4.7 Article

Designing hierarchically porous zero-valent iron via 3D printing to degrade organic pollutants by activating peroxymonosulfate using high-valent iron-oxo species

Related references

Note: Only part of the references are listed.
Article Engineering, Chemical

3D printed hierarchically porous zero-valent copper for efficient pollutant degradation through peroxymonosulfate activation

Sheng Guo et al.

Summary: This study demonstrates the potential of 3D printing in wastewater purification through the preparation of a hierarchically porous copper material. The 3D-ZVC/PMS/Vis system exhibits excellent catalytic performance in degrading organic pollutants and achieves a high degradation efficiency of tetracycline. It also shows broad pH resistance, adaptability, stability, and reusability. The degradation process involves electrons and various reactive oxygen species, with O-1(2) playing a dominant role, and the toxicity of degradation products is significantly reduced.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

Article Engineering, Environmental

Different reaction mechanisms of SO4•-and •OH with organic compound interpreted at molecular orbital level in Co(II)/peroxymonosulfate catalytic activation system

Huixuan Zhang et al.

Summary: Hydroxyl radical (center dot OH) and sulfate radical (SO4 center dot-) have been widely studied in advanced oxidation processes (AOPs) for organic pollutants degradation. In this study, a Co(II)/peroxymonosulfate activation system was established to degrade caffeine (CAF), and the different attack routes of SO4 center dot- and center dot OH were explored. It was found that SO4 center dot- is more likely to attack CAF kinetically, while only center dot OH can react via hydrogen atom abstraction (HAA) route. Radical adduct formation (RAF) is the most favorable route for both center dot OH and SO4 center dot- attack. These findings provide insights into the degradation mechanism of organic pollutants in AOPs driven by center dot OH and SO4 center dot-.

WATER RESEARCH (2023)

Article Chemistry, Physical

Ni-Pd-Incorporated Fe3O4 Yolk-Shelled Nanospheres as Efficient Magnetically Recyclable Catalysts for Reduction of N-Containing Unsaturated Compounds

Dong Wang et al.

Summary: This study reports the synthesis of Ni-Pd/Fe3O4 composite nanospheres by incorporating heterometals into Fe3O4 shell and yolk, which exhibit excellent treatment efficiency and capability for the degradation of N-containing organic dyes. The as-prepared composite shows enhanced catalytic activity and recyclability compared to its mono metal counterparts. In addition, it demonstrates superior catalytic activity in the reduction of 4-nitrophenol. This work provides a new strategy to enhance the activity of iron oxide-based catalytic materials and contributes to environmental catalysis research.

CATALYSTS (2023)

Article Engineering, Environmental

Copper Nanowire Networks: An Effective Electrochemical Peroxymonosulfate Activator toward Nitrogenous Pollutant Abatement

Wentian Zheng et al.

Summary: Electrified copper nanowire filters can effectively, rapidly, and robustly remove various nitrogenous pollutants from water via PMS activation. A novel electrochemical filtration system was developed, employing highly conductive and porous copper nanowire networks as catalyst, electrode, and filtration media to selectively abate nitrogenous organic pollutants. The study combines theoretical calculations and experimental results to propose a mechanism for pollution abatement with CuNW networks, showing that the system efficacy is robust across a broad range of solution pH and complex aqueous matrices. The flow-through operation of CuNW filters outperforms conventional batch electrochemistry, offering a new strategy for environmental remediation.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2023)

Article Chemistry, Physical

Ultrafast degradation of emerging organic pollutants via activation of peroxymonosulfate over Fe3C/Fe@N-C-x: Singlet oxygen evolution and electron-transfer mechanisms

Chen Zhao et al.

Summary: Fe3C/Fe@N-C-9 materials were successfully fabricated via one-pot calcination using a green precursor. The materials exhibited excellent activation of PMS for fast removal of emerging organic contaminants with high mineralization capacities. The nanotube morphology and encapsulation of FNPs allowed for trace Fe leaching and easy magnetic separation for recycling. Singlet oxygen and electron-transfer were identified as the main mechanisms for organic pollutant removal.

APPLIED CATALYSIS B-ENVIRONMENTAL (2023)

Article Engineering, Environmental

NaOH-modified biochar supported Fe/Mn bimetallic composites as efficient peroxymonosulfate activator for enhance tetracycline removal

Fawen Liang et al.

