JOURNAL OF FOOD ENGINEERING
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2025
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IF 5.8
Sihang Li,Xun Zhou,Jiahao Cui,Xingjian Zou,Zijian Li,Wirote Youravong,Ming Li,Haihua Wang,Zhenyu Li
Residual Alicyclobacillus acidoterrestris severely impacts juice quality. Conventional thermal treatments fail to completely eliminate bacteria and simultaneously cause the loss of heat-sensitive components. Ultrafiltration (UF) has been a nonthermal alternative to conventional thermal process for the sterilization of apple juice. However, membrane fouling, particularly biofouling is an obstacle for deployment of UF in food processing. In order to tackle the challenging issue of membrane biofouling while ensuring food safety, functionalized UF membrane was developed by multi-stage modifications including metal chelator coating and chlorogenic acid-encapsulated MIL-53(Fe) microparticle grafting. The engineered membrane was applied for cold sterilization of apple juice to remove Alicyclobacillus acidoterrestris . Results showed that (i) the engineered membrane could release chlorogenic acid in response to pH stimulation, (ii) the steady state flux of engineered membrane was maintained higher than the pristine membrane after filtration with contaminated apple juice. Only 4.9% viable bacteria were observed on the membrane surface, (iii) the antibacterial mechanism of engineered membrane was mainly due to the disruption of cellular structural integrity and enhanced permeability of cell membranes, which caused the damage to A. acidoterrestris cell, (iv) after filtration, the Fe 3+ concentration in the permeate solution was almost undetectable. The engineered membrane can simultaneously exclude and inactivate A. acidoterrestris in apple juice, while demonstrating excellent anti-adhesion and anti-biofouling properties. Furthermore, the engineered membrane complies with food safety requirements, which verifies that this metal-organic framework modification method has the potential for practical application in food processing.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Long Chen,Zhiqing Liu,Youpeng Xiong,Shiyu Liu,Rui Li,Chao Huang,Xinghuan Liu,Xin Jia
Developing single-atom nanozymes (SAzymes) with neighboring metal atom active centers composed of homogeneous metal atoms and precisely regulating the distance of atom pair is still purposeful but challenging. Herein, we report an atomic-scale inter-site distance engineering for rationally designing Fe-SAzymes by regulating the inter-site distance of Fe active centers. The resulting Fe-SAzymes displayed enhanced and tunable peroxidase-like activity and Michaelis-Menten kinetics. Among FeN 4 -SAzyme, Fe 2 N 8 -SAzyme, Fe 2 N 7 -SAzyme and Fe 2 N 6 -SAzyme configurations, the Fe 2 N 7 -SAzyme demonstrates exceptional specific activity (24.72 U mg −1 ). Meanwhile, the density functional theory (DFT) calculations revealed that Fe 2 N 7 -SAzyme exhibited a higher performance of peroxidase-like catalytic activity than Fe 2 N 6 -SAzyme attributed to the strong electron donor ability the neighboring Fe active atom and approaching Fermi level of electronic structure. Furthermore, the resultant Fe 2 N 7 -SAzyme is capable of pesticide detection under low concentrations (2–10 mg L −1 ), which reached the limit of detection to 0.72 mg L −1 of malathion molecules. This work contributes to the rational design and regulation strategy for enhancing the peroxidase-like catalytic activity of SAzymes via atomic-scale inter-site distance engineering.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Mingjing Ma,Huanhuan Yu,Baolin Zhu,Wenjun Zheng,Shoumin Zhang
The design of efficient catalysts with atom clusters (ACs) and single atoms (SAs) as active sites for water splitting presents an effective approach for improving bifunctional electrocatalytic performance by synergistically promoting electron transport and proton transfer kinetics. In this work, a series of Fe2O3-supported noble metal catalysts (M = Ru, Rh, Pd, Ag) incorporating both ACs and SAs sites were developed, with detailed characterization identifying Ru ACs as the primary active centers. The designed-interfacial M-O-Fe bonds play a critical role in charge redistribution, subsequently enhancing electron and proton transfer kinetics. The resulting heterostructure optimizes both the electronic environment and active site accessibility, yielding exceptional electrocatalytic performance. Further density functional theory calculations demonstrate that the incorporation of Ru species leads to increased filling of antibonding orbitals and modulation of the d-band center, subsequently reducing the energy barrier of the rate-determining steps to −0.267 eV for HER and 1.522 eV for OER, respectively. Consequently, the representative Ru/Fe2O3 with Ru content of 1.1 wt.% achieves an OER overpotential of 189 mV and a HER overpotential of 21 mV at a current density of 10 mA cm−2. This study highlights a novel approach to the design of advanced bifunctional electrocatalysts by engineering interfacial bridge bonds.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yifan Zhang,Sylvestre Ndayiragije,Ming Chen,Xiaobo Wang,Lihua Zhu,Nan Wang
