetic mesoporous FeCo₂O₄–Fe₃O₄ microrods as novel peroxymonosulfate activators for effective metronidazole degradation