Summary: In this study, a NaOH-modified biochar supported Fe/Mn bimetallic composite (Fe-Mn/AW-BC) was prepared to remove tetracycline (TC) through activating peroxymonosulfate (PMS). The results showed that Fe-Mn/AW-BC + PMS system had a rate constant 37 times higher than the BC + PMS system, with about 97.9% of TC degraded. The Fe-Mn/AW-BC system exhibited wide pH usability and broad-spectrum adaptability towards various organic pollutants and water environments.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Engineering, Environmental

Rapid electron transfer-promoted tetracycline hydrochloride degradation: Enhanced activity in visible light-coupled peroxymonosulfate with PdO/g-C3N4/kaolinite catalyst

Zhou Cao et al.

Summary: A novel highly dispersed PdO/g-C3N4/kaolinite (P/CNK) composite was synthesized for the efficient degradation of tetracycline hydrochloride (TCH) using peroxymonosulfate (PMS) under visible light. The 4% P/CNK catalyst exhibited excellent catalytic ability for TCH degradation (94.5%) within 20 minutes. The composite's favorable specific surface area and pore volume allowed for the high dispersion of PdO and the adsorption of PMS, while the presence of kaolinite enhanced the self-decomposition of PMS. The system also demonstrated good degradation efficiency under different pH conditions and maintained its catalytic activity after five cycles.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Chemistry, Multidisciplinary

A General Strategy to Synthesize Fluidic Single Atom Electrodes for Selective Reactive Oxygen Species Production

Limin Jin et al.

Summary: Fine-tuning the geometric and electronic structure of catalytic metal centers via N-coordination engineering allows for the selective electrocatalytic activation of O-2 to O-1(2). Through a coordination modulation strategy, fluidic single-atom electrodes are synthesized, achieving >98% selectivity towards O-1(2) generation. The use of end-on adsorption of O-2 onto Cr-N-4 sites lowers the activation energy barrier, promoting the breakage of Cr-OOH bonds and the formation of (OOH)-O-center dot intermediates. The flow-through configuration of the fluidic electrode enhances mass transport and charge transfer, resulting in improved performance compared to batch reactors.

ACS NANO (2023)

Review Engineering, Environmental

Aqueous Iron(IV)-Oxo Complex: An Emerging Powerful Reactive Oxidant Formed by Iron(II)-Based Advanced Oxidation Processes for Oxidative Water Treatment

Zhen Wang et al.

Summary: High-valent iron(IV)-oxo complexes play a significant role as reactive intermediates in various chemical and biological systems. Among them, the aqueous iron(IV)-oxo complex ((FeaqO2+)-O-IV) is the simplest but also the most powerful ferryl ion species, showing high reactivity and selectivity in oxidizing water treatment. This review provides a comprehensive understanding of the chemical properties, oxidation mechanisms, and kinetics of (FeaqO2+)-O-IV, with comparisons to other free radicals. Additionally, the potential role of (FeaqO2+)-O-IV in Fe-aq(2+)-based advanced oxidation processes (AOPs) is discussed, challenging the conventional view that free radicals dominate these AOPs.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Engineering, Environmental

N, S co-doped magnetic mesoporous carbon nanosheets for activating peroxymonosulfate to rapidly degrade tetracycline: Synergistic effect and mechanism

Dongdong He et al.

Summary: A novel N, S co-doped magnetic mesoporous carbon nanosheets were prepared in this study, demonstrating high degradation efficiency for tetracycline within 10 minutes due to non-radical pathway, with pyridinic N as the main active site.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Engineering, Environmental

Insights into the mechanism of enhanced peroxymonosulfate degraded tetracycline using metal organic framework derived carbonyl modified carbon-coated Fe0

Yiqiong Yang et al.

Summary: Tetracycline (TC) degradation in water was successfully achieved using carbonyl-modified carbon-coated Fe0 as an activator for peroxymonosulfate (PMS). The Fe0 continuously activated PMS, while carbon facilitated electron transportation and the carbonyl group on the carbon surface acted as the active site. This study demonstrates the promising potential of this novel material for removing antibiotics from water.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Engineering, Environmental

Role of sulfide-modified nanoscale zero-valent iron on carbon nanotubes in nonradical activation of peroxydisulfate

Libin Wu et al.

Summary: In this study, sulfide-modified nanoscale zero-valent iron on carbon nanotubes was prepared for the degradation of sulfamethoxazole. Singlet oxygen was identified as the main active species, and sulfur doping transitioned the activation pathway to a nonradical pathway. Different transformation pathways were proposed for the degradation of sulfamethoxazole in the S-nZVI@CNTs/PDS system, highlighting its potential as a sustainable and effective treatment for antibiotic wastewater.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Environmental Sciences

High efficiency degradation of tetracycline by peroxymonosulfate activated with Fe/NC catalysts: Performance, intermediates, stability and mechanism

Xiaoming Peng et al.

