Selective formation of reactive oxygen species in peroxymonosulfate activation by metal-organic framework-derived membranes: A defect engineering-dependent study

Li, Mohua; You, Shijie; Duan, Xiaoguang; Liu, Yanbiao

doi:10.1016/j.apcatb.2022.121419

Cited by 89 publications

(31 citation statements)

References 50 publications

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“…Vacancies are easily generated during the preparation of catalysts, and the general methods of generating vacancies include hydrogen reduction, solution reduction, ,, and heat treatment reduction . There are also some special vacancy generation methods, such as atom doping ,, and oxygen-poor heat treatment. , They can introduce some vacancies, and the concentration of vacancies can also be increased by the atomic escape caused by balancing the charge during the formation of heterojunctions , and the decrease in the crystallinity brought by the introduction of microfragments . In addition, the vacancy itself can also serve as an active site, exhibiting catalytic properties.…”

Section: Summary and Outlookmentioning

confidence: 99%

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Current Mechanism of Peroxymonosulfate Activation by Cobalt-Based Heterogeneous Catalysts in Degrading Organic Compounds

et al. 2023

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Persulfate based advanced oxidation processes (PS-AOPs) have been regarded as a mainstream degradation technology of organic compounds due to their high efficiency in wastewater treatment. In particular, peroxymonosulfate (PMS) has a unique structure and chemical properties, which can be efficiently activated by Co-based catalysts to produce active species with a high oxidation potential. These active species usually determine the subsequent degradation of organic compounds in an efficient process, while the intrinsic reaction mechanism behind this complex process remains unclear and therefore impedes the continual development in this scientific community. Recently, density functional theory (DFT) calculations have emerged as a powerful means to identify the electronic properties and distinguish energy changes in the PMS activation system. With the assistance of this quantum calculation, increasing investigations have been conducted focusing on explaining the phenomenon that occurred in experiments. However, these calculations mainly contributed in part to the reaction mechanism of PMS activation by Co-based catalysts and sometimes even differ from each other, lacking a comprehensive summary based on DFT calculation results. In this review, we introduce the main uses of DFT in the catalytic activation of PMS, provide recent application of calculation examples of Co-based heterogeneous catalysts with different structures, and then discuss the mechanism of PMS activation in detail. Finally, the research results of the DFT method in this field are summarized, and the future research focus and challenges are put forward, which is conducive to guiding the practical design of Co-based catalysts and further application of PS-AOPs in creating value products.

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Section: Summary and Outlookmentioning

confidence: 99%

“…63 3c,d. 60,116 Co 3 O 4 particles have a larger specific surface area and active sites. 39,117 Ma et al 69 proposed a three-dimensional ordered mesoporous Co 3 O 4 (3D OM-Co 3 O 4 ) structure with OVs.…”

Section: Adsorption and Electron Transfermentioning

confidence: 99%

Current Mechanism of Peroxymonosulfate Activation by Cobalt-Based Heterogeneous Catalysts in Degrading Organic Compounds

et al. 2023

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“…Due to the fact that the Cr(VI) to Cr(III) reaction is electron-consuming, the efficiency of a photocatalyst to reduce Cr(VI) is usually associated with its capacity to donate electrons to the Cr(VI) oxyanions. Nevertheless, the ROS generation involves oxidative paths that can serve as a secondary electron source that can participate in side reactions during the Cr(VI) photoreduction process [ 181 ].…”

Section: Experimental Protocolsmentioning

confidence: 99%

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

et al. 2022

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Hexavalent chromium (Cr(VI)) is a highly mobile cancerogenic and teratogenic heavy metal ion. Among the varied technologies applied today to address chromium water pollution, photocatalysis offers a rapid reduction of Cr(VI) to the less toxic Cr(III). In contrast to classic photocatalysts, Metal-Organic frameworks (MOFs) are porous semiconductors that can couple the Cr(VI) to Cr(III) photoreduction to the chromium species immobilization. In this minireview, we wish to discuss and analyze the state-of-the-art of MOFs for Cr(VI) detoxification and contextualizing it to the most recent advances and strategies of MOFs for photocatalysis purposes. The minireview has been structured in three sections: (i) a detailed discussion of the specific experimental techniques employed to characterize MOF photocatalysts, (ii) a description and identification of the key characteristics of MOFs for Cr(VI) photoreduction, and (iii) an outlook and perspective section in order to identify future trends.

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“…Functional adsorption materials with microporous frameworks such as resins and coordination polymers have become a hot topic in the chemistry and materials community in the last few decades. [1][2][3][4][5][6][7][8][9] The boom of functional adsorption materials is attributed to their high framework designability, which provides the unique properties that chemists expect. Among the properties of these functional adsorbent materials, the dynamic adsorption behavior based on a flexible framework has attracted the interest of researchers, such as the reversible volume expansion/contraction that occurs during the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent advances and potential applications of flexible adsorption and separation materials: A review

Qiang

2022

Energy Science & Engineering

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In adsorption processes of the liquid or gas phase, a particular dynamic adsorption behavior caused by the reversible mechanical deformation (expansion or contraction) of absorption materials driven by the host–guest interaction is called “flexible adsorption,” and the materials with this particular behavior can be called “flexible adsorption materials.” Flexible absorption materials, such as crosslinked polymers, have received much attention from researchers due to their flexible framework structure and specific adsorption kinetics. They have shown great potential in gas storage and other energy applications. This paper reviews recent advances in the definition, theoretical development, and classification of flexible absorption materials. Potential application examples of flexible absorption materials in gas/liquid absorption and separation, functional devices, and energy catalysis are analyzed to guide their development.

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Selective formation of reactive oxygen species in peroxymonosulfate activation by metal-organic framework-derived membranes: A defect engineering-dependent study

Cited by 89 publications

References 50 publications

Current Mechanism of Peroxymonosulfate Activation by Cobalt-Based Heterogeneous Catalysts in Degrading Organic Compounds

Current Mechanism of Peroxymonosulfate Activation by Cobalt-Based Heterogeneous Catalysts in Degrading Organic Compounds

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

Recent advances and potential applications of flexible adsorption and separation materials: A review

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