JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2025
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IF 3.8
Yan Wang,Tengfei Deng
A series of ferrite ceramics with the chemical formula Fe(Cr x Fe 2− x )O 4 ( x = 1.5, 1.6, 1.7, 1.8, 1.9) were synthesized using the solid-state reaction method. Rietveld refinement of the x-ray diffraction patterns confirmed the formation of a pure cubic spinel structure, with the lattice parameters decreasing as the Cr 3+ content ( x ) increased. Raman spectroscopy revealed the splitting of the A 1 g ${{{\mathrm{A}}}_{1{\mathrm{g}}}}$ vibrational mode into two distinct bands at 670 and 710 cm −1 that were attributed to the symmetric stretching vibrations of Fe 2+ –O and Fe 3+ –O bonds, respectively. This supports a mixed spinel-type cation distribution in which Cr 3+ and a fraction of Fe 2+ ions occupy octahedral sites, whereas Fe 3+ and the remaining Fe 2+ ions occupy tetrahedral sites. With increasing chromium content, the dielectric constant and loss tangent both decreased. Magnetic measurements showed a reduction in the remnant magnetization and coercivity. Furthermore, the samples demonstrate behavior that tends toward a superparamagnetic response. This study systematically established the relationship between the Cr/Fe ratio and the resulting structural, dielectric, and magnetic properties, underscoring the important role played by cation distribution in tuning the material properties of these ferrite ceramics.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 30
·1-21
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IF 2.8
Yang Minjie,Zou Congyang,Ji Yufeng,Liu Ruijie,Xu Ying
A novel MIL-101(Fe)/Bi₂S₃ Z-scheme heterojunction with a metal–organic framework (MOF) structure was synthesized via a solvothermal method. Compared with pristine MIL-101(Fe) and pristine Bi₂S₃, this composite exhibits a significant breakthrough in degradation performance toward rhodamine B (RhB) and tetracycline hydrochloride (TCH). Specifically, it achieves a degradation efficiency of 95.7% for 20 mg/L TCH within 120 min and 98.6% for 40 mg/L RhB within 90 min.Characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and electrochemical impedance spectroscopy (EIS) confirm that the MOF structure of MIL-101(Fe) provides a stable support matrix for Bi₂S₃. Moreover, the construction of the Z-scheme heterojunction can effectively suppress the recombination of photogenerated electron–hole pairs while retaining the strongly oxidizing hydroxyl radicals (・OH) and strongly reducing superoxide radicals (・O₂⁻). More importantly, after five recycling cycles, the degradation efficiencies of the composite for TCH and RhB remain at 86.8% and 88.6%, respectively, with no obvious damage to its crystal structure after cycling. This demonstrates superior structural stability and reusability compared to most reported MOF-based photo-Fenton catalysts.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Xing Wei,Yaling Ye,Wanling Cai,Zuliang Chen
Antibiotics like doxorubicin hydrochloride (DOX) are widely used in medicine, but their environmental residues pose risks to human health and ecosystems. This study optimized the synthesis of C-Fe₃O₄@ZIF-8 composites using response surface methodology (RSM) to enhance DOX release efficiency, thereby mitigating environmental antibiotic contamination. Under optimized conditions (37 °C, pH 5.0), the C-Fe₃O₄@ZIF-8 composite achieved a significant increase in cumulative DOX release, from 40.8% to 61.1%. The pH-responsive release further validated the optimization strategy. Characterization via scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed a structural transformation from rhombic dodecahedral crystals to more stable spherical particles with enhanced crystallinity. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed an increase in surface-active sites and oxygen-containing functional groups, contributing to improved drug release efficiency. These findings provide valuable insights into optimizing C-Fe₃O₄@ZIF-8 for drug delivery, advancing environmentally friendly antibiotic management strategies.