Summary: Fe/CN-30 catalyst efficiently degrades tetracycline across a wide pH range, with non-radical pathways dominating the decomposition process. The coordination sites of Fe and N in Fe/CN-30 serve as the reactive centers for tetracycline degradation. The study provides new insights into non-radical pathway-catalyzed advanced oxidation processes.

ENVIRONMENTAL RESEARCH (2022)

Article Chemistry, Physical

Construct α-Fe2O3/rGO/PS composite structure for promoted spatial charge separation and exceptional catalytic activity in visible-light-driven photocatalysis-persulfate activation coupling system

Shuai Wang et al.

Summary: In this study, alpha-Fe2O3/rGO was synthesized using a one-step method and used to activate persulfate for the degradation of Bisphenol A under sunlight. The results showed that the introduction of alpha-Fe2O3/rGO and persulfate significantly enhanced the photocatalytic efficiency, resulting in a degradation rate of 99.1%. Electron spin resonance spectroscopy and trapping experiments identified ·OH and ·SO42- as the principal oxidative species in the reaction system.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

Article Engineering, Chemical

Fabrication of sulfide nanoscale zero-valent iron and heterogeneous Fenton-like degradation of 2,4-Dichlorophenol

Hongwei Pang et al.

Summary: The research investigates the surface sulfidation impact on the modification of NZVI materials and the mechanism and efficiency of organic matter degradation by Sulfide NZVI. The results show that sulfidation treatment significantly enhances the stability and functionality of the material, resulting in higher degradation efficiency and pollutant removal capacity, which is beneficial for environmental governance.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Article Engineering, Environmental

Reducing agents enhanced Fenton-like oxidation (Fe(III)/Peroxydisulfate): Substrate specific reactivity of reactive oxygen species

Shuang Meng et al.

Summary: This study investigates the substrate specific reactivity of reactive oxygen species (ROS) in Fe(III)/PDS systems enhanced by different reducing agents (RAs). The results indicate that RAs significantly enhance the Fe(III)/Fe(II) cycles to produce •OH, SO4•-, and Fe(IV). The different yields of the oxidation product suggest that the distribution of multiple oxidizing species changes with various factors. This work provides possibilities for adjusting the oxidation selectivity in RAs/Fe(III)/PDS systems and offers insights into the application of RAs in environmental remediation.

WATER RESEARCH (2022)

Article Chemistry, Multidisciplinary

Generating High-valent Iron-oxo ≡FeIV=O Complexes in Neutral Microenvironments through Peroxymonosulfate Activation by Zn-Fe Layered Double Hydroxides

Yan Bao et al.

Summary: In this study, we propose the construction of a neutral microenvironment on the surface of Zn-Fe layered double hydroxide for activating PMS. By utilizing the amphoteric properties of zinc hydroxide, equivalent to Fe-IV=O can be continuously generated over a wide pH range. The neutral microenvironment mitigates the self-decomposition of Fe-IV=O and the hydrolysis reaction of iron, resulting in stable and efficient treatment of wastewater.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Physical

Sustainable Fe(III)/Fe(II) cycles triggered by co-catalyst of weak electrical current in Fe(III)/peroxymonosulfate system: Collaboration of radical and non-radical mechanisms

Xianhu Long et al.

Summary: In this study, an electrochemical system was used as a co-catalyst to enhance the activation of peroxymonosulfate for efficient degradation of Sulfamethoxazole. The collaboration of radicals and non-radicals oxidation was found to be responsible for the degradation, with singlet oxygen and Fe(IV) surprisingly involved in the system. The relative contributions of various reactive oxygen species were calculated, and multiple degradation pathways for Sulfamethoxazole were proposed.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Engineering, Environmental

Efficient catalytic degradation of bisphenol A coordinated with peroxymonosulfate via anchoring monodispersed zero-valent iron on natural kaolinite

Chunquan Li et al.

Summary: Nano-zero valent iron/kaolinite composite was successfully prepared and demonstrated excellent peroxymonosulfate activation and bisphenol A degradation properties. Weak acid and neutral environment were more advantageous to the degradation, while anions were adverse. Possible degradation pathways were inferred based on experimental results.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Mechanistic Insights into the Markedly Decreased Oxidation Capacity of the Fe(II)/S2O82- Process with Increasing pH

Dandan Rao et al.

