Enhanced activation of PMS by a novel Fenton-like composite Fe3O4/S-WO3 for rapid chloroxylenol degradation

Lu, Jian; Zhou, Yi; Ling, Liangxiong; Zhou, Yanbo

doi:10.1016/j.cej.2022.137067

Cited by 65 publications

(2 citation statements)

References 59 publications

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“… 37 Lu et al found that the presence of Fe 2 O 3 ·H 2 O on the surface of heterogeneous catalysts at pH levels above 3, and their precipitation at pH levels of 5 and above, were the causes for the reduced effectiveness of the heterogeneous Fenton process. 38 TNT decomposition efficiency decreases at higher pH values possibly due to the weaker oxidants, such as ferryl ions ( e.g. , FeO 2+ ), that are formed at higher pH values (pH ≥ 5) with higher selectivity and superiority in reactions with organic compounds compared to ˙OH ( eqn (7) ).…”

Section: Resultsmentioning

confidence: 99%

Effective treatment of 2,4,6-trinitrotoluene from aqueous media using a sono–photo-Fenton-like process with a zero-valent iron nanoparticle (nZVI) catalyst

Van Nguyen,

Tung Pham,

et al. 2024

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Effective treatment of 2,4,6-trinitrotoluene from aqueous media using a sono–photo-Fenton-like process with a zero-valent iron nanoparticle (nZVI) catalyst

Van Nguyen,

Tung Pham,

et al. 2024

RSC Adv.

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“…•− , 2.5-3.1 V) and hydroxyl radicals (•OH, 1.9-2.7 V), activated through heat, UV radiation, alkalinity, and metal ions [7]. Iron and its oxides, particularly rich in ferrous like Fe 3 O 4 , are extensively studied catalysts, known for their efficiency, low toxicity, and cost-effectiveness [8]. However, the inherent magnetic properties and high surface energy of Fe 3 O 4 lead to agglomeration, diminishing its catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Ligand Effect in β-CD@Fe3O4 Composites to Activate Peroxymonosulfate for Efficient Degradation of Pharmaceutical Contaminants: A Study Employing Density Functional Theory

Quan,

Lv,

Yin

et al. 2024

Coatings

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This study presents a detailed investigation into the use of β-cyclodextrin (β-CD) encapsulated iron oxide nanoparticle (β-CD@Fe3O4) composites, modified with different ligands, to activate peroxymonosulfate (PMS) for the degradation of pharmaceutical contaminants, namely, diclofenac, carbamazepine, and erythromycin. The focus is on understanding the ligand effect, particularly using citric acid (CIT), polyethyleneimine (PEI), and cetyl trimethyl ammonium bromide (CTAB), on the degradation performance of these composites. Employing density functional theory (DFT) calculations, this work examines the electronic structure and charge distributions of β-CD@Fe3O4 composites, providing insights into their interaction with various pollutants. The study reveals that the β-CD@PEI@Fe3O4 composite demonstrates superior degradation efficiency due to optimal electrostatic interactions, regardless of the pollutant’s hydrophobicity. On the other hand, β-CD@CIT@Fe3O4 shows moderate efficiency, and β-CD@CTAB@Fe3O4 exhibits selective efficiency, particularly for hydrophobic compounds. These findings underscore the significant role of surface chemistry in modulating the activation of PMS and the degradation of contaminants, opening avenues for designing tailored β-CD composites for environmental remediation.

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Oxygen Vacancies in Piezoelectric ZnO Twin‐Mesocrystal to Improve Peroxymonosulfate Utilization Efficiency via Piezo‐Activation for Antibiotic Ornidazole Removal

et al. 2023

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Piezoelectric mesocrystals as defective materials have been demonstrated to possess adsorptive and catalytic properties in redox reactions. However, there is still a lack of research on the quantitative relationship between the defect concentration and the piezocatalytic performance in piezoelectric mesocrystals. Herein, twin‐hierarchical structure ZnO piezoelectric mesocrystals are taken with different oxygen‐vacancies (OVs) concentrations to quantitatively investigate the effect of defect content on the peroxymonosulfate (PMS) piezo‐activation in water purification. The ZnO piezoelectric mesocrystal with moderate OVs concentration exhibits a rapid antibiotic ornidazole (ORZ) pollutants degradation rate (0.034 min−1) and achieves a high PMS utilization efficiency (0.162) that exceeds the most state‐of‐the‐art catalytic processes, while excessive OVs suppressed the piezocatalytic performance. Through calculations of electron property and reactants affinity, a quantitative relationship between OVs concentration and piezocatalytic properties is established. The ZnO mesocrystal with moderate OVs concentration realized increased electron delocalization, reduced charge transfer barrier, and enhanced reactants affinity, thus accelerating the kinetics of PMS activation. This work provides theoretical guidance for the application of defect engineering in mesocrystal to realize enhanced piezocatalytic performance.

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Enhanced activation of PMS by a novel Fenton-like composite Fe3O4/S-WO3 for rapid chloroxylenol degradation

Cited by 65 publications

References 59 publications

Effective treatment of 2,4,6-trinitrotoluene from aqueous media using a sono–photo-Fenton-like process with a zero-valent iron nanoparticle (nZVI) catalyst

Effective treatment of 2,4,6-trinitrotoluene from aqueous media using a sono–photo-Fenton-like process with a zero-valent iron nanoparticle (nZVI) catalyst

Insights into the Ligand Effect in β-CD@Fe3O4 Composites to Activate Peroxymonosulfate for Efficient Degradation of Pharmaceutical Contaminants: A Study Employing Density Functional Theory

Oxygen Vacancies in Piezoelectric ZnO Twin‐Mesocrystal to Improve Peroxymonosulfate Utilization Efficiency via Piezo‐Activation for Antibiotic Ornidazole Removal

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