ACS Applied Polymer Materials
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2026
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IF 5.2
Ming Gao,Huiting He,Zhengwu Zhang,Lina Yue,Junfei Li,Xuexi Chen
Abstract With the increasing fire safety requirements of epoxy resin (EP), developing sustainable and efficient flame retardants has become highly desirable. In this work, a bio-based phosphorus–nitrogen flame retardant (DA-HCCP) was synthesized using dopamine (DA) and hexachlorocyclotriphosphazene (HCCP), followed by Fe3+ coordination to construct a metal-containing flame-retardant architecture (Fe@DA-HCCP). Subsequently, the as-prepared Fe@DA-HCCP was incorporated into EP to investigate its effects on thermal stability, combustion behavior, and flame-retardant mechanisms. With a loading of only 5 wt %, the EP/Fe@DA-HCCP composites achieved a UL-94 V-0 rating and a limiting oxygen index (LOI) of 33.5%, together with significantly enhanced char formation and thermal stability. Cone calorimetry results revealed that the peak heat release rate (pHRR) and total smoke production (TSP) decreased by 51.7% and 37.2%, respectively, while the time to ignition (TTI) was markedly prolonged, indicating substantially suppressed fire hazard. Mechanistic investigations demonstrated that DA-HCCP primarily exerted flame retardancy through phosphorus–nitrogen synergism by promoting char formation in the condensed phase, while phosphorus-containing active species, including PO• radicals, may provide an auxiliary contribution through gas-phase radical quenching. More importantly, the incorporation of Fe3+ facilitated catalytic dehydration, aromatization, and graphitization during thermal degradation, leading to the evolution of a compact and thermally stable carbonaceous protective layer. Simultaneously, the generation of combustible volatiles and smoke precursors was effectively suppressed. In addition, Fe3+ coordination improved the glass transition behavior and stiffness of the epoxy composite, while maintaining favorable dispersion within the EP matrix. This work provides an effective strategy for constructing bio-based multifunctional flame-retardant systems by integrating phosphazene chemistry with transition-metal catalysis.
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高影响因子
ACS Applied Materials & Interfaces
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2026
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IF 7.8
Canfu Zhang,Yuqi Chen,Jinbo Ye,Hao Cheng,Bowen Yang,Changwei Shi,Ting Zhu,Ping Hu,Yongming Hu
Na4Co3(PO4)2P2O7 is a representative mixed polyanionic cathode with a high operating voltage and high energy density. However, insufficient cycling stability is the core bottleneck constraining the widespread application of sodium-ion batteries (SIBs). Herein, we propose a synergistic strategy that combines non-stoichiometry with Fe2+ doping to construct Na3.4Co2.4-xFex(PO4)1.4P2O7 (NCFPP-x), which not only enhances phase purity but also improves material stability. Through ex situ electrochemical impedance spectroscopy-distribution of relaxation times and galvanostatic intermittent titration technique analyses, it is demonstrated that Fe doping leads to the reduced charge transfer impedance and enhanced Na+ diffusion coefficient. The in situ XRD characterization results demonstrate a highly reversible incomplete solid-solution reaction mechanism during the Na+ intercalation and deintercalation processes. The NCFPP-1.2||Hard carbon (HC) full cell assembled with an HC anode delivers an energy density of 325 Wh kg-1, retaining 80.0% after 200 cycles. The present work offers important theoretical basis and experimental support for the advancement of high-voltage polyanion-type cathode materials.
