Heterogeneous activation of persulfate by carbon nanofiber supported Fe3O4@carbon composites for efficient ibuprofen degradation

Zhang, Yang; Zhang, Bo-Tao; Teng, Yanguo; Zhao, Jingang; Sun, Xiaojie

doi:10.1016/j.jhazmat.2020.123428

Cited by 143 publications

(32 citation statements)

References 45 publications

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“…29 Three representative ICNFs were prepared from the precursor combinations of PAN/PMMA, PAN/PVP, and PAN/PMMA/PVP with iron(II) acetate as an iron precursor; these materials were labeled ICNF-1, ICNF-2, and ICNF-3, respectively. 30,31 Figure 1 shows the surface morphologies and interiors of the ICNFs obtained from the different polymer precursor combinations, where it was found that the diameter and morphology of the nanofibers were dependent on the polymer precursors. While the nanofibers in ICNF-1 and ICNF-3 were twisted and bent, those in ICNF-2 were straight.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Choi

et al. 2021

ACS Appl. Nano Mater.

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Improvements in Fenton reagents and processing systems are greatly desired. Here, we report the preparation of bifunctional iron/carbon nanofibers (ICNFs) with tailored microstructural characteristics for use as heterogeneous Fenton catalysts; these were constructed using binary/ternary polymer blends (polyacrylonitrile together with either/both poly(methyl methacrylate) or/and poly(N-vinyl-2-pyrrolidone)) and iron(II) acetate as carbon and transition-metal precursors, respectively. The microphase separation of the different polymers containing the iron precursor was employed to control the (i) textural and electrical properties of the resulting carbon nanofibers and (ii) size and spatial distribution of the formed iron phases. Promising ICNFs with large effective surface areas and high porosities were successfully produced. Since the ICNF Fenton catalysts are also electrically conductive, a flow-controllable system with an integrated electrochemical three-electrode setup was also built, in which the ICNFs were employed as the sensing electrode for the electrochemical detection of dye influx. Amperometric monitoring of the flow system allowed the rapid detection of the dye influx introduced into the system, and then the Fenton reaction, coupled with a cathodic electrodeposition process, proceeded to degrade the dye. Further optimization of such systems employing ICNFs as the sensing electrode and Fenton catalyst will likely lead to costeffective, energy-efficient water treatment processes.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Choi

et al. 2021

ACS Appl. Nano Mater.

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“…The best way to address this issue is to introduce magnetic particles to endow catalyst with magnetic response. Compared to other magnetic nanoparticles, nano-Fe 3 O 4 with a larger specific surface area can provide more contact area and active sites for PMS activation, and make the removal of pollutants have a higher effect [39,40]. More importantly, Fe 3 O 4 can be prepared by rapid chemical precipitation and its synthesis is simple.…”

Section: Introductionmentioning

confidence: 99%

Peroxymonosulfate activation by Co-doped magnetic Mn3O4 for degradation of oxytetracycline in water

Wang

et al. 2022

Environ Sci Pollut Res

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Co-doped magnetic Mn 3 O 4 was synthesized by the solvothermal method and adopted as an effective catalyst for the degradation of oxytetracycline (OTC) in water.Synergistic interactions between Co-Mn 3 O 4 and Fe 3 O 4 not only resulted in the enhanced catalytic activity through the activation of peroxymonosulfate (PMS) to degrade OTC, but also made Fe 3 O 4 /Co-Mn 3 O 4 easy to be separated and recovered from aqueous solution. 94.2% of OTC could be degraded within 60 min at an initial OTC concentration of 10 mg/L, catalyst dosage of 0.2 g/L and PMS concentration of 10 mM, the high efficiency of which was achieved in a wider pH range of 3.0-10.0.The free radical quenching experiments showed that O 2•radicals and 1 O 2 played the main role in the degradation process. Co 3+ , Co 2+ , Fe 2+ , Fe 3+ , Mn 4+ , Mn 3+ and Mn 2+ on Fe 3 O 4 /Co-Mn 3 O 4 were identified as catalytic sites based on XPS analysis. Eventually, the intermediates of OTC degradation were examined and the possible decomposition pathways were proposed. The excellent catalytic performance of Fe 3 O 4 /Co-Mn 3 O 4 not 2 only came from the fact that the large specific surface area could provide abundant active sites for the activation of PMS, but also the charged redistribution among atoms to accelerate the reduction of metal ions. The high degradation efficiency of OTC in actual water samples indicated that Fe 3 O 4 /Co-Mn 3 O 4 had good potential for practical application.

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“…Because Fe 3 O 4 has the characteristics of easy magnetic separation, stable properties, and low toxicity, Fe 2+ and Fe 3+ can be safely reacted with H 2 O 2 to trigger the Fenton reaction; in such cases, Fe 3 O 4 is a potential adsorbent and Fenton catalyst [11,12]. However, the H 2 O 2 -activating ability of pure Fe 3 O 4 is not strong, and the compound tends to agglomerate in the presence of strong magnetism, which inevitably results in a reduction of the adsorption capacity and catalytic activity [13].…”

Section: Introductionmentioning

confidence: 99%

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

et al. 2021

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Fe3O4@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO4, FeS2, and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.52 mg/g, and that the adsorption process was exothermic. Additionally, by employing H2O2 as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe3O4@C nanoparticles, while that of MB was only ~34% using pure Fe3O4 nanoparticles. The mechanism of H2O2 activated on the Fe3O4@C nanoparticles and the possible degradation pathways of MB are discussed. The Fe3O4@C nanoparticles retained high catalytic activity after five usage cycles. This work describes a facile method for producing Fe3O4@C nanoparticles with excellent catalytic reactivity, and therefore, represents a promising approach for the industrial production of Fe3O4@C nanoparticles for the treatment of high concentrations of dyes in wastewater.

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Heterogeneous activation of persulfate by carbon nanofiber supported Fe3O4@carbon composites for efficient ibuprofen degradation

Cited by 143 publications

References 45 publications

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Peroxymonosulfate activation by Co-doped magnetic Mn3O4 for degradation of oxytetracycline in water

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

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