JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Hui Su,Furong Ye,Siyi Zhang,Changcun Han,Jipeng Dong,Zhixin Dai,Xinguo Ma,Lei Ge
The sluggish anodic oxygen evolution reaction (OER) kinetics remains a critical bottleneck for sustainable hydrogen production via water electrolysis. Guided by Density Functional Theory (DFT) calculations, we engineered Fe-CoS 2 /Ni 3 S 4 dual-site catalysts where Co 3+ and Fe 3+ centers synergistically optimize p-d orbital hybridization to enhance OER kinetics. Operando analyses reveal Co 3+ as primary active sites facilitating rate-limiting OOH* → O 2 desorption with Gibbs free energy (ΔG) reduced by 0.94 eV, while Fe-induced electron delocalization lowers intermediate coupling barriers. Notably, the catalyst facilitates dynamic reconstruction, generating metastable Co 3+ species with optimized eg orbital occupancy (t 2 g 5 eg 1 configuration) and strengthened p-d hybridization via Fe-mediated charge transfer. This electronic synergy enables ultralow overpotentials of 156 mV (hydrogen evolution reaction HER) and 230 mV (OER) at 50 mA cm −2 , with a cell voltage of 1.48 V for overall water splitting at 10 mA cm −2 . The dual-site architecture simultaneously suppresses metal dissolution (<12 % after 20 h) while maintaining 89.2 % initial activity. This work establishes a dual-regulation strategy: atomic-level orbital engineering for OER intermediate optimization and dynamic surface reconstruction for HER-active phase stabilization, offering a paradigm for designing robust bifunctional electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jun Zhu,Jingjing Chen,Congcong Wang,Dehong Yu,Minghao Chao,Hanrong Yan,Ruqi Huang,Zhenxin Wang,Bin Pan,Fenglei Gao
Insufficient generation of reactive oxygen species and the highly active cholesterol metabolism of tumors are two major barriers limiting the efficacy of conventional ferroptosis-based cancer therapies. Here, we engineered a single-atom iron nanozyme (Fe-NC@TASIN-30@FA, abbreviated as FTF) to overcome ferroptosis resistance and sensitize tumors to apoptosis-coupled catalytic therapy by simultaneously delivering a distal cholesterol synthesis inhibitor and catalytically amplifying ROS production. FTF is constructed by loading a selective 7-dehydrocholesterol (7-DHC) synthesis inhibitor, TASIN-30, onto an iron single-atom nanozyme and further functionalizing it with folate-modified polyethylene glycol (SH-PEG-FA) to confer tumor-targeting capability. Notably, TASIN-30 is incorporated with a drug-loading rate of 22.5%, providing efficient payload delivery without compromising nanozyme activity. The iron active centers in FTF exhibit dual enzyme-mimetic activities. One of them is peroxidase-like activity that breaks down H 2 O 2 into hydroxyl radicals, and the other is glutathione peroxidase-like activity that catalyzes the oxidation of reduced glutathione to oxidized glutathione, thereby increasing intracellular ROS levels and consuming antioxidants to achieve a coordinated iron apoptosis effect. In addition, by inhibiting 7-DHC and cholesterol biosynthesis, FTF accelerates the consumption of excess intracellular cholesterol in tumor cells, disrupts the integrity of lipid rafts, and consequently suppresses tumor cell proliferation. In 143B tumor-bearing nude mice, FTF achieves an in vivo tumor inhibition rate of approximately 82.5%, while exhibiting a maximum tolerated dose of 7.5 mg/kg. Overall, this study proposes a new therapeutic strategy that integrates cholesterol metabolic interference with catalytic nanozyme therapy, providing a potent ferroptosis-apoptosis synergistic modality for tumors refractory to conventional treatments.