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Xianxian Gong,Ruifeng Zhang,Jing Yang,Zixuan Xu,Baoyu Guo,Zengyue Zhang
Fe-enhancement improved the performance of the ceramic membranes. • Modifying manganese sand method is the optimal Fe-enhancement pathway. • Water flux and TC removal rate increased to 746.24−949.76 L m −2 h −1 and 72%−78%. • Fe-enhancement initiated the Fe-Mn synergistic catalysis. In this study, three types of Fe-enhanced natural manganese sand-based ceramic membranes were prepared by the methods of integrated sintering, surface impregnation, and modifying manganese sand, respectively, and were used to activate peroxymonosulfate for tetracycline (TC) removal from water. The membrane catalytic performance, anti-fouling ability, catalytic mechanisms, and the differences among the enhancement methods, were investigated. After Fe enhancement, the membrane porosity increased from 7.20% to 14.72%–20.20%, while the water contact angle decreased from 77.23° to 45.19–57.81°, leading to a significant improvement in pure water flux from 180.91 L m −2 h −1 to 746.24–949.76 L m −2 h −1 . Additionally, the TC removal rate increased from 54% to 72%–78% and the water flux attenuation was significantly mitigated, with the J/J 0 rising from 0.11 to 0.50. Multi-cycle repeated experiments showed that the ceramic membranes exhibited good catalytic stability. The average removal rate of TC remained above 68% after six successive runs. The iron leaching concentrations of all the membranes, except for the NMSFe-CM, were below 0.057 mg/L within 24 h, demonstrating their excellent structural stability. Mechanism analysis indicates that Fe enhancement initiates a unique bimetallic synergy between Fe and Mn active sites, which promotes the generation of reactive oxygen species, especially singlet oxygen, thereby improving the degradation efficiency of tetracycline. As Fe 3+ was uniformly distributed on the surface of manganese sand and fully interacted with the Mn active sites, the membrane prepared by the modified manganese sand method exhibited optimal catalytic activity and good iron stability. A new insight into the preparation of natural mineral ceramic membranes and the reliable loading of catalytic materials within the membrane matrix was provided in this study. Download: Download high-res image (310KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
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2026
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IF 7.5
Zhiwei Zhang,Xiang Li,Chenghong Ao,Yan Xie,Duowen Yan,Xinchen Shang,Shakeel Ahmad,Danping Wu,Xinwei Dong,Bo Pan
Mn substitution elevates goethite's surface hydroxyl density versus pure goethite. • More surface hydroxyls on Mn-goethite accelerate humification from precursors. • Mn-goethite serves as oxidant to promote oxypolymerization of humic precursors. • DMSO hydrogen-bond shielding lowers electron transfer and Mn²⁺ release in solution. Electron transfer via hydrogen bonding is crucial for humification. s In nature settings, iron minerals usually coexist with manganese in an isomorphous-replacement manner, attributable to the equal ionic radii of ferric iron and trivalent manganese. Nevertheless, it remains unclear whether abundant surface hydroxyl groups on manganese-substituted iron minerals influence humification. Herein, the abiotic humification of humic precursors with manganese-substituted iron mineral (e.g. Mn-substituted goethite) was systematically investigated for the first time, especially in the role of hydrogen bonding interactions between the mineral and humic precursors. Mn-substituted goethite possessed a greater surface hydroxyl density compared to pure goethite, resulting in a significantly accelerated humification rate. Furthermore, the introduction of a hydrogen bonding shielding agent, such as dimethyl sulfoxide (DMSO), into the reaction system containing humic precursors and the mineral resulted in a marked decrease in both the manganese concentration within the precursor solution and the system’s overall electron transfer capability. These results demonstrated that hydrogen bonding between the mineral and humic precursors enhanced their electron transfer rate, thereby facilitating the humification process. This research offers new insights into abiotic humification mediated by iron/manganese concomitant minerals, enriching the understanding of the global carbon cycle affected by soil geochemical processes. Download: Download high-res image (243KB) Download: Download full-size image
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高影响因子
INORGANIC CHEMISTRY
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2026
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IF 4.6
Mengjun Xiao,Yu Gui,Andraž Mavrič,Yao Nie,Wendong Zhang,Peng Chen,Pengpeng Wang,Yi Wang