Summary: This study systematically evaluated the effect of pH on the oxidation capacity of the Fe(II)/S2O82- [Fe(II)/PDS] system and developed a mathematical model to quantify these effects. The results showed that the performance of the Fe(II)/PDS process declined significantly at pH > 3.0 due to the decrease in Fe(IV) contribution with increasing pH.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Physical

Boosted tetracycline and Cr(VI) simultaneous cleanup over Z-Scheme BiPO4/CuBi2O4 p-n heterojunction with 0D/1D trepang-like structure under simulated sunlight irradiation

Changyu Lu et al.

Summary: In this study, BiPO4/CuBi2O4 heterojunctions were synthesized via hydrothermal method and exhibited outstanding photocatalytic performance for the simultaneous degradation of tetracycline and reduction of hexavalent chromium under simulated sunlight. The heterojunctions showed high removal efficiency of 92.0% for tetracycline and 60.3% for hexavalent chromium, which were much higher than those achieved with BiPO4 and CuBi2O4 individually. The unique trepang-like structure and built-in electric field in the heterojunctions contributed to the enhanced photocatalytic properties.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

Article Chemistry, Physical

Identifying the role of oxygen vacancy on cobalt-based perovskites towards peroxymonosulfate activation for efficient iohexol degradation

Zhe Xu et al.

Summary: In this study, a VO-tuned cobalt-based perovskite material was constructed and showed superior activity in the degradation of organic pollutants in water. The role of VO was found to include adjusting adsorption configuration, increasing charge density of the depletion layer, and reducing transfer resistance. These findings are important for achieving efficient degradation of organic pollutants.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Review Engineering, Environmental

Promoted generation strategies and corresponding roles of singlet oxygen in activation of persulfate by nanoscale zero-valent iron systems

Danlian Huang et al.

Summary: This review systematically summarizes the strategies for promoting the generation of singlet oxygen (O-1(2)) in nanoscale zero-valent iron (nZVI) persulfate activation and the corresponding roles of O-1(2) in degrading pollutants, providing a new perspective for dealing with water pollution.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Facet-Dependent Activation of Oxalic Acid over Magnetic Recyclable Fe3S4 for Efficient Pollutant Removal under Visible Light Irradiation: Enhanced Catalytic Activity, DFT Calculations, and Mechanism Insight

Zhixiong Yang et al.

Summary: In this study, a magnetic recyclable greigite material (Fe3S4) with the exposed {011} facet was successfully prepared using a facile hydrothermal method. The activated oxalic acid (OA) under visible light irradiation showed promising potential for fast degradation of pollutants. The removal efficiency of metronidazole (MNZ) and hexavalent chromium using the Fe3S4 material with the exposed {011} facet was significantly higher compared to that of the material with the exposed {112} facet. Theoretical calculations and analyses provided insights into the mechanism of enhanced OA activation by facet engineering and the degradation mechanism of MNZ.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Environmental Sciences

Efficient Single-Atom Fe-Catalyzed Fenton-like Reaction Involving Peroxymonosulfate for BPA Degradation by High-Valent Fe(IV)=O

Jiahao Cui et al.

Summary: Catalytic activation of peroxymonosulfate is a promising method for water treatment. The study demonstrates that a single-atom Fe catalyst, anchored on a nitrogen-doped carbon matrix, is efficient in selectively degrading various organic pollutants. The high-valent iron-oxo species play a crucial role in the degradation process.

ACS ES&T WATER (2022)

Article Environmental Sciences

Carbonized MOF-Coated Zero-Valent Cu Driving an Efficient Dual-Reaction-Center Fenton-like Water Treatment Process through Utilizing Pollutants and Natural Dissolved Oxygen

Kanglan Deng et al.

Summary: An innovative strategy utilizing organic pollutants and dissolved oxygen in wastewater has been developed to degrade refractory organic pollutants effectively and rapidly. The newly developed catalyst showed excellent stability and wide adaptability.

ACS ES&T WATER (2022)

Article Environmental Sciences

Photocatalytic Degradation of Polycyclic Aromatic Hydrocarbons in Water by 3D Printed TiO2 Composites

Andrew D. McQueen et al.