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Journal of Energy Storage
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2025
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IF 9.8
Jianchi Wang,Xusheng Cheng,Liwei Wang
All-soluble all-iron redox flow batteries (RFBs) are among the most promising energy storage technologies due to their low cost, dendrite-free operation, and decoupled capacity and power. In particular, the Fe(TEA) 3+/2+ redox couple has attracted significant attention owing to its appropriate redox potential, fast kinetics, and excellent reversibility. However, the instability of Fe(TEA) chelates, caused by the competitive adsorption of free TEA ligands, remains a major challenge that limits cycling stability and energy efficiency. Herein, we propose a green and efficient strategy to fabricate Nitrogen-doped graphite felt (N@GF) as the anode for the Fe(TEA)-based system and identify the optimal doping concentration. The abundant nitrogen-containing functional groups endow the felt with synergistic electronic modulation and surface coordination capabilities, enabling selective Fe(TEA) complexation while suppressing the undesired adsorption of free TEA ligands by occupying the limited active sites. This tailored interfacial regulation stabilizes Fe(TEA) complexes and enhances charge-transfer efficiency. As a result, the battery employing 5 %N@GF as the anode operates stably for over 950 deep charge–discharge cycles (near 260 h) at 80 mA cm −2 , exhibits significantly reduced polarization compared to pristine GF, achieves a peak energy efficiency above 78 % and a capacity utilization exceeding 83 %. This work offers an eco-friendly and effective material design strategy for improving both the energy efficiency and cycle life of all-soluble all-iron redox flow batteries.
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CHEMOSPHERE
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2021
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IF 7.086
Fangru He,Hejun Ren,Tingting Li,Shuai Liu,Rui Zhou
This work demonstrated a novel N , N -bis(carboxymethyl)glutamic acid (GLDA) modified visible (vis) light assisted Fenton–like system which could effectively removal ciprofloxacin (CIP) at neutral pH. The removal rate of CIP in the GLDA/Fe(III)/H 2 O 2 /vis system was 97.9% within 120 min and was approximately twice as high as that in the Fe(III)/H 2 O 2 /vis system. GLDA could significantly accelerate the Fe(III)/Fe(II) cycle under visible light irradiation. Radical scavenging experiments demonstrated that 74.2% of the Fe(II) in the GLDA/Fe(III)/H 2 O 2 /vis system originated from the ligand–to–metal charge transfer reaction between Fe(III) and GLDA. The hydroxyl radical was the dominant species for CIP degradation. H 2 O 2 utilization kinetic modeling exhibited that 90.1% of H 2 O 2 was used for CIP mineralization. The effects of experimental parameters and coexisting substances on the removal of CIP in the Fe(III)/GLDA/H 2 O 2 /vis system were investigated in detail. The intermediate products of CIP were explored via the high–performance liquid chromatography-mass spectrometry.
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OPTICAL MATERIALS
·
2021
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IF 3.08
Qianwen Li,Limei Li,Xuanyu Long,Yu Tu,Lanqing Ling,Jiabao Gu,Liwei Hou,Yi Xu,Nan Liu,Zequan Li
Photocatalysis provides an exciting way to directly utilize solar energy to degrade environmental pollution. This process, however, suffers from rapid recombination of the photogenerated charges leading to low efficiency and instability. Herein, we report a novel MIL-88A(Fe)/Bi 2 WO 6 heterojunction as a highly efficient photocatalyst for degradation of organic compounds under visible-light irradiation. When tested in 10 mg/L Rhodamine B (RhB), such catalyst can get remarkable degradation efficiency, up to 96%, at 50 min visible-light irradiation time. Significantly, it also shows super performance for Tetracycline (TC). Moreover, MIL-88A(Fe)/Bi 2 WO 6 exhibited excellent photostability and recyclability. The superior photocatalytic activity of MIL-88A(Fe)/Bi 2 WO 6 may be the formation of a heterojunction between MIL-88A(Fe) and Bi 2 WO 6 with high surface area, which provides abundant active sites to drastically promote interactions between photocatalyst and reactants. Furthermore, the related electrochemical analysis and free radicals trapping experiments indicated that both •O 2 − and h + have significant effect in the degradation process. Our findings of the work not only provide a novel insight to the design and develop MOF-based heterojunction photocatalysts but also suggest its great potential application value for environmental remediation.
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Scientific Reports
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2026
·Vol. 16
·期 1
·7837
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IF 4.9
Abou-Elyazed Ahmed S.,Genena Eman E.,El-Sayed Ibrahim E. T.,Abdel-Bary Hamed M.,Tony Maha A.
