SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Wenhao Zhang,Chuanyi Zhou,Jiahao Cui,Canglou Liu,Yongfang Rao,Wei Yan
Current adsorbents for bisphenol A (BPA) require complex preparation and relatively low adsorption capacities. Here, a high-performance adsorbent (Fe-N-C) was synthesized from iron-modified zeolite imidazole frameworks-8 (ZIF-8) via pyrolysis. With an exceptionally high specific surface area of 1565.15 m 2 ·g −1 , Fe-N-C removed 90% of BPA within 10 min and achieved adsorption equilibrium within 3 h. Furthermore, Fe-N-C exhibited a maximum BPA theoretical adsorption capacity of 877.45 mg·g −1 (288 K). The adsorption kinetics and isotherms conform to pseudo-second-order kinetics and the Langmuir model. Fe-N-C also demonstrated excellent performance across a wide pH range (4–10) and in complex water matrix. The high adsorption capacity was primarily attributed to π-π interactions, along with hydrogen bonding, electrostatic interactions, and hydrophobic interactions. Notably, in addition to efficiently adsorbing BPA, Fe-N-C exhibited a high selectivity toward organic compounds with two benzene rings by π-π interactions, such as bisphenol B (BPB), 2,2-bis (4-aminophenyl) propane (BAPP) and diclofenac (DCF) due to the mediation of graphitized microdomains. This study provides a simple route to prepare high-capacity N-doped carbon adsorbents for the selective and rapid adsorption of specific structural pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Ping-an Yang,Sihao Tan,Haibo Ruan,Li Wang,Xin Huang,Qiqiao Yang,Mengjie Shou,Qiuhong Zhou,Dengfeng Li
s An electromagnetic parameter inversion strategy using a fixed magnetic permeability can effectively predict and guide the design of low-frequency microwave absorption (MA) properties in magnetic/dielectric composite materials. However, permeability instability caused by material modification hinders precise design. To address this issue, this study adopts heterostructure engineering and first uses the experimentally measured permeability of carbon-coated iron nanowires (Fe NWs@C, abbreviated as FC) as a fixed parameter. Through inversion analysis, the target range of dielectric constants required to achieve an effective 3 GHz absorption bandwidth in the low-frequency band was determined. To address susceptibility to permeability fluctuations during dielectric tuning, antiferromagnetic nickel oxide is introduced to construct Fe NWs@C/NiO (abbreviated as FCNO) heterostructures based on FC via co-deposition and laser ablation. Leveraging NiO's antiferromagnetic nature with zero net magnetic moment and its dielectric properties, precise tuning of the dielectric constant was achieved with minimal disturbance to the original magnetic permeability. Experimental results and data analysis indicate that the FCNO1(the atomic molar ratios of Fe:C:Ni =1:1:0.1) absorber exhibits a minimum low-frequency reflection loss of −45.49 dB at a thickness of 4.8 mm, with an effective absorption bandwidth reaching 3.12 GHz at 5.45 mm, consistent with predictions. Furthermore, the FCNO3(the atomic molar ratios of Fe:C:Ni =1:1:0.3) absorber shows only a 2.06% deviation between the predicted and measured frequencies corresponding to its minimum reflection loss, and only a 4.17% deviation in its effective absorption bandwidth. This work proposes an inversion strategy that introduces antiferromagnetic components to achieve dielectric tuning without perturbing magnetic permeability, providing a viable pathway for optimizing the low-frequency MA performance of magnetic/dielectric composite materials.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2026
·
IF 2.6
Xu Xiaobin,Gao Qiang,Ma Yue,Dong Chengwei,Ye Bing,Zhou Fei