The chlorine evolution reaction (CER) is essential for industrial chlorine production. However, achieving high CER selectivity remains a challenge due to the high cost and narrow potential gap between the CER and the competing oxygen evolution reaction (OER) in conventional noble oxide catalysts. In this work, Hemin is adopted as a model molecular catalyst for CER owing to its porphyrin macrocycle and the axial Cl ligand, achieving an overpotential of ∼190 mV at 10 mA cm–2 with ∼100% chlorine selectivity and excellent stability over 100 h in corrosive acidic brine. Spectroscopic and electrochemical analyses reveal that the axial Cl–Fe interaction stabilizes the rigid configuration geometry of the Hemin molecule, while the π-conjugated macrocycle and the Fe-centered electronic effect jointly modulate the electronic state of Fe. This combination effectively suppresses electrochemical demetalation and preserves structural integrity for enhancing selectivity and durability. It is hoped that this work can propose fundamental insight into the rational design of efficient molecular electrocatalysts for promoted chlorine evolution.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Lu Cao,Huijiadai Luo,Xiaoxiao Huang,Yong Huang,Hua Ke
BaTiO 3 ceramics were synthesized via a conventional solid-state reaction method to investigate the influence of lattice strain induced by tiny content of Fe 3+ doping (1 mol%) on the structural evolution and ferroelectric properties. The incorporation of Fe 3+ introduces a compressive strain field, resulting in a reduced c / a ratio and a disordered domain configuration. Such lattice strain significantly enhances the maximum ferroelectric polarization ( P max ) from 23.2 μC/cm 2 for undoped BaTiO 3 ceramic to 40.6 μC/cm 2 for BaTi 0.99 Fe 0.01 O 3- δ ceramic. This observed enhancement is attributed to a lowered energy barrier for polarization switching and the facilitation of domain wall motion. Phenomenological analysis based on symmetry-related strain-polarization coupling further reveals that the Fe 3+ induced compressive strain mitigates the lattice mismatch stress at domain boundaries and alleviates the strain constraint on polarization switching. These findings clarify the relationship between chemical-doping-induced lattice strain and ferroelectric performance, offering a pathway for the deliberate control of domain structure to achieve high ferroelectric performance in bulk ceramics.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2026
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IF 4.5
Rongyue Cao,Boyuan Chen,Jianan Liu,Jiarui Li,Tong Li,Zhibin Li,Baojiang Jiang
Efficient acrolein production at lower temperature (200 °C). • Optimal acidity identified by tuning the Si/Al ratio in ZSM-5. • Trace Fe enhanced yield 2.4 times more and improved coke resistance. • Synergistic promotion of glycerol dehydration by Brønsted and Lewis acids. The catalytic dehydration of glycerol to acrolein represents a sustainable route for biomass valorization. However, most reported systems require high temperatures or pressure, which limits energy efficiency and sustainability. Furthermore, the relationship between catalyst acidity and acrolein formation in the liquid phase remains inadequately understood. In this work, we demonstrate that nano-sized ZSM-5 zeolites enable high acrolein selectivity under notably milder conditions (200 °C, 1.2 MPa). 0.3 % Fe-modified ZSM-5 (60) catalyst exhibits an acrolein yield rate 2.4 times higher than unmodified zeolite, achieving 41.3 % glycerol yield with 84.2 % selectivity. This enhancement originates from a tailored Brønsted-Lewis acid synergy, wherein Brønsted sites steer the reaction pathway while adjacent Fe-derived Lewis sites promote the dehydration steps. This study not only provides an efficient low-temperature strategy for glycerol conversion but also clarifies the role of acid-site synergy in liquid-phase dehydration, offering a rational approach for designing durable and selective catalysts. A series of ZSM-5 catalysts with varying Si/Al ratios were synthesized via a one-pot hydrothermal method, among which ZSM-5 (60) was identified as the optimal candidate due to its appropriate Brønsted acidity. To further enhance the cycling stability, an Fe-modified ZSM-5 catalyst was constructed by the introduce of Fe, which generated additional Lewis acid sites, creating a synergistic Brønsted-Lewis acid system. In the low-temperature (200 °C) dehydration of glycerol to acrolein, the Fe/ZSM-5 (60) catalyst achieved an acrolein yield 2.4 times than that of the unmodified ZSM-5 (60), while also exhibiting significantly improved resistance to coke formation. Download: Download high-res image (323KB) Download: Download full-size image
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2026
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IF 16.8
Li Shao,Genyuan Fu,Jingming Ran,Qingwen Zheng,Yashi Ma,Jihong Li,Zhengjun Wang,Tongzhou Wang,Yida Deng