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Materials Today Physics
·
2026
·
IF 9.3
Kexun Li,Fangyu Shi,Yanxia Wu,Min Zhao,Ying Liu
Modulating the electromagnetic properties of Ti 3 C 2 T x MXene to produce an ideal multifunctional and efficient microwave absorbent is a challenging research hotspot. Although the atomic layer deposited transition magnetic metal nanostructures are a feasible strategy, the effects of the components and microstructure of the introduced magnetic nanostructure on the electromagnetic wave absorption performances of the MXene are still far from clear. Here, the Fe element has been selected as the modifier, and a heterostructure Fe/Ti 3 C 2 T x MXene hybrid is constructed by the atomic layer deposition of Fe nanoparticles on the Ti 3 C 2 T x nanosheets. The influences of the deposition cycles on the chemical composition, microstructure, electromagnetic response characteristics, and microwave absorption properties are investigated. The results show that the decoration of Fe nanoparticles enables a tunable electromagnetic performance. The Fe/Ti 3 C 2 T x MXene hybrid achieves an optimal attenuation with the minimum reflection loss of -82.94 dB at a small thickness of 1.16 mm, corresponding with an effective absorption bandwidth of 3.76 GHz. The strong microwave absorption is attributed to the dielectric-magnetic synergy in the MXene and Fe nanoparticles, which provides excellent impedance matching, interfacial and dipolar polarization loss, and magnetic resonance loss. Specifically, the hybrid endows a low Fe content of 2.66 wt%. This is important for the design of a lightweight absorber with high attenuation efficiency.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·96
·
IF 36.3
Fang Wenhan,Xu Kailong,Wang Xinlei,Zhu Yuanhang,Li Xiuting,Liu Hui,Li Danlei,Wu Jun
A universal synthetic strategy was proposed to construct heteroatom axially coordinated Fe–N 4 single-atom seawater catalyst materials (Cl–Fe–N 4 and S–Fe–N 4 ).
The Cl–Fe–N 4 catalyst achieves a limiting current density of 5.8 mA cm −2 and a half-wave potential of 0.931 V vs. RHE in alkaline synthetic seawater, outperforming commercial Pt/C (40 wt%).
The seawater-based zinc-air battery fabricated with Cl–Fe–N 4 demonstrates a power density of 187.7 mW cm −2 at 245.1 mA cm −2 and maintains stable cycling performance for 200 h.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lingfeng Li,Yandi Wen,Guokang Han,Yuxin Liu,Yajie Song,Wei Zhang,Jia Sun,Lei Du,Fanpeng Kong,Yulin Ma,Yunzhi Gao,Jiajun Wang,Chunyu Du,Geping Yin
Developing advanced non-precious metal catalysts towards acidic oxygen reduction reaction (ORR) is critical for electrochemical energy conversion devices. Fe-N-C catalysts are demonstrated to be the most promising alternatives to platinum-based catalysts for ORR. Herein, Fe single atoms (SAs) coordinated by pyridinic nitrogen catalysts (denoted as Fe-pyridinic N-C) are synthesized through pyrolysis of ZIF-8 encapsulating ferrocene. Owing to the synergistic effects between Fe SAs and pyridinic N, Fe-pyridinic N-C exhibits remarkable ORR activity and outstanding stability in acid media, evidenced by golden kinetic current density of 9.71 mA cm −2 at 0.8 V, along with only 21 mV decrease in half-wave potential after 20,000 cycles. Theoretical calculations demonstrate that pyridine-type N possesses stronger binding energy with Fe SAs compared with pyrrole-type N, in other words, high pyridinic N content will help stabilize the catalyst. This study will be of great significance for the development of non-noble metal catalysts towards ORR with enhanced stability in acidic media.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2026
·
IF 4.9
Qianqian Liu,Yusong Pan,Peixuan Zou,Ling Peng,Cuilian Wei,Wenjie Luo,Run Huang,Xiuling Lin,Jun Tao
This study overcomes intracellular antioxidant barriers limiting chemodynamic therapy (CDT) by designing an Fe-Cu bimetallic organic framework (MOF) nanocarrier. Synthesized solvothermally, the spindle-shaped MOF (long axis: 3.5 μm; short axis: 2 μm) exhibits a high specific surface area (381.96 m 2 /g) and mesopores (6.69 nm diameter), as verified by SEM/XRD/FT-IR/BET/XPS. The coexisting Fe 3+ /Fe 2+ and Cu 2+ sites enable synergistic catalysis, achieving 68.2 ± 2.1% doxorubicin (DOX) loading with pH-responsive release in tumor-mimetic acidosis (pH 5.4; 78% cumulative release at 72 h, 7.8× higher than neutral pH). In vitro studies confirm dual functions: efficient glutathione depletion (60% absorbance reduction at pH 6.2, 300 μg/mL MOF) and enhanced hydroxyl radical generation via Fenton/Fenton-like reactions (40× TMB absorbance increase). Cell assays demonstrate low cytotoxicity to normal 293T cells within 48 hours (>80% viability at 25 μg/mL) versus potent synergistic efficacy against HeLa cells under simulated tumor microenvironment (100 μM H 2 O 2 ), where chemo-CDT reduces viability to 35% (31.4-37.5% improvement over monotherapies). This work establishes a self-driven platform for tumor-targeted synergistic therapy.