Fe- and nitrogen-doped carbonaceous (Fe-N-C) sites supported on MnO 2 (Fe-N-C@MnO 2 ) were prepared by a solvent-free mechanochemical method for peroxymonosulfate (PMS) activation to degrade norfloxacin (NFX). After a 50-min ball milling of iron(II) phthalocyanine (Fe( II )Pc) and MnO 2 at a weight ratio of 7.5 %, the obtained Fe-N-C@MnO 2 exhibited exceptional activity in PMS activation, achieving nearly complete degradation of NFX in 5 min with a rate constant of 0.62 min −1 . This rate constant was 11.5 and 28.2 times higher than that for milled MnO 2 (bm-MnO 2 ) and the mixture of Fe( II )Pc and MnO 2 , respectively. Alternative iron sources (FeSO 4 , FeCl 2 , Fe(III)-EDTA) and phthalocyanine showed no enhancement. Characterization revealed Fe-N-C@MnO 2 possessed abundant Mn 3+ , oxygen vacancies and Fe-N-C sites. Combined experimental and computational studies demonstrated Fe-N-C@MnO 2 simultaneously enhanced the 1 O 2 generation and facilitated the formation of SO 4 •− , •OH and O 2 •− , with contributions to NFX degradation following: 1 O 2 > •OH ≈ O 2 •− > SO 4 •− . This work establishes mechanochemical coordination engineering as a facile strategy for constructing high-performance metal-N-C hybrid catalysts.
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JOM
·
2024
·
IF 2.1
Yu Yu,Li Ying,Zhong Yiwei,Wang Mingyong,Guo Zhancheng
Fe-Ni-Co alloy films demonstrate outstanding soft magnetic properties and are widely used as magnetic materials. The ultrasonic-assisted electrodeposition method is highly regarded for its merits in improving alloy film performance. In this study, Fe-Ni-Co alloy film with a uniform composition was fabricated through ultrasonic-assisted electrodeposition. The effects of the electrodeposition parameters on the composition and microstructure of the Fe-Ni-Co alloy films were studied. The results revealed that lower initial electrolyte pH, temperature ( T ), and ultrasonic power ( P ) were conducive to the increase of the iron content of the alloy films. As the ultrasonic power increased, the crystal structure of the Fe-Co-Ni films changed from bcc (FeCo) to fcc (NiFe), and the mean grain size decreased. When the electrodeposited condition was pH = 2, T = 50°C, and P = 45 W, the Fe 58.36 Ni 36.01 Co 5.63 alloy film showed a better corrosion resistance than 304 stainless steels. When the electrodeposited condition was pH = 2, T = 50°C, and P = 90 W, the Fe 53.84 Ni 41.66 Co 4.48 alloy film exhibited good magnetic properties, and the saturation magnetic induction and coercivity were 1.75 T and 85 A/m, respectively, which was much better than Fe-Co-Ni alloy films (Ni: about 40 wt.%) prepared by traditional electrodeposition.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Sa Liu,Yapeng Chen,XinKuan Li,Yijia Yao,Huashan Wang,Meiyi Wang
Food packaging films containing antimicrobial reagents play a crucial role in preventing bacterial-induced fruit decay. This study proposes a bilayer film consisting of an internal amino-modified starch hydrophilic layer and an external amino-modified polyvinyl alcohol/polylactic acid hydrophobic layer, embedding alliin@MIL-101(Fe) as an antibacterial agent, utilizing the pH reduction of fruit decay sites to achieve pH-responsive release, enhancing antibacterial performance. Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analyses confirm successful crosslinking between amino and aldehyde groups, resulting in the formation of imine bonds and a mesh-like structure conducive to adsorption. Under acidic conditions, the cumulative release rate of alliin reached 74 % within 36 h. Compared to a simple mixture, the tensile strength of the alliin@MIL/NST-NPVA/PLA film reached 34.771 MPa, and transmittance in the wavelength range of 200–370 nm decreased to 0. The scavenging rate of DPPH free radicals in the film can reach 83 %. In addition, the water vapor permeability and oxygen permeability of the film are approximately 7.62 × 10 −16 [g/ (m 2 ‧24 h‧0.1 mm)] and 6.83 (m 2 ‧24 h‧0.1 MPa), respectively; moisture content and water solubility decreased to 10.99 % and 20.77 %. This composite film extended the shelf life of strawberries from 2 to 7 days, significantly enhancing freshness.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2024