Summary: Recent progress has shown the potential of using photocatalyst-polymer composites for wastewater treatment. Researchers successfully used 3D printing technology to create TiO2 composites and degrade polycyclic aromatic hydrocarbons (PAHs) in contaminated sediment. The photocatalytic structures achieved rapid degradation of PAHs within hours to days and eliminated toxicity to aquatic organisms.

ACS ES&T WATER (2022)

Article Chemistry, Physical

Boosted tetracycline and Cr(VI) simultaneous cleanup over Z-Scheme BiPO4/CuBi2O4 p-n heterojunction with 0D/1D trepang-like structure under simulated sunlight irradiation

Changyu Lu et al.

Summary: In this study, BiPO4/CuBi2O4 (BPO-CBO) heterojunctions with a unique trepang-like structure were prepared via hydrothermal method. The heterojunction exhibited excellent removal efficiency for tetracycline (TC) and Cr(VI), as well as remarkable recyclability and enhanced photocatalytic properties. The enhanced performance was attributed to the unique structure, built-in electric field, and Z-Scheme pathways for promoting carrier separation.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

Article Nanoscience & Nanotechnology

3D Printing and Chemical Dealloying of a Hierarchically Micro- and Nanoporous Catalyst for Wastewater Purification

Chao Cai et al.

Summary: Hierarchically porous-structured materials have great potential for catalytic applications. In this study, a novel NPC@DCS catalyst was synthesized using 3D printing and chemical dealloying. The catalyst showed remarkable degradation efficiency for organic wastewater treatment and demonstrated stability, durability, mineralization capability, and versatility.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Physical

Activation of peroxymonosulfate via mediated electron transfer mechanism on single-atom Fe catalyst for effective organic pollutants removal

Pijun Duan et al.

Summary: The study fabricated atomically dispersed Fe on g-C3N4 for peroxymonosulfate activation to efficiently degrade o-phenylphenol. The results showed that mediated electron transfer was identified as the dominated mechanism, providing new possibilities for implementing non-radical dominated process at the device level.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Materials Science, Multidisciplinary

Enhanced photocatalytic degradation of organic contaminants over CaFe2O4 under visible LED light irradiation mediated by peroxymonosulfate

Sheng Guo et al.

Summary: A simple sol-gel method was used to fabricate CaFe2O4 for efficient degradation of various organic pollutants under LED light irradiation mediated by peroxymonosulfate (PMS). Results showed that CaFe2O4-800 exhibited the best efficiency in degrading RhB, attributed to efficient charge separation and high carrier concentration. The photocatalyst also demonstrated stable performance and excellent degradation efficiency under natural conditions, indicating its potential as an environmentally friendly photocatalyst for PMS activation.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Degradation of Organic Contaminants in the Fe(II)/Peroxymonosulfate Process under Acidic Conditions: The Overlooked Rapid Oxidation Stage

Hongyu Dong et al.

Summary: This study investigated the kinetics and mechanisms of organic contaminants degradation in the iron(II)-activated peroxymonosulfate process under acidic conditions. It found that organic contaminants were rapidly oxidized in the rapid oxidation stage with different oxidants contributing to degradation, while in the slow oxidation stage, degradation was slower and less oxidants were generated.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Nanoscience & Nanotechnology

Three-Dimensional Hierarchical Porous Structures of Metallic Glass/Copper Composite Catalysts by 3D Printing for Efficient Wastewater Treatments

Chong Yang et al.

Summary: The study introduces a novel strategy to design efficient and reusable catalysts by incorporating Cu into a metallic glass-based catalyst and constructing three-dimensional hierarchical porous structures through laser 3D printing. The resulting catalysts show outstanding catalytic efficiency and exceptional reusability in degrading dyes.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Engineering, Environmental

Nanoscale zero-valent iron/cobalt@mesoporous hydrated silica core-shell particles as a highly active heterogeneous Fenton catalyst for the degradation of tetrabromobisphenol A

Minghui Xiang et al.

Summary: In this study, novel nanoscale zero-valent iron/cobalt@mesoporous hydrated silica core-shell particles were synthesized for the rapid degradation of Tetrabromobisphenol A. By optimizing the catalyst ratio and reaction conditions, the particles exhibited excellent reactivity and mineralization activity for TBBPA removal.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Environmental Sciences

Understanding of the mechanism of extracellular polymeric substances of aerobic granular sludge against tetracycline from the perspective of fluorescence properties

Zhengwen Li et al.

