4.7 Review

Mechanochemical synthesis of catalysts and reagents for water decontamination: Recent advances and perspective

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Article Engineering, Environmental

Activation of peroxymonosulfate by single-atom Fe-g-C3N4 catalysts for high efficiency degradation of tetracycline via nonradical pathways: Role of high-valent iron-oxo species and Fe-Nx sites

Xiaoming Peng et al.

Summary: A Fenton-like catalyst was prepared using isolated Fe single-atom and Fe clusters anchored onto a g-C3N4 framework for the heterogeneous activation of peroxymonosulfate (PMS) to degrade tetracycline (TC). The single Fe atoms served as active sites with optimal binding energy for PMS activation, leading to the production of high-valent iron-oxo species and single oxygen-dominated nonradical processes causing TC degradation. This study demonstrates the superior catalytic activity of single Fe atoms compared to Fe clusters in the activation of PMS for TC degradation.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Magnetic ball-milled FeS@biochar as persulfate activator for degradation of tetracycline

Juan He et al.

Summary: In this study, a composite material of iron sulfide and biochar (FeS@BC) was synthesized using physical ball milling and applied for the oxidative removal of tetracycline in the presence of persulfate. The FeS@BC showed promising efficiency in degrading tetracycline, with biochar playing a facilitating role in the system.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Mechanochemically synthesized S-ZVIbm composites for the activation of persulfate in the pH-independent degradation of atrazine: Effects of sulfur dose and ball-milling conditions

Shanshan Deng et al.

Summary: Mechanochemically sulfidated ZVI (S-ZVI(bm)) shows significantly enhanced activation of persulfate (PS) in degrading refractory contaminants. The optimal performance was achieved with S-ZVIbm synthesized with 25% sulfur at 300 rev min(-1) for 5 hours. The primary facilitation mechanisms of S-ZVI(bm) include mitigating passivation, increasing hydrophobicity, enhancing electron transfer, and accelerating Fe2+ regeneration to efficiently activate PS.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

The action of enhanced reactive oxygen species production through the dopant of Al2O3/GO in piezoelectric ZnO

Chunxiang Wan et al.

Summary: The study successfully prepared a novel composite material ZnO-Al2O3/GO with excellent piezocatalytic and antibacterial abilities, capable of degrading RhB solution and inhibiting the growth of Bacillus. By doping Zn ions and Al atoms, the material exhibited increased stability, conductivity, and enhanced catalytic efficiency of ZnO.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

Article Chemistry, Physical

g-C3N4 nanosheets exfoliated by green wet ball milling process for photodegradation of organic pollutants

Zixuan Ma et al.

Summary: Ultra-thin and easily dispersible g-C3N4 nanosheets were obtained via a simple wet ball-milling process, leading to improved dispersion stability and photocatalytic capacity. The study demonstrated the feasibility of using g-C3N4 nanosheets for photodegradation of aqueous organic contaminants through experiments with polluted water sampled from Jingyue Lake in Donghua University.

CHEMICAL PHYSICS LETTERS (2021)

Article Engineering, Environmental

Single-Atom Fe Catalyst Outperforms Its Homogeneous Counterpart for Activating Peroxymonosulfate to Achieve Effective Degradation of Organic Contaminants

Kun Qian et al.

Summary: In this study, FeN4 structures were constructed on carbon nanotubes to obtain single-atom catalysts, which successfully generated reactive iron species (RFeS) for the selective degradation of emerging organic contaminants (EOCs) over a wide pH range. The results revealed the mechanism of RFeS generation and the important role of carbon nanotubes in enhancing the reactivity of FeN4=O intermediates.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Review Engineering, Environmental

Heterogeneous Fenton catalysts: A review of recent advances

Nishanth Thomas et al.

Summary: 1. Heterogeneous Fenton catalysts show excellent performance in water purification applications. 2. Increasing complexity in cell wall leads to higher resistance of microorganisms towards disinfectants. 3. Introduction of plasmonic materials can enhance the visible light absorption efficiency of the hybrid Fenton catalysts.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

ZnO/biochar nanocomposites via solvent free ball milling for enhanced adsorption and photocatalytic degradation of methylene blue

Fang Yu et al.

Summary: Novel ZnO/biochar nanocomposites were successfully synthesized in this study using a facile ball-milling method. The ball milling process increased the mesopores and macropores of the nanocomposites, enhancing their adsorption capacity and photocatalytic ability for the removal of methylene blue. The nanocomposites showed high efficiency (up to 95.19%) in removing methylene blue from organic dye wastewater through a combination of adsorption and photocatalysis under visible light.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Materials Science, Multidisciplinary

Improving the catalytic activity of bentonite-based bismuth ferrites composite via mechanical activation for photo-Fenton process

Guangtao Wei et al.

Summary: The study focused on activating BiFe/Bent composite through mechanical activation, leading to improved catalytic activity and changes in physicochemical properties. The main reasons for enhanced catalytic activity of the activated composite were attributed to changes in microstructure. Mechanical activation was identified as a strategy to promote catalytic efficiency of the composite material.

MATERIALS CHEMISTRY AND PHYSICS (2021)

Article Engineering, Environmental

Accurate design of hollow/tubular porous g-C3N4 from melamine-cyanuric acid supramolecular prepared with mechanochemical method

Hongyun Niu et al.

