Materials Today Physics
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2026
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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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CHEMICAL ENGINEERING JOURNAL
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2022
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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 CATALYSIS
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2018
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IF 6.759
Hong Zhang,Shuang Ni,Yongli Mi,Xiaoxiang Xu
Doping techniques generally serve as effective means for tailoring the physicochemical properties of a target compound. In this work, we successfully co-doped La/Fe into Ruddlesden-Popper (RP) compound Sr 2 TiO 4 and performed a detailed investigation on the crystal structure, morphology, optical absorption and photocatalytic hydrogen production reactions after doping. Our findings suggest that La/Fe co-doping slightly expand the unit cell of Sr 2 TiO 4 while maintains the structure lamination. Incorporating La/Fe into Sr 2 TiO 4 efficiently reduces the band gap and the level of band gap reduction can be controlled by varying the amounts of dopants. La/Fe co-doping significantly improves the photocatalytic properties of Sr 2 TiO 4 under both full range (λ ≥ 250 nm) and visible light illumination (λ ≥ 420 nm). A fivefold enhancement in hydrogen production rate (∼106.2 μmol/h) is seen in sample Sr 1.9 La 0.1 Ti 0.9 Fe 0.1 O 4 (x = 0.1). Efficient photocatalytic hydrogen production under visible light illumination (λ ≥ 420 nm) is also achieved in sample Sr 1.7 La 0.3 Ti 0.7 Fe 0.3 O 4 (x = 0.3) with AQE as high as ∼1.18% at 420 nm. DFT calculations confirm the critical role of Fe in reducing the band gap of Sr 2 TiO 4 by forming additional spin-polarized bands (SPB). The anisotropic charge transportation in Sr 2 TiO 4 is also verified by our calculations as both conduction band minimum (CBM) and valence band maximum (VBM) are buried in TiO 6 octahedron layers. The 2D charge transportation properties are particularly useful for photocatalytic reactions since interlayer charge recombination is essentially prevented.
研究领域:
材料科学
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光催化
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能源材料
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固态化学
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2026
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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
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2022
·Vol. 15
·期 16
·5652
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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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INORGANIC CHEMISTRY
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2026
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IF 4.6
Guirong Duan,Jie Jiang,Yanqing Jiao,Jiaqi Wang,Xi Zhao,Ganceng Yang,Haijing Yan,Honggang Fu
Developing low-cost, corrosion-resistant catalytic electrodes for the oxygen evolution reaction (OER) is essential for efficient and durable hydrogen production via anion exchange membrane water electrolysis (AEMWE). Herein, we report a polydopamine (PDA)-coated Fe,Cr codoped NiS2 self-supporting electrode (PDA-Fe,Cr-NiS2@NF). The nitrogen-rich functional groups of PDA establish robust M-N coordination bonds with active metal centers, thereby suppressing metal dissolution during anodic reconstruction. In parallel, the conductive PDA layer regulates interfacial electron redistribution and optimizes the hydrogen-bond network of interfacial water, lowering the OER activation energy. Its conformal protective layer further enhances catalyst stability. The optimized electrode delivers an OER overpotential of only 247 mV at 1 A cm–2. When integrated as the anode with a PtNiC cathode in an AEMWE cell, the system reaches a current density of 1 A cm–2 at only 1.737 V at 70 °C and operates stably for 1000 h, with a voltage decay rate of only 0.1 mV h–1, an electrolysis efficiency of 71.96%, and an energy consumption of 4.157 kWh Nm3– H2. This work establishes a viable coordination-protection strategy for constructing durable, high-performance OER electrodes for industrial-scale water electrolysis.
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ACS Sensors
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2026
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IF 10.9
Fan Shi,Shu Deng,Lianjin Jiang,Jidie Tao,Yongfa He,Jinju Zuo,Brij Mohan,Wei Sun,Qiantao Ma
Chlorogenic acid (CGA) has antibacterial, antiviral, and antioxidant properties, making its detection essential in food science, pharma, and environmental monitoring. Nevertheless, the mechanistic understanding of CGA recognition and redox behavior at electrochemical sensor interfaces remains limited, posing a key scientific challenge. Herein, a novel Fe-N4 diatomic-site carbon nanomaterial is prepared via in situ pyrolysis of coffee grounds, which served as a simultaneous precursor for carbon, iron, and nitrogen. Aberration-corrected scanning transmission electron microscopy confirms single-atom dispersed iron with diatomic active sites. At the same time, X-ray absorption near-edge structure and extended X-ray absorption fine structure analyses reveal a Fe–N4 coordination. Density functional theory calculations indicate that during CGA oxidation, hydroxyl oxygen atoms preferentially adopt a side-adsorption configuration at dual active sites, thereby enhancing interfacial electron transfer and catalytic selectivity. The constructed electrochemical sensor exhibits two linear response ranges, 0.2−0.8 and 0.8−500.0 μmol/L, with a detection limit of 0.067 μmol/L (LOD = 3 s/m). Overall, this study presents a sensitive, cost-effective electrochemical sensor for CGA detection and highlights the critical role of adsorption configuration in determining the performance of single-atom catalysts.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Kai Liu,Ziling Liu,Tuanhui Li,Wasim Afzal Muhammad,Xue Liu,Dongbin Dang,Yan Bai