Summary: This study investigated the resistance mechanism of AGS-EPS against tetracycline, showing that tetracycline interacted with proteins and humic acid in AGS-EPS by forming stable complexes. Components with larger molecular weight in AGS-EPS interacted with tetracycline prior to those with smaller molecular weight, and tetracycline had the potential to bind with divalent cations in AGS-EPS, causing conformation changes of proteins.

SCIENCE OF THE TOTAL ENVIRONMENT (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 Environmental Sciences

Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe2O3 composites for advanced oxidation of organic pollutants

Sheng Guo et al.

Summary: Oxygen vacancy engineering is an effective approach to improve catalyst performance for peroxymonosulfate (PMS) activation. Here, a cost-effective and environmentally friendly magnesium-doped hematite (Mg/Fe2O3) composite was synthesized, showing enhanced Rhodamine B degradation through PMS activation. The catalyst exhibited wide pH working range, high stability, and recyclability, with O-1(2) and O•(2)- identified as the predominant reactive species in RhB degradation.

CHEMOSPHERE (2021)

Article Engineering, Environmental

Persulfate Oxidation of Sulfamethoxazole by Magnetic Iron-Char Composites via Nonradical Pathways: Fe(IV) Versus Surface-Mediated Electron Transfer

Jun Liang et al.

Summary: This study developed two efficient magnetic iron-char composites and investigated the efficacy of nonradical pathways for PS activation in degrading SMX. The BCFe-400/PS system showed high stability and efficiency in continuous degradation of SMX, while the BCFe-700/PS system displayed recovered reactivity after thermal treatment. Both systems exhibited high performances for SMX removal in various water matrices, highlighting the great merits of nonradical activation methods.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Unraveling the High-Activity Origin of Single-Atom Iron Catalysts for Organic Pollutant Oxidation via Peroxymonosulfate Activation

Yaowen Gao et al.

Summary: Single-atom iron catalyst prepared via a cascade anchoring method exhibits exceptional catalytic activity in peroxymonosulfate (PMS) conversion for organic pollutant oxidation, with the high-activity origin attributed to the Fe-pyridinic N-4 moiety that significantly increases active sites for PMS activation.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Identifying the Persistent Free Radicals (PFRs) Formed as Crucial Metastable Intermediates during Peroxymonosulfate (PMS) Activation by N-Doped Carbonaceous Materials

Yufei Zhen et al.

Summary: This study reveals the nonradical mechanism involved in peroxymonosulfate activation in carbonaceous materials and the formation of crucial intermediates, providing insights into the efficiency and activation energy of NHCS/PMS system for organic degradation. Persistent free radicals play a significant role in organic degradation, and their formation relies on the attack of surface-bonded radicals in PMS. The evolution of persistent free radicals from oxygen-centered to carbon-centered radicals is triggered by the degradation intermediates of aromatic compounds.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Facile Synthesis of AgFeO2-Decorated CaCO3 with Enhanced Catalytic Activity in Activation of Peroxymonosulfate for Efficient Degradation of Organic Pollutants

Sheng Guo et al.

Summary: This study presents a self-assembly strategy to stabilize AgFeO2 on the surface of CaCO3 (AgFeO2@CaCO3), demonstrating excellent catalytic performance, stability, and degradation efficiency towards various organic pollutants.

ADVANCED ENERGY AND SUSTAINABILITY RESEARCH (2021)

Article Environmental Sciences

Additive Manufacturing for Contaminants: Ammonia Removal Using 3D Printed Polymer-Zeolite Composites

Alan J. Kennedy et al.

Summary: This research utilizes additive manufacturing to rapidly prototype functional composite structures for effective removal of ammonia contamination in water. Customizable devices can be deployed and retrieved quickly using 3D printing technology. By 3D printing zeolite and polylactic acid composites, effective removal of ammonia in water is achieved, comparable to free zeolite.

ACS ES&T WATER (2021)

Article Chemistry, Multidisciplinary

3D Printed Mechanically Robust Graphene/CNT Electrodes for Highly Efficient Overall Water Splitting

Peng Meiwen et al.

ADVANCED MATERIALS (2020)

Article Engineering, Environmental

Is Sulfate Radical Really Generated from Peroxydisulfate Activated by Iron(II) for Environmental Decontamination?

Zhen Wang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2018)

Article Chemistry, Multidisciplinary

Three-dimensional Printing for Catalytic Applications: Current Status and Perspectives

Xintong Zhou et al.

ADVANCED FUNCTIONAL MATERIALS (2017)

Article Engineering, Environmental

Radical generation by the interaction of transition metals with common oxidants

GP Anipsitakis et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2004)