Summary: The melamine-cyanuric acid (MA-CA) supramolecular is considered an ideal starting material for preparing tubular or hollow g-C3N4, with diverse morphologies being achieved depending on preparation conditions. Using a mechanochemical technique, g-C3N4 samples with hollow nanorods, nanotubes, and porous nanosheets shapes were obtained, showing varied photocatalytic performance. The differences in photocatalytic activity are attributed to factors such as surface area and photogenerated carrier separation ability.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

Facile synthesis of highly efficient and cost-effective photo-Fenton catalyst by ball milling commercial TiO2 and natural magnetite

Qi Jiang et al.

Summary: The study prepared TiO2/Mag composites via ball milling, showing high photo-Fenton catalytic activity and promising practical application in water treatment with various merits.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Engineering, Environmental

Oxygen vacancy-mediated sandwich-structural TiO2-x/ultrathin g-C3N4/TiO2-x direct Z-scheme heterojunction visible-light-driven photocatalyst for efficient removal of high toxic tetracycline antibiotics

Jiaxin Ni et al.

Summary: A surface defect sandwich-structural TiO2-x/ultrathin g-C3N4/TiO2-x direct Z-scheme heterojunction photocatalyst was successfully constructed, showing efficient removal of high toxic tetracycline hydrochloride from wastewater. Its special 3D structure, Z-scheme heterojunction facilitate charge transfer and active species generation, while oxygen vacancies enhance spatial separation of photo-induced carriers.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Physical

Photocatalysis-activated SR-AOP over PDINH/MIL-88A(Fe) composites for boosted chloroquine phosphate degradation: Performance, mechanism, pathway and DFT calculations

Xiao-Hong Yi et al.

Summary: PDINH/MIL-88A(Fe) composites were fabricated using a facile ball-milling strategy, showing outstanding degradation performance towards CQ under low power LED visible light. The activation of PDS over P25M175 and pristine MIL-88A contributed to boosted CQ degradation efficiency through direct and indirect electron transfer. Active radicals and singlet oxygen were found to participate in the CQ decomposition, with proposed degradation pathways and toxicity evaluations of intermediates.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Carbon zero-valent iron materials possessing high-content fine Fe0 nanoparticles with enhanced microelectrolysis-Fenton-like catalytic performance for water purification

Hongzhou Lv et al.

Summary: Fe@C composites derived from different starting materials exhibit varying catalytic activity and stability in wastewater treatment. Fe@C derived from Fe-ATA shows good activity and reusability in Fenton-like reaction.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Engineering, Environmental

Facile ball-milling synthesis of CeO2/g-C3N4 Z-scheme heterojunction for synergistic adsorption and photodegradation of methylene blue: Characteristics, kinetics, models, and mechanisms

Xiaoqian Wei et al.

Summary: In this study, novel Z-scheme heterojunction CeO2/g-C3N4 nanocomposites were synthesized by ball milling, showing enhanced photocatalytic activity in comparison to individual CeO2 and g-C3N4. The synergistic interaction between adsorption and photodegradation was investigated, revealing a strong positive correlation and providing insights into the synergy between the two processes. This work not only offers a facile synthesis method for Z-scheme heterojunction photocatalysts, but also a new perspective for better understanding their combined effects.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Electron transfer enhancing Fe(II)/Fe(III) cycle by sulfur and biochar in magnetic FeS@biochar to active peroxymonosulfate for 2,4-dichlorophenoxyacetic acid degradation

Qiaofeng Hong et al.

Summary: A highly active mediator (MFB) based on FeS@biochar was prepared for peroxymonosulfate (PMS) activation, showing excellent performance in degrading 2,4-D pesticides with enhanced lifetime. The optimized reaction parameters were determined, and a novel kinetics model was proposed for describing the interfacial adsorption and catalytic reaction process accurately. The study also highlighted the inhibitory effects of pH and coexisting anions on 2,4-D degradation, providing a promising approach for designing high-performance mediators in environmental remediation.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Environmental Sciences

A novel CNTs-Fe3O4 synthetized via a ball-milling strategy as efficient fenton-like catalyst for degradation of sulfonamides

Yunbo Liu et al.

Summary: A novel composite (CNTs-Fe3O4) was synthesized and characterized for the removal of six sulfonamides through Fenton degradation. The study systematically investigated the degradation behaviors and molecular structures of the sulfonamides. The results showed that the as-fabricated CNTs-Fe3O4 had excellent Fenton catalytic activity and a quantitative relationship between the Mulliken charge of sulfonamides and their degradation rate constant was established.

CHEMOSPHERE (2021)

Review Engineering, Environmental

Recent advances in single-atom catalysts for advanced oxidation processes in water purification

Bingkun Huang et al.

Summary: This review summarizes the emerging synthetic and characterization strategies of Single-atom catalysts (SACs) and analyzes their development tendency in the environmental field and advanced oxidation processes (AOPs). The advantages of SACs in generating reactive oxygen species and constructive opinions for their stability and activity are discussed. Lastly, the opportunities and challenges faced by SACs and its future development direction in the AOPs catalytic field are proposed.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Chemistry, Physical

In situ chemical oxidation: peroxide or persulfate coupled with membrane technology for wastewater treatment

Huchuan Yan et al.

Summary: Refractory organic pollutants in wastewater pose serious threats to human and environmental health. The coupling of membrane technology with persulfate/peroxide-based in situ chemical oxidation (ISCO) overcomes the limitations of single technologies and achieves complementary advantages in pollutant filtration and degradation. Different membrane materials and types can be utilized in coupling processes, including one-pot coupling and two-stage coupling.

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Yao Xiao et al.

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BIORESOURCE TECHNOLOGY (2020)

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