Clarification of Fe behavior during seawater OER: Demonstrating that Fe in NiFe oxides undergoes continuous dissolution under seawater OER conditions, but can be dynamically stabilized through chloride-regulated speciation rather than being irreversibly lost. • Identification of a chloride-regulated Fe stabilization mechanism: Reveling that dissolved Fe 3+ forms FeCl 4 - species in the electrolyte and dynamically redeposits onto the anode surface, enabling continuous regeneration of surface Fe motifs while suppressing chloride-induced corrosion. • Mechanistic link between Fe regulation and durable OER performance: Chloride-regulated Fe redistribution stabilizes high-valence Ni active sites, suppresses lattice oxygen participation, and accelerates OER kinetics, resulting in low overpotential and operating continuously in real seawater for 4,000 hours with an extremely low degradation rate of 3.49 µV h⁻¹. In seawater electrolysis, chloride corrosion and Fe leaching-related deactivation remain the main factors limiting the operational stability of NiFe-based anodes. Here, NiFe 2 O 4 is employed as a model catalyst to elucidate the dissolution-complexation-redeposition behavior of Fe species and their cooperative interactions with Cl − during the oxygen evolution reaction (OER). We reveal that although Fe dissolution is unavoidable, OER, a portion of the leached Fe 3+ does not remain in the bulk electrolyte but rapidly coordinates with Cl − to form soluble [FeCl 4 ] − complexes. These [FeCl 4 ] − species are subsequently driven back to the anode surface under anodic potentials, giving rise to a dynamic dissolution-redeposition equilibrium. The redeposited Fe, stabilized through Fe-Cl interactions, generates surface-bound chloride species that repel free Cl − from the electrolyte, simultaneously suppressing chloride corrosion and enhancing catalytic activity. Benefiting from this metal-halide synergistic stabilization, NiFe 2 O 4 exhibits outstanding OER performance, achieving 100 mA cm −2 at a low overpotential of 248 mV and exhibiting remarkable stability, operating continuously in chloride-containing electrolyte for over 4000 h with an extremely low degradation rate of 3.84 µV h −1 . Download: Download high-res image (403KB) Download: Download full-size image
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高影响因子
Nanoscale
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2026
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IF 5.2
Wenshuo Zhao,Yanzhe Zhang,Yong-Li Wang,Tong Wu,Yingying Zhang,Jingjing Sun,Xiangrong Liu,YONGJIE ZHAO
Fe-Mn based layered transition metal oxides are compelling candidates for sodium-ion cathodes owing to their high specific capacity and cost-effectiveness. However, their practical application is hampered by inherent challenges including the Jahn-Teller effect, lattice oxygen loss, transition metal dissolution. In this study, Al/Ti co-doped Na0.67Fe0.4Mn0.4Al0.1Ti0.1O2 (FM-AT) cathode is proposed and prepared. The introduction of Al/Ti, creating strong Al-O and Ti-O bonds, effectively stabilizes the lattice oxygen and elevates the reversibility of anionic redox reactions. Furthermore, the stability of the transition metal layer is effectively enhanced, suppressing transition metal dissolution and the P2-OP4 phase transition associated with TMO2 layer slippage at deep charge states. The FM-AT demonstrates excellent cycling stability, with a capacity of 137.1 mAh g-1 under 20 mA g-1 and a capacity retention of 85.5% after 50 cycles (55.7% for the pristine FM cathode). Even after 200 cycles under 200 mA g-1, a capacity retention of 72.1% is achieved (versus 20.9% for the FM). This work offers a novel method for enhancing the structural stability of iron-manganese based electrode and designing cost-effective, high-performance sodium ion cathodes.
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高影响因子
Journal of Materials Chemistry B
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2026
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IF 6.2
Xianfeng Wang,Genchang Chen,Gongle Shen,Zhenping Liu,Fengwu Lin,Lei Shen,Jianhua Su,Dapeng Zhou,Sen Yang
Salt-sensitive hypertension represents a significant global health burden, yet its underlying pathogenic mechanisms remain incompletely understood. Recent evidence indicates that the microbial metabolite α-lipomycin contributes to vascular dysfunction by selectively suppressing endothelial TRPV4 channels, thereby impairing vasodilation and promoting the development of salt-sensitive hypertension. Consequently, the highly sensitive and selective detection of α-lipomycin is of critical importance for early risk assessment and intervention. Herein, Fe-MOFs nanorods were prepared using TCPP as organic ligands and Fe(III) as metal centers via solvothermal method for α-lipomycin detection. Specific host-guest effects between α-lipomycin and Fe(III) centers in Fe-MOFs, and selectively disrupt the ligand-to-metal charge transfer within Fe-MOFs, triggering simultaneous fluorescence emission at 645 nm and brown chromogenic appearance. Consequently, Fe-MOFs nanorods serve as a fluorescent and colorimetric nanoprobe for dual-mode detection of α-lipomycin. The