The photocatalytic Fenton oxidation reaction of paracetamol (PCT), as a widely used pharmaceutical and persistent water contaminant, was investigated using RTG-MIL-100(Fe) framework, prepared via a KI-assisted, solvent free, room temperature synthesis, in the presence of H₂O₂ under UV irradiation. The mild conditions synthesis of RTG-MIL-100(Fe) is investigated, and the material is comprehensively assessed through characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer–Emmett–Teller (BET), and X-ray Photoelectron Spectroscopy (XPS). The catalytic system is introduced as a source of photo-Fenton-like reaction and demonstrated a dual mechanistic pathway involving both semiconductor-like photoexcitation and open metal site (OMS) activation. The operating Fenton parameters are optimized and the experimental research revealed that the reaction is working at the room temperature using 400 ppm H₂O₂, 20 mg/L of RTG-MIL-100(Fe)at natural pH of wastewater (5.5) and the PCT reached almost complete removal 99.6%. The synergistic interaction of photogenerated charge carriers and OMS-driven Fenton-like processes resulted in efficient oxidative mineralization of PCT to CO₂ and H₂O. Furthermore, the reaction is endothermic in nature and following the first order reaction kinetics. These findings highlight the potential of KI-modified MOF-based photo-Fenton catalysts as sustainable and robust materials for the treatment of pharmaceutical wastewater.
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PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
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IF 7.9
Dongsheng Zhang,Rui Yang,Ting Wu,Wangbo Wang,Yizhou Feng,Weihuang Zhu
Single-atom catalysts (SACs) have attracted considerable interest in heterogeneous Fenton-like reactions (HTFR). However, their efficiency and practical applicability require further improvement. To address this, an S-doping strategy was employed, using zeolitic imidazolate framework-8 (ZIF-8) as a precursor to fabricate Fe-based SACs (Fe-SNC) for peroxymonosulfate (PMS) activation. X-ray absorption fine structure (XAFS) analysis confirmed the coordination of atomically dispersed Fe to N and S atoms, forming a Fe–N 2 S 2 configuration. In a separate adsorption test, Fe-SNC achieved 93.1% removal of tetracycline (TC). Furthermore, TC could be removed within 40 min during PMS-based HTFR catalyzed by Fe-SNC, exhibiting significantly high performance compared to the pristine Fe-NC catalyst. Additionally, the activation energy for PMS activation was decreased to 2.87 kJ/mol with Fe-SNC, which is only 26.16% of that required for Fe-NC (10.97 kJ/mol). The superior performance of Fe-SNC is attributed to its enhanced adsorption capacity and high PMS activation ability. Density functional theory (DFT) calculations further revealed that S-doping significantly enhanced the adsorption energy between catalyst and PMS to -2.95 eV. It also promoted the elongation of O–O (1.477 Å) and S–O (1.873 Å) bonds, while facilitating charge transfer of 0.79 e. The galvanic oxidation process (GOP) also demonstrated that the electron transfer process played a key role during the PMS-based HTFR catalyzed by Fe-SNC. The quenching experiments and EPR tests further confirmed that the 1 O 2 and Fe(IV)=O were the primary reactive species. This work provides insightful perspectives for the rational design of highly efficient SACs for HTFR.
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ENVIRONMENTAL RESEARCH
·
2026
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IF 8.2
Lin Yue,Shiqi Xing,Mengfei Wang,Hongxue An,Yunlong Yao,Yuxuan Li,Jing Lian
In this paper, the bimetallic zeolite imidazolate framework Ce-Fe-MI as a high-performance catalyst for ozonation-based degradation of tetracycline (TC) was investigated. During the catalytic process, electron transfer occurred between the two metal ions on the catalyst, and the mixed-valence state induced charge imbalance and unsaturated bonds, thereby forming catalytically active sites. Through comprehensive characterization and experimental evaluation, the Ce-Fe-MI catalytic ozonation process significantly enhanced the removal efficiency of COD and TOC, achieving a mineralization rate of 50% higher than ozonation alone. EPR identified the presence of uperoxide radicals (•O 2 - ) and singlet oxygen ( 1 O 2 ) as the main active species; however, quantitative analysis revealed hydroxyl radicals (•OH) was the main contributor to the degradation of pollutants, indicating the involvement of all three reactive oxygen species (ROS) in the catalytic ozonation reaction process. Density functional theory (DFT) calculations further demonstrated that the synergistic Ce-Fe interactions promoted electron transfer and facilitated ozone activation, leading to enhanced generation of reactive oxygen species. These findings emphasize the potential of Ce-Fe-MI catalyzed O 3 as an efficient and advanced oxidation process for antibiotic wastewater treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Lin Luo,Zhiyuan Liu,Yue Pan,Tao Xu,Ang Xiao,Baolong Jiang,Weiting Yang,Yida Deng