Developing highly efficient single-atom catalysts (SACs) with optimal active-site utilization remains challenging. In this study, a hollow macroporous-mesoporous catalyst composed of iron single atoms supported on nitrogen-doped carbon (Fe/NC) was synthesized using silica microspheres as a sacrificial template and dopamine hydrochloride as a bifunctional C/N source and iron-anchoring ligand, and applied to the CO 2 cycloaddition reaction. According to the experimental results, the Fe/NC catalyst demonstrates exceptional performance in the cycloaddition reaction of styrene oxide with CO 2 , achieving a high yield of 97.45 ± 0.33% (turnover frequency (TOF) = 38.19 h −1 ), despite having an extremely low iron loading of only 1.36 ± 0.01 wt%. This is attributed not only to the superior intrinsic catalytic activity of the Fe N 4 active sites but also to the hollow mesoporous structure with a high specific surface area, which provides stable metal anchoring sites to effectively suppress iron atom aggregation, promotes continuous release of substrates and CO 2 , enhances product diffusion, and thereby improves catalytic efficiency. In addition, the Fe/NC catalyst demonstrates excellent cycling stability, maintaining a high conversion efficiency of 93.26 ± 0.52% after five consecutive recycling tests while preserving its structural integrity. Moreover, the Fe/NC catalyst exhibits broad substrate compatibility. This work provides a theoretical basis for synthesizing porous C/N materials with single-atom loading to achieve efficient catalytic conversion of carbon dioxide Download: Download high-res image (139KB) Download: Download full-size image
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CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 5.1
Shijie Liu,Yanan Liu,Xiaocui Wei,Fu Zhao,Tingyuan Wang,Yigui Du,Enshen Shi,Fenglong Dai,Chunjia Wang,Chunyang Fan,Yuhan Wang,Zhongyi Jiang
The antifouling property of membrane is important for wastewater treatment, and surface segregation, as a bioinspired in-situ membrane construction approach enabling simultaneous modification of external membrane and internal pore surfaces, has been increasingly applied to improve membrane antifouling ability. Herein, a complexation enhanced surface segregation method is proposed to construct antifouling membrane for oil/water separation, with tannic acid (TA) as the surface segregation agent in casting solution and Fe 3+ as the crosslinking agent in coagulation bath. During the phase inversion process, TA spontaneously segregates toward the membrane surface to form the hydrophilic crosslinked separation layer through the complexation with Fe 3+ . Accordingly, the membrane exhibits the water permeance of 251 L m − 2 h − 1 bar −1 with oil rejection of over 99.7%. Moreover, hydrophilic crosslinked separation layer endows the membrane with enhanced hydrophilicity, underwater superoleophobicity and low oil adhesion as well as outstanding antifouling performance with water recovery ratio (FRR) of 95.7% for surfactant-stabilized pump oil-in-water emulsion. Meanwhile, the membrane presents effective antifouling ability in pH range of 3–11 and after prolonged aqueous immersion. Furthermore, after five-cycle filtration experiment, the membrane still maintains FRR of 90.2%. Our study provides a simple approach to constructing antifouling membrane through integrating surface segregation with complexation of TA and Fe 3+ .
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·123941
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IF 7.5
Mengyuan Yang,Yanling Li,Temitope Fausat Ajibade,Ziang Zhou,Zhaoping Cai,Lixiang Li,Huali Tian
Covalent organic frameworks (COFs) are effective materials for water treatment membranes due to their tunable pore structures and high compatibility. While composite modification strategies combining plant polyphenol tannic acid (TA)-Fe³⁺ and COFs show great promise for TFC membranes, they typically involve organic solvents or complex pre-modification of the fillers. In this study, a green, fully-aqueous layer-by-layer (LbL) self-assembly strategy was employed to prepare TA-Fe(COF-LZU1)/PES membranes. By exploiting the inherent synergy between the rigid crystalline channels of COF-LZU1 and the adhesive TA-Fe network, this approach directly utilizes pristine COF-LZU1 without secondary modification. Unlike conventional methods, the entire process avoids organic solvents, offering a highly sustainable technical alternative. The incorporation of COF-LZU1 significantly enhanced the membrane surface properties, with surface roughness increasing from 17.0 ± 2.2 nm to 43.8 ± 8.5 nm and the water contact angle decreasing from 77.0 ± 1.6° to 20.0 ± 1.0°, thereby substantially improving the membrane’s hydrophilicity. The TA-Fe(COF-LZU1)/PES membrane achieved a pure water permeance of 35.85 L·m - ²·h - ¹·bar - ¹, representing a 11.5% increase over the TA-Fe/PES membrane. It exhibited excellent separation performance, achieving high rejections of 98.3% for Direct Red 80, and further demonstrated robust stability in mixed dye/salt solutions. In five-cycle bovine serum albumin (BSA) tests, the membrane exhibited improved antifouling durability, yielding a flux recovery ratio of 75.5%. Additionally, it operated stably across a pH range of 4–8. This green self-assembly approach provides a practical strategy for preparing composite membranes for dye wastewater treatment.
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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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Journal of Environmental Chemical Engineering
·
2026
·
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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