sensor demonstrated a broad linear response range of 0.05-10 µM and ultralow detection limits of 23.83 nM (fluorescence) and 409.80 nM (colorimetry), respectively. Furthermore, the dual-signal response of the Fe-MOFs nanoprobe toward α-lipomycin further confers exceptional selectivity against interferents and high repeatability (RSD < 5.64%). Notably, practical validation in tap water shows acceptable recoveries from 93.47 to109.35% recovery rates. Importantly, clinical serum analyses demonstrate a elevated α-lipomycin level in hypertensive patients, validating strong practicability of Fe-MOFs nanoprobe for early pathogenesis detection and therapeutic monitoring. These findings highlight the Fe-MOFs nanoprobe as a dual-mode optical platform for selective and reliable α-lipomycin detection. Its field-deployable design overcomes the clinical limitations in utility of conventional methods like mass spectrometry. It also offers a transformative approach for applications in pathogenesis research, typing, early warning, and prevention of salt-sensitive hypertension.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.6
Guojuan Hai,Jing Wang,Wenwen Zhao,Liyun Cao,Jianfeng Huang
Electrocatalytic hydrogen production in neutral electrolytes offers a sustainable pathway toward clean hydrogen, but its development is severely constrained by sluggish reaction kinetics and the lack of high-performance non-noble metal electrocatalysts. Herein, efficient hydrogen production is achieved by integrating heterogeneous structure engineering with iron (Fe) doping, fabricating the Fe-Cu2O/WO3/CF material. Results demonstrate that Fe doping and Cu₂O/WO₃ heterojunction construction exert a synergistic effect in optimizing the catalyst's structural and electronic properties: Fe doping induces lattice distortion, generating abundant oxygen vacancies and coordinatively unsaturated active sites, while the Cu₂O/WO₃ heterojunction accelerates interfacial electron transfer. Electrochemical tests show that Fe-Cu₂O/WO₃/CF exhibits excellent HER activity, requiring overpotentials of 95 mV to achieve current densities of 10 mA·cm⁻² and better long-term stability over 40 hours of continuous operation compared to the undoped counterpart. The significantly enhanced HER performance is comprehensively attributed to the combined contributions of optimized electronic structure, enriched active sites and accelerated charge transfer. Specifically, the cooperative interplay of Cu, Fe, and W with distinct d-band center energies, together with Fe doping-induced electronic modulation, upshifts the d-band center, strengthens the interaction between the catalyst surface and reaction intermediates, and induces the formation of different metal-O bonds for directional electron transfer. Meanwhile, Fe2+ (3d6) in tetrahedral (Cu2O phase) and octahedral (WO3 phase) coordination environments optimizes electron transfer and H* adsorption/desorption behavior via π orbital interactions and electron repulsion with O²-. By exploring the synergistic catalytic activation mechanism of heterojunctions and heteroatom doping, this work provides a theoretical foundation for the rational design of high-efficiency non-noble metal oxide catalysts for neutral water electrolysis.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jiawen Hu,Jieling Liu,Ying Zhang,Xian Wang,Tao Wang,Rongzhou Gong,Yan Nie
Porous carbon materials demonstrate significant potential in electromagnetic wave absorption (EMWA). However, precisely tailoring their composition and microstructure remains a major challenge in developing high-performance electromagnetic wave absorbers. Here, a core-shell Fe-NC@TiO 2 nanocomposite with a dielectric gradient structure is presented, designed to effectively regulate dielectric properties and enhance electromagnetic wave absorption. A combined strategy of hydrothermal synthesis and chemical deposition was developed to achieve the in-situ coating of TiO 2 onto MOFs. Subsequently, a pyrolysis strategy was employed to construct core-shell Fe-NC@TiO 2 nanocomposites. Pyrolysis temperature was used to achieve tunable TiO 2 crystallization while maintaining core-shell architecture. The results indicate that the pyrolysis at 800 °C induces a phase transformation of TiO 2 shell from anatase to rutile, resulting in a high dielectric constant. The core-shell structure effectively optimizes the dielectric dispersion characteristics and impedance matching while improving attenuation performance. The Fe-NC@TiO 2 –800 nanocomposites achieved an effective absorption bandwidth (EAB) of 4.93 GHz at 1.47 mm thickness with 30 wt% filler loading, while simultaneously obtained a remarkable minimum reflection loss ( RL min ) of −50.51 dB at 2.05 mm. This work offers novel insights into the structural design of core-shell nanocomposites with tunable electromagnetic properties and has a broad application prospect in the field of EMWA.
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高影响因子
危险品化学品经营许可证（带存储）