Heterogeneous activation of peroxygens by iron-based bimetallic nanostructures for the efficient remediation of contaminated water. A review

Kifle, Ghebretensae Aron; Huang, Yuan; Xiang, Minghui; Wang, Wenbing; Wang, Chen; Li, Chunyang; Li, Hui

doi:10.1016/j.cej.2022.136187

Cited by 35 publications

(6 citation statements)

References 144 publications

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“…However, when the Fe( ii ) concentration was further increased threefold, the R mt increased by only 8.4%, probably because excess Fe( ii ) would consume the generated reactive species (eqn (5)). 45,46 This inference was validated with the addition of higher concentrations of Fe( ii ) (1.5, 3, and 15 mM). Interestingly, the R mt decreased slightly when the Fe( ii ) concentration further increased from 0.6 mM to 15 mM.…”

Section: Resultsmentioning

confidence: 78%

Tannic acid promotes the activation of persulfate with Fe(ii) for highly efficient trichloroethylene removal

Che,

Su,

Zhao

et al. 2023

RSC Adv.

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Section: Resultsmentioning

confidence: 78%

Tannic acid promotes the activation of persulfate with Fe(ii) for highly efficient trichloroethylene removal

Che,

Su,

Zhao

et al. 2023

RSC Adv.

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“…Generally, sulfate radical (SO 4 •– ) could be effectively generated via activating PS, including peroxymonosulfate (PMS, HSO 5 – ) and peroxydisulfate (PDS, S 2 O 8 2– ), with the assistance of external energies (e.g., heat, − plasma, light, − electricity, , microwave, , and ultrasound , ) and/or homogeneous/heterogeneous , catalysts (e.g., metal , (such as Fe, − Co, ,, Cu, Mn, and Mo)-based, carbon − (such as graphene, carbon nanotube, , and char , )-based, and metal–carbon hybrid-based). Lin et al indicated that SO 4 •– stemming from PS might not be strictly claimed as a kind of reactive oxygen species (ROS), differently from the classical ROS (e.g., hydroxyl radical (HO • ), superoxide radical (O 2 •– ), and singlet oxygen ( 1 O 2 )) whose origins are molecular oxygen .…”

Section: Basic Concepts Cognitive Biases and Experimental Detailsmentioning

confidence: 99%

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Hu,

Zhu

2024

Environ. Sci. Technol.

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Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases and appeals to pay more attention to experimental details in PS-AOPs, so as to accurately explore reaction mechanisms. The review scientifically summarizes the character, generation, and identification of different reactive species. It then highlights the complexities about the analysis of electron paramagnetic resonance, the uncertainties about the use of probes and scavengers, and the necessities about the determination of scavenger concentration. The importance of the choice of buffer solution, operating mode, terminator, and filter membrane is also emphasized. Finally, we discuss current challenges and future perspectives to alleviate the misinterpretations toward reactive species and reaction mechanisms in PS-AOPs.

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“…Compared to monometallic MOFs, bimetallic MOFs exhibit unique synergistic effects between two distinct metal elements, leading to higher stability and catalytic efficiency. The Fenton-like reaction of bimetallic MOFs and persulfate-based advanced oxidation processes have found widespread application in water treatment to degrade emerging pollutants [67]. In their research, He et al [10] suggested that the energy efficiency of a synergistic catalytic system is higher than that of a single system.…”

Section: Fenton-like Reaction Of Bimetallic Mofsmentioning

confidence: 99%

Synthesis and Peroxide Activation Mechanism of Bimetallic MOF for Water Contaminant Degradation: A Review

et al. 2023

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Metal–organic framework (MOF) materials possess a large specific surface area, high porosity, and atomically dispersed metal active sites, which confer excellent catalytic performance as peroxide (peroxodisulfate (PDS), peroxomonosulfate (PMS), and hydrogen peroxide (H2O2)) activation catalysts. However, the limited electron transfer characteristics and chemical stability of traditional monometallic MOFs restrict their catalytic performance and large-scale application in advanced oxidation reactions. Furthermore, the single-metal active site and uniform charge density distribution of monometallic MOFs result in a fixed activation reaction path of peroxide in the Fenton-like reaction process. To address these limitations, bimetallic MOFs have been developed to improve catalytic activity, stability, and reaction controllability in peroxide activation reactions. Compared with monometallic MOFs, bimetallic MOFs enhance the active site of the material, promote internal electron transfer, and even alter the activation path through the synergistic effect of bimetals. In this review, we systematically summarize the preparation methods of bimetallic MOFs and the mechanism of activating different peroxide systems. Moreover, we discuss the reaction factors that affect the process of peroxide activation. This report aims to expand the understanding of bimetallic MOF synthesis and their catalytic mechanisms in advanced oxidation processes.

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Heterogeneous activation of peroxygens by iron-based bimetallic nanostructures for the efficient remediation of contaminated water. A review

Cited by 35 publications

References 144 publications

Tannic acid promotes the activation of persulfate with Fe(ii) for highly efficient trichloroethylene removal

Tannic acid promotes the activation of persulfate with Fe(ii) for highly efficient trichloroethylene removal

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Synthesis and Peroxide Activation Mechanism of Bimetallic MOF for Water Contaminant Degradation: A Review

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