Mechanochemical synthesis of biochar encapsulated FeMn nanoparticles with strong metal–carbon interactions for efficient degradation of tetracycline via activating peroxymonosulfate

Wang, Yue; Liu, Zhenglong; Huang, Pan; Lei, Baoliang; Qiao, Lele; Li, Tielong; Lin, Kun-Yi Andrew; Wang, Haitao

doi:10.1016/j.cej.2023.147525

Cited by 22 publications

(2 citation statements)

References 84 publications

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“…Based on the results mentioned above, the possible sources of 1 O 2 generation were explored. In general, three pathways are identified for 1 O 2 generation: 1) PMS autolysis, 2) conversion of O 2 •– and 3) energy/charge transfer originating from O 2 . , PMS autolysis had little effect on TC degradation, as shown in Figure S9a. Both oxygen-rich and anoxic conditions had negligible impact on TC degradation, suggesting that O 2 itself does not directly contribute to 1 O 2 generation (Figure S17).…”

Section: Resultsmentioning

confidence: 97%

Plant Polyphenol-Driven Polymerization-Confinement Strategy toward Ultrahighly Loaded Atomically Dispersed FeCo Bimetallic Catalysts for Singlet Oxygen-Dominated Fenton-like Reactions

Wang,

Liu,

Kang

et al. 2024

ACS EST Eng.

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Recent progress has brought carbon-confined transition metal catalysts to the forefront as effective agents for Fenton-like reactions. However, achieving a stable integration of densely loaded and well-dispersed transition metals onto carbon support poses significant challenges. Herein, we introduce a plant polyphenol-driven polymerization-confinement method for the synthesis of a highly dispersed FeCo bimetallic catalyst (FeCo@NGB). Utilizing the chelating effect of tea polyphenols with metal ions and their subsequent polymerization and confinement offers a durable solution for stabilizing the FeCo bimetallic sites. The resulting FeCo@NGB demonstrates exceptional performance in activating peroxymonosulfate (PMS) for the swift degradation of tetracycline (TC), with a 99.5% reduction achieved in just 30 min, predominantly through a singlet oxygen (1O2)-driven pathway. Experimental and theoretical calculations highlight the pivotal role of atomically dispersed FeN4–CoN3 sites in facilitating rapid electron transfer between the catalyst and PMS, thereby enhancing 1O2 production. This work not only advances the development of high-performance multiphase catalysts but also introduces a compelling strategy for water purification leveraging nonradical oxidative pathways.

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Section: Resultsmentioning

confidence: 97%

Plant Polyphenol-Driven Polymerization-Confinement Strategy toward Ultrahighly Loaded Atomically Dispersed FeCo Bimetallic Catalysts for Singlet Oxygen-Dominated Fenton-like Reactions

Wang,

Liu,

Kang

et al. 2024

ACS EST Eng.

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“…To further determine the degradation mechanism of TC by M(AC-PS), the electron transfer process was verified by electrochemical tests (Figure 7). When the prepared material was used as an electrode, the internal electron transfer ability of the material and the electron transport between material and contaminant can be confirmed by the current changes in the presence or absence of PS and before and after the addition of TC [67,68]. From the i-t curves of MAC and M(AC-PS) (Figure 7a), it can be observed that the current in the M(AC-PS) system gradually decreases to a stable value, while the current in the MAC system remains at 0 in the three-electrode system, indicating the better conductivity of M(AC-PS).…”

Section: Analysis Of the Tc Degradation Mechanism Of M(ac-ps)mentioning

confidence: 95%

Synthesis of Integrated Material with Activation and Oxidation Functions by Mechanical Milling of Activated Carbon and Persulfate for Enhanced Tetracycline Degradation over Non-Radical Mechanism

Tan,

Meng,

Cao

et al. 2024

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As an alternative to the traditional advanced oxidation process of adding potassium persulfate (PS) and its activator to the solution separately, in this study, M(AC-PS), an integrated activator and catalyst, was synthesized by vacuum ball milling of PS and activated carbon (AC) to improve the PS’s utilization efficiency. The joint mechanical milling caused a change in the preferentially exposed crystal surface of the PS and the generation of more π-π* structures on the AC, leading to successful and stable connection of the PS onto the surface of the AC. Within 40 min, the M(AC-PS) achieved a degradation rate of 97.3% for tetracycline (TC, 20 mg/L), while the mixed system where AC and PS were separately ball milled achieved only a 53.1% removal of TC. Reactive oxygen species and electrochemical tests showed that M(AC-PS) mainly oxidized TC through non-free radical mechanisms. In M(AC-PS), AC provided oxygen-containing functional groups (e.g., C=O) to activate the PS and electron holes as an electron transfer medium, generating 1O2 and promoting electron donation from the TC to enhance the oxidation of the TC. Almost no catalytic components were detected in the solution, indicating that the obtained solid composite material avoids the limitations of solid–liquid interface contact and mass transfer, and then improves the efficiency of activation and catalysis. This study presents a simple and feasible method for obtaining efficient and convenient material for the advanced oxidation treatment of wastewater.

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Prussian Blue Analogue‐Based Materials: Synthesis and Their Application in Peroxymonosulfate Activation for Wastewater Treatment

Zhang,

Zhang

2024

ChemCatChem

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Peroxymonosulfate (PMS) based advanced oxidation processes (AOPs) are effective in degrading refractory organic pollutants in water. The unique internal chemical tunability of Prussian blue analogues (PBAs), a type of metal‐organic framework materials (MOFs), makes them promising catalysts for PMS‐AOPs. However, the pristine PBA is limited in practical application due to its structural instability and easy leaching of metal ions. To this end, various methods have been developed to enhance the catalytic performance of PBAs. In this paper, the recent advances in the modification and composite strategies of PBA catalysts are systematically reviewed. PBA modification by the regulation of synthesis conditions and post‐synthesis treatment, along with composite strategies involving metal and non‐metal based materials are introduced. The structural morphology improvement, physical and chemical property adjustment, vacancy design and crystal surface modulation of PBAs induced by these modification and composite strategies are discussed in depth. In addition, the performance of the modified and composite catalysts to activate PMS for organic pollutant degradation is demonstrated. The radical pathway via SO4•‐, •OH and O2•‐, non‐radical pathway through 1O2, electron transfer process and high‐valence metal‐oxygen species, or a combination of radical and non‐radical pathways are revealed in PMS‐AOPs with PBAs and their derivatives as catalysts.

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Mechanochemical synthesis of biochar encapsulated FeMn nanoparticles with strong metal–carbon interactions for efficient degradation of tetracycline via activating peroxymonosulfate

Cited by 22 publications

References 84 publications

Plant Polyphenol-Driven Polymerization-Confinement Strategy toward Ultrahighly Loaded Atomically Dispersed FeCo Bimetallic Catalysts for Singlet Oxygen-Dominated Fenton-like Reactions

Plant Polyphenol-Driven Polymerization-Confinement Strategy toward Ultrahighly Loaded Atomically Dispersed FeCo Bimetallic Catalysts for Singlet Oxygen-Dominated Fenton-like Reactions

Synthesis of Integrated Material with Activation and Oxidation Functions by Mechanical Milling of Activated Carbon and Persulfate for Enhanced Tetracycline Degradation over Non-Radical Mechanism

Prussian Blue Analogue‐Based Materials: Synthesis and Their Application in Peroxymonosulfate Activation for Wastewater Treatment

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