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Materials
·
2022
·Vol. 15
·期 16
·5652
·
IF 3.748
Qing Ye,Gongming Qian,Lulu Liu,Fu Yang,Wei Liu
The recycling and regeneration of Fe(III) is the key point for promoting the oxidation reaction of ore to produce acidic mine drainage (AMD). Hydroxyapatite (HAP) has excellent adsorption ability of Fe(III), which has good biocompatibility and is widely distributed in nature. In order to achieve the source treatment of AMD, the migration and transformation of Fe(III) in the presence of HAP were systematically investigated. In this study, the influence of HAP on the migration of Fe(III) was evaluated though the transformation capacity of Fe(III) by HAP. The adsorption transformation kinetic, equilibrium and thermodynamics of Fe(III) using HAP were also systematic investigated. The transformation efficiency of Fe(III) increased with the increasing initial pH value and reached 99.8% at a pH of 5 due to the hydrolysis reaction. The transformation efficiency was also up to 99% at an initial pH of 2 when the reaction temperature increased to 313 K. However, the transformation capability of Fe(III) decreases with reaction temperature. The kinetics of the adsorption of Fe(III) fitted the pseudo second order kinetic model. Experimental results were also analyzed by the Langmuir isotherm equations at room temperatures. RLseparation factor for Langmuir isotherm showed that the migration of Fe(III) is successfully hindered by HAP. Various thermodynamic parameters such as enthalpy (ΔH), Gibbs free energy (ΔG) and entropy (ΔS) changes were computed, which showed that the transport lag of Fe(III) caused by HAP is spontaneous and endothermic.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 14
·9219-9229
·
IF 4.4
Zhao Mo,Wu Wei,Chen Wei,Dong Yayun,Yang Jing,Shi Yuewu,Li Jinxi,Wang Wenbing,Zhou Yifu,Wang Xutong
The magnetostriction effect of ferrite materials will adversely affect their application in high-precision electrical measurement scenarios. In this study, vanadium pentoxide (V 2 O 5 ) was introduced as both a sintering aid and a dopant in the solid-state sintering process of iron-deficient NiCuZn ferrites with the composition (Ni₀.₂Cu₀.₂Zn₀.₆O)₁.₀₃(Fe₂O₃)₀.₉₇. The results show that the addition of V₂O₅ effectively promots grain growth, increasing the average grain size from approximately 1 μm to 6 μm, and enhances the compactness of the material, which would compensate the magnetization reduction due to the replacement of Fe 3+ by V 5+ . When the doping concentration of V 5+ is controlled below 3 at%, the magnetostriction strain of the ferrite can by minimized to approximately 8 ppm without significant loss of key magnetic properties such as permeability and saturation magnetization. In addition, vanadium doping also improved electrical resistivity of NiCuZn ferrite, thereby reducing eddy current losses and power loss of material under high-frequency (50 kHz and 100 kHz) electromagnetic fields, which make the V 5 ⁺ doped NiCuZn ferrites possibly be used in the high-precision and high frequency measurement.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 10
·596
·
IF 3.5
Wang Shu,Tian Lijiang,Zhai Zhenyu,Zhang Jie,Pan Fan,Wang Minqi,Zong Mengchen
Fe-based Metal–Organic Frameworks (MOFs) show promise as heterogeneous Fenton-like catalysts; however, in the removal of hydrophobic VOCs, traditional wet Fenton systems suffer from slow Fe 3+ /Fe 2+ cycling and high gas–liquid mass transfer resistance, severely limiting their industrial application. To address these challenges, this study proposes a dual optimization strategy. Specifically, a gas-phase H 2 O 2 Fenton-like system was constructed to overcome mass transfer limits, and multivalent Mn was introduced into the MIL-100(Fe) to accelerate the Fe 2+ /Fe 3+ cycle. Among the synthesized catalysts, MIL-100(Fe 4 Mn 1 ) (4FM) exhibited superior catalytic