·Vol. 25
·期 18
·9855
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IF 4.9
Yiting Luo,Rongkui Su
Tetracycline’s accumulation in the environment poses threats to human health and the ecological balance, necessitating efficient and rapid removal methods. Novel porous metal–organic framework (MOF) materials have garnered significant attention in academia due to their distinctive characteristics. This paper focuses on studying the adsorption and removal performance of amino-modified MIL-101(Fe) materials towards tetracycline, along with their adsorption mechanisms. The main research objectives and conclusions are as follows: (1) NH2-MIL-101(Fe) MOF materials were successfully synthesized via the solvothermal method, confirmed through various characterization techniques including XRD, FT-IR, SEM, EDS, XPS, BET, and TGA. (2) NH2-MIL-101(Fe) exhibited a 40% enhancement in tetracycline adsorption performance compared to MIL-101(Fe), primarily through chemical adsorption following pseudo-second-order kinetics. The adsorption process conformed well to Freundlich isotherm models, indicating multilayer and heterogeneous adsorption characteristics. Thermodynamic analysis revealed the adsorption process as a spontaneous endothermic reaction. (3) An increased adsorbent dosage and temperature correspondingly improved NH2-MIL-101(Fe)’s adsorption efficiency, with optimal performance observed under neutral pH conditions. These findings provide new strategies for the effective removal of tetracycline from the environment, thus holding significant implications for environmental protection.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Wenwen Yin,Jiawei Ma,Yanyan Li,Qing Cheng,Bernt Johannessen,Fangxi Xie,Mingmei Wu
Exploiting bifunctional and highly efficient electrocatalysts that can facilitate the reversible formation and decomposition of discharge products is crucial for rechargeable Na-air batteries (SABs). However, restricted by scaling relations, air cathodes based on single metal systems usually exhibit inferior activity and fail to achieve a stable and long cycle life of Na-air batteries. Dual single-atom catalysts (DACs) with two metal sites can circumvent the scaling relations and endow the single-atom catalysts with superior activity. Herein, we present a hollow carbon microsphere loaded with Ni and Fe single atoms (Ni-HCMs-Fe) as a demonstration of DAC air cathodes for SABs. Notably, Na-air batteries with Ni-HCMs-Fe as an air cathode can achieve a low overpotential gap of 530 mV, a high specific capacity of 5382.9 mAh g−1, and an ultralong cycle life of over 450 cycles (1800 hours) with NaO2 as the main discharge product. Due to the different adsorption energies between oxygenated intermediates and Ni/Fe sites, the Ni-HCMs-Fe catalysts can break through the scaling relations and display optimized binding ability towards intermediates, thus boosting the reversible formation and decomposition of NaO2 in SABs. This work pioneers the use of DACs in SABs, paving the way for their practical applications.
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ACS Applied Energy Materials
·
2025
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IF 5.5
Yu Shao,Zhisheng Mao,Jiarui Wang,Xianfeng Hao,Yongchao Jia,Yuanhui Xu,Keju Sun
The electrochemical synthesis of hydrogen peroxide through two-electron oxygen reduction (2e– ORR) presents a sustainable alternative to conventional synthesis methods, such as the anthraquinone method. TiO2-based materials are promising candidates due to their stability and tunable electronic properties, but their intrinsic 2e– ORR activity and selectivity are insufficient for practical applications. Here, we report that strategic Fe doping significantly enhances the 2e– ORR performance of TiO2. The optimized Fe-TiO2 catalyst exhibits remarkable activity and selectivity, achieving a 30% increase in H2O2 selectivity (from 47% to 77%) while reducing the electron transfer number from 3.05 to 2.45 in 0.1 M KOH electrolyte. Notably, the material shows substantially improved electrochemical active surface area (ECSA) and ORR kinetics, culminating in an exceptional H2O2 production rate of 406 mmol·gcat–1·h–1 with 97.5% Faraday efficiency at 0 V vs RHE in an H-cell configuration. Density functional theory (DFT) calculations reveal the mechanistic origins of this enhancement: Fe doping effectively narrows the band gap and lowers the oxygen vacancy formation energy, thereby boosting electrical conductivity as confirmed by experimental characterization; and the modified electronic structure increases Bader charge accumulation on the terminal oxygen of adsorbed *OOH intermediates, facilitating protonation at this site and consequently promoting the 2e– pathway. These dual effects synergistically enhance both ORR activity and H2O2 selectivity. This study not only presents Fe-TiO2 as an efficient, earth-abundant catalyst for sustainable H2O2 production but also establishes fundamental design principles for developing advanced metal oxide electrocatalysts through targeted heteroatom doping.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Yangyang Liu,Fengdi Tu,Ziyu Zhang,Zigang Zhao,Pan Guo,Lixiao Shen,Yunlong Zhang,Lei Zhao,Guangjie Shao,Zhenbo Wang