To overcome the shortcomings of epoxy coatings in inadequate long-term barrier properties and lack of active corrosion inhibition at defect sites, we developed a self-healing epoxy coating by incorporating a MIL-100(Fe) nanocomposite loaded with benzotriazole (BTA), which was synthesized using solvothermal and solution impregnation methods. This multifunctional system provides robust barrier protection and alkaline-triggered self-healing capabilities. The composite enables alkaline-triggered BTA release, forming a protective film at damaged sites. The synthesized MIL-100@BTA nanocomposite exhibits a high surface area, thermal stability, and controlled BTA release. In simulated seawater, the MIL-100@BTA/EP coating maintained a low-frequency impedance modulus of 5.03 × 10⁹ Ω·cm² after 50 days, significantly outperforming pure epoxy. Scratch tests, electrochemical tests, scanning electron microscopy (SEM) and electron dispersive spectrum (EDS) analyses confirmed that the released BTA inhibits corrosion by forming a protective film at defect sites. This work presents an effective strategy for engineering high-performance and self-healing coatings.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Quanhui Hou,Qianyang Wang,Xiao Xu,Zhihao Xu,Peng Jiang,Maziar Ashuri,Yunxuan Zhou,Zhao Ding
Developing efficient and scalable catalysts remains crucial for advancing practical MgH 2 -based solid-state hydrogen storage. In this work, an oxide-precatalyst strategy is proposed, where Fe 3 O 4 nanoparticles are uniformly anchored on leaf-derived porous carbon to form a Fe 3 O 4 /leaf-carbon catalyst that converts in situ into highly dispersed Fe/MgO interfaces during the initial dehydrogenation process. The resultant MgH 2 + 10 wt% Fe 3 O 4 /leaf-carbon composite exhibits a markedly improved hydrogen sorption performance, with an onset desorption temperature of 215 °C, releasing 6.41 wt% H 2 within 8 min at 350 °C, and reabsorbing 6.22 wt% H 2 at 175 °C (3 MPa) within 1 h. Notably, the activation energies for hydrogenation and dehydrogenation are drastically reduced to 53.27 kJ mol −1 and 91.45 kJ mol −1 , respectively. Furthermore, after undergoing 20 consecutive adsorption cycles, this composite material still maintained 96.3 % of its hydrogen storage capacity compared to the initial hydrogen absorption. Structural characterizations confirm that Fe 3 O 4 is reduced to Fe while forming a stable Fe/MgO heterointerface that provides abundant active sites and accelerates hydrogen diffusion. This study elucidates the oxide-to-metal interface transformation mechanism as an effective pathway to simultaneously lower thermodynamic barriers and enhance kinetic reversibility, offering a cost-effective and sustainable strategy for engineering next-generation MgH 2 -based hydrogen storage materials.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
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IF 19
Mingjie Lei,Yi Zhao,Xiujuan Sun,Yuan Pan,Yadong Liu,Jiayu Kang,Diye Wei,Luyi Zou,Yong Pei
Electrocatalytic urea oxidation reaction (UOR) holds great promise in green energy conversion and pollutant degradation with low energy-consumption. Herein, Fe-NiTe/NiSe 2 nanosheets array with super-hydrophilic/aerophobic surface and enhanced built-in electric field is constructed. The surface hydrophilic/aerophobic properties enabling rapid bubble nucleation and efficient detachment, liberating covered active sites, thus improving the surface adsorption kinetics of urea molecular and OH − . Moreover, Fe incorporation accelerates charge transfer and modulates the built-in electric field at the NiTe/NiSe 2 heterojunction interface. This reduces the surface reconstruction potential and optimizes the occupancy of hybrid anti-bonding (d-δ)* orbitals, leading to the formation of electron-rich region (Fe-NiTe) and electron-deficient region (Fe-NiSe 2 ), which preferentially adsorbs the electron-withdrawing (C═O) and electron-donating (─NH 2 ) groups of urea, respectively, thereby optimizing the adsorption energy of urea molecules. Therefore, the Fe-NiTe/NiSe 2 heterojunction exhibits excellent alkaline UOR performance, requiring only 1.447 V RHE to deliver a current density of 100 mA cm −2 , which it can maintain for over 90 h. The Fe-NiTe/NiSe 2 (+) ∥ Pt/C (-) urea electrolyzer can maintain stable for 150 h at 100 mA cm −2 . This work offers a macro- and microscopic coupling engineering strategy to address the surface and intrinsic properties for alkaline UOR, holding significant practical value for advancing energy-efficient hydrogen production and wastewater treatment.
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