performance, achieving 85% toluene degradation efficiency and a capacity of 87.17 μg C 7 H 8 /(g·min)) under optimized conditions, significantly outperforming its monometallic counterparts. Characterization results reveal that 4FM retains an ordered crystalline structure with highly dispersed active sites and an optimized pore architecture. Mechanistic studies indicate that Fe–Mn synergy induces an “electron pump” effect, utilizing the thermodynamic potential differences to accelerate the reduction of Fe 3+ to Fe 2+ . Concurrently, the system establishes dual reaction centers (Fe and Mn), where efficient Mn 2+ /Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ redox cycles facilitate sustained gaseous H 2 O 2 activation into hydroxyl radicals (·OH), promoting efficient toluene degradation. This study provides a promising strategy utilizing gas-phase Fenton-like catalytic technology to overcome kinetic and mass transfer bottlenecks in degrading of hydrophobic VOCs. Graphical
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Applied Materials Today
·
2026
·
IF 7
Weixiao Gong,Zhendong Liu,Zheng Wang,Yannan Jia,Guanghui Lu,Lu Li,Xiaoqin Li,Junchi Zhang,Haichen Cui,Yuanxiang Shan,Wanting Feng,Hongqin Xue
FeMn-HATP was synthesized as an efficient Sb(III) adsorbent. • Synergistic oxidative adsorption by FeMn-HATP enhances Sb(III) removal efficiency. • Kinetic, isotherm, and thermodynamic studies investigated FeMn-HATP adsorption. • An Sb(III) degradation mechanistic pathway is proposed. • FeMn-HATP demonstrated excellent regeneration performance in fixed-bed column tests. An affordable, environmentally friendly, simple adsorbent for Sb(III) removal from aqueous solutions was prepared using attapulgite (ATP) as the matrix, and FeSO 4 and KMnO 4 as metal precursors, through an in situ precipitation approach. The morphology, pore structure, and surface chemical properties of the material were analyzed using various characterization techniques. The results indicate that the iron-manganese bimetallic-modified acid-activated ATP (FeMn-HATP) surface is loaded with relatively uniformly distributed iron and manganese components, and its specific surface area and pore structure differ significantly from the original ATP. These changes promote pollutant molecule diffusion and contact. In batch adsorption experiments, FeMn-HATP achieved good Sb(III) removal performance and remained relatively stable within a pH range of 4 −10. The material maintained a relatively stable adsorption capacity even in the presence of high concentrations of other anions. Adsorption of Sb(III) by the modified ATP better conforms to both Elovich kinetic and Langmuir isotherm models, with a theoretical maximum adsorption capacity of 102.79 mg/g at 318.15 K. Fixed-bed cycling experiments demonstrated that FeMn-HATP retained significant adsorption capacity after five NaOH regenerations, with a dynamic adsorption capacity of 14.68 mg/g and a regeneration efficiency of 68.16%. Overall, FeMn-HATP exhibits good potential for Sb(III) removal with a degree of reusability, indicating promise for the treatment of antimony-containing wastewater. Download: Download high-res image (262KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huajing Zhou,Yuanxin Huang,Wenbo Zhao,Lingxiang Zhao,Sai Tian,Tiancheng Li,Liang He
Lattice oxygen defects promote efficient oxidant activation • Iron and manganese sites drive singlet oxygen dominated oxidation • Rapid antibiotic degradation achieved in real water matrices • Catalyst shows low metal leaching and good cycling stability • Treated effluents show low ecological risk in seed germination tests Enhancing the activation efficiency of peroxymonosulfate (PMS) to generate reactive oxygen species (ROS) is crucial for boosting Fenton-like reactions. However, simultaneously promoting PMS adsorption, accelerating interfacial electron transfer, and shifting the