Iron and nitrogen co-doped carbon (Fe/N/C) electrocatalysts have great potential to catalyze the kinetically slow oxygen reduction reaction (ORR). Unfortunately, the ORR performance of existing Fe/N/C catalysts is seriously hindered by the insufficient density and accessibility of the atomic Fe-N x moieties. Herein, the carboxylate (OAc) molecular scissor is proposed to tailor Fe doped zeolitic-imidazolate-framework-8 (ZIF-8) at atomic scale and construct a multi-dimensional concave Fe@NC catalyst structure (Fe@MNC-OAc). This molecular scissoring strategy imparts Fe@MNC-OAc with dense accessible active sites, multidimensional mass transfer pathways, hierarchical porous structure, and entangled carbon nanotubes network. Therefore, the tailored Fe@MNC-OAc electrocatalyst exhibits excellent ORR activity in acidic media with a half-wave potential of 0.838 V, which is comparable to state-of-the-art non-precious metal catalysts. When assembled as cathode catalyst in a H 2 -O 2 proton exchange membrane fuel cell, it delivers a peak power density of 903 mW cm −2 . This work provides a new approach to tailoring the catalyst architecture and improving the accessibility of active sites.
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Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·394
·
IF 21.8
Wu Chongji,Yang Lu,Qian Zhu,Yan Zupeng,Sun Xia,Hu Weiqiang,Ma Zongqing
The conventional sintered W-Ni-Fe alloy encounters challenges in achieving both high strength and plasticity simultaneously, primarily due to its inadequate organizational compatibility. To address this issue, we developed a novel approach combining in situ freeze-drying and straightforward liquid-phase sintering techniques to effectively control the microstructure of 93W-4.9Ni-2.1Fe alloys. The corresponding W-Ni-Fe alloy in this work simultaneously takes into account ultrafine W grains (28.3 µm), low W-W connectivity (CW-W = 0.31), and suitable γ phase volume fraction (20.2%), which is currently difficult for traditional W-Ni-Fe alloys to achieve. The minute dimensions of nanopowder play a crucial role in inhibiting Ostwald ripening and facilitating W grain refinement. Additionally, the extensive surface area of nanopowder enhances capillary penetration, leading to effective homogenization of high γ phase volume. As a result, the freeze-dried W-Ni-Fe alloy simultaneously achieves high strength (1010 MPa) and high plasticity (31%), which provides a new insight for the further development of W-Ni-Fe alloy industries.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yunxiao Zheng,Xiaohui Wu,Yongchun Zhao,Tao Zhou,Mingjie Huang
Polymerization transfer (PT) technology is highly advantageous for treating high-salinity wastewater due to its high tolerance to coexisting anions and superior electron utilization efficiency. Here, we report the unusual simultaneous achievement of rapid pollutant removal (pseudo-first-order rate constant of 0.15 min −1 , 56.0-fold higher than unmodified counterparts) and high PT ratio (>65 %) in a peroxymonosulfate (PMS) activation system. This was achieved by simply tuning the Fe content within a rationally designed Fe/N engineered pine sawdust biochar catalyst. Performance enhancement stems from Fe-induced graphitization improving electron transfer, coupled with N-induced moderate orbital hybridization between Fe 3 d (Fe/N biochar) and O 2 p (PMS) atomic states, optimizing PMS adsorption-desorption and yielding the lowest energy barrier for Fe(IV) O formation. Remarkably, the system maintains robust performance under high salinity conditions (500 mM Cl − , HCO 3 − , NO 3 − , and SO 4 2− ) and achieves 67.5–77.3 % chemical oxygen demand (COD) removal during 17-day continuous-flow treatment of real coking wastewater, where polymerization-mediated organic removal through C C/C O coupling. Furthermore, residual oligomers are efficiently removed by subsequent activated carbon (AC) adsorption or poly-ferric sulfate (PFS) coagulation, establishing an integrated “catalytic polymerization-AC/PFS polishing” paradigm for sustainable treatment of refractory organics in high salinity coking wastewater.
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