activation pathway to optimize its activation kinetics still poses a substantial challenge. Herein, we developed a bimetallic catalyst enriched with lattice oxygen defects, denoted as Fe 14 Mn 1 -LOx, for PMS activation toward the remediation of emerging organic contaminants in aquatic environments. Combined experimental and theoretical mechanistic studies reveal that the intrinsic catalytic activity of Fe 14 Mn 1 -LOx originates from the intermetallic lattice oxygen defects (Fe-O latt -Mn). These defects significantly elongate the O O bond of adsorbed PMS and drastically lower its dissociation energy to 5.79 kJ mol −1 . Furthermore, the Fe-O latt -Mn sites increase the electron density near the Fermi level and adopt a bidentate coordination configuration, enabling faster and more efficient electron transfer to the O O bond, thereby promoting the generation of radical and non-radical species, predominantly singlet oxygen ( 1 O 2 ) with a contribution as high as 97.4%. Benefiting from these merits, the Fe 14 Mn 1 -LOx catalyst exhibits an exceptional degradation rate constant of 0.513 min −1 for tetracycline (TC), a representative emerging contaminant. This rate is 3.72 and 24.4 times higher than those of pristine FeOx (0.138 min −1 ) and MnOx (0.021 min −1 ), respectively. Remarkably, complete TC removal (100%) is achieved within just 10 min, outperforming most reported analogous catalysts. This work underscores the critical role of precisely engineering intermetallic lattice oxygen defects to modulate heterogeneous PMS activation, offering an innovative catalyst design strategy for efficient deep purification of emerging contaminants in real water matrices. Download: Download high-res image (263KB) Download: Download full-size image
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Magnetochemistry
·
2026
·Vol. 12
·期 7
·71
·
IF 2.8
Hui Peng,Yutong Xie,Daode Zhu,Longqin Wang,Leihao Han,Yumeng Cai
Iron powder cores are widely used in cost-sensitive low- to medium-frequency applications because of their high saturation magnetisation, low cost and favourable formability. However, the low electrical resistivity of iron powders favours continuous conductive pathways between adjacent particles, leading to high-frequency eddy-current loss and heat accumulation. To combine electrical insulation, interfacial stability, magnetic-property retention and thermal diffusion in a single coating, a synergistic insulation/thermal-conduction coating based on thiol-functionalised boron nitride was designed for iron-based magnetic powder cores. Hexagonal boron nitride was surface-modified through ultrasonic activation followed by grafting with a mercaptosilane coupling agent, forming covalent linkages on the boron nitride surface. The resulting functionalised nanosheets were deposited onto water-atomised iron powders through interfacial interactions between nitrogen- and sulfur-containing functional groups and the iron surface. A coating content of 5 wt.% produced a relatively continuous and uniform interfacial layer with limited agglomeration, enabling the magnetic powder cores to combine interparticle insulation, loss reduction, magnetic-property retention and thermal transport. The optimised core exhibited a volume resistivity of 58.7 Ω·m and a total core loss of 81.2 kW/m3at 10 mT and 100 kHz, corresponding to a 20.8% reduction relative to the pure iron core. The sample retained a saturation magnetisation of 201.4 emu/g and an effective permeability of 67.5 at 100 kHz, while achieving a thermal conductivity of 55.2 W/(m·K) and a thermal impedance of 0.215 K·m2/W. Loss-separation analysis indicates that the continuous insulating layer restricts interparticle induced-current pathways and suppresses high-frequency eddy-current loss, while the two-dimensional boron nitride framework promotes internal thermal diffusion.
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