M142 aluminum alloy, commonly used in piston systems, exhibits inadequate performance under prolonged high-temperature and high-load conditions. This study developed a TiO 2 nanoparticle-reinforced Ni-Fe composite coating via electrodeposition to address this. The effect of FeSO 4 ·7H 2 O concentration on Ni-Fe coatings was first investigated. The results show that hardness increased with FeSO 4 ·7H 2 O concentration, while the wear rate initially decreased and then increased. Adding TiO 2 nanoparticles effectively mitigated the adverse effects of high Fe content, leading to a dense, homogeneous composite structure (NFT15). Compared to the NF25 coating, the TiO 2 -reinforced coating demonstrated a 19.5% increase in hardness, a 30% improvement in adhesion strength, and a 30.9% decrease in wear rate. It also exhibited superior thermal stability, maintaining structural integrity and showing a 41.7% hardness increase after thermal cycling. Finally, a multi-performance evaluation identified the composite coating with 15 g L −1 TiO 2 as possessing the optimal overall properties.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Lan Zhao,Chunhong Li,Nengcong Pan,Yuhan Lei,Muhammad Aizaz Ud Din,Nanpu Cheng
MOF-derived Fe-doped Ni 9 S 8 nanoparticles are uniformly anchored on N-rGO. • The synergistic effect at the heterointerface enhances electron transfer and active site exposure. • Fe 0.1 -Ni 9 S 8 /N-rGO achieves an overpotential of 255 mV at 50 mA cm −2 . • Fe doping shifts the d-band center down, weakening *O adsorption and lowering the RDS barrier. Developing effective, low-cost oxygen-evolution catalysts is essential for sustainable energy technologies. Here, we synthesized an N-doped reduced graphene oxide-supported, Fe-doped Ni 9 S 8 catalyst (Fe 0.1 -Ni 9 S 8 /N-rGO) by MOF-derived pyrolysis followed by sulfidation. To separate the effects of Fe-induced electronic modulation from N-rGO–assisted interfacial engineering, we prepared a series of control samples: Ni 9 S 8 , Ni 9 S 8 /N-rGO, Fe 0.1 -Ni 9 S 8 , and Fe 0.1 -Ni 9 S 8 /N-rGO. The optimized Fe 0.1 -Ni 9 S 8 /N-rGO exhibited efficient OER electrocatalysis, delivering 50 mA cm −2 at an overpotential of 255 mV with a Tafel slope of 54.58 mV dec −1 . Synergistic Fe doping and the Ni 9 S 8 /N-rGO heterojunction enhanced conductivity and increased active-site exposure, yielding higher activity. Electronic-structure analysis showed that Fe doping shifts the d-band center and tunes the interaction strength with key OER intermediates, which lowered the energy required for oxygen evolution. This work presents a logical strategy for designing high-performance, nonprecious-metal OER catalysts.
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VACUUM
·
2026
·
IF 4.3
Zhipeng Jing,Aimin Liu,Xiaoqing Lu,Zihao Xu,Jinhui Wang,Fengguo Liu,Xianwei Hu,Zhenkun He,Zhongning Shi
Samarium-iron (Sm-Fe) permanent magnets represent a significant class of magnetic materials whose comprehensive magnetic properties are comparable to those of NdFeB magnets, and serve as one of the principal raw materials for producing the fourth-generation rare earth magnetic material SmFeN. In this study, Sm(CF 3 SO 3 ) 3 and FeCl 2 were dissolved in a solvated ionic liquid composed of 1,3-dimethyl-2-imidazolidinone (DMI) and LiNO 3 , and attempts were made to electrodeposit Sm-Fe alloy films at room temperature. The electrochemical behaviors of Sm(III) and Fe(II) in this ionic liquid were investigated using cyclic voltammetry. Furthermore, Sm-Fe films were electrodeposited from a DMI-LiPF 6 -Sm(CF 3 SO 3 ) 3 -FeCl 2 electrolyte, and the influence of deposition potential and metal salt molar ratio on the microscopic morphology of cathodic plating were investigated. The results indicate that the co-deposition of Sm with Fe can be achieved in this system, in which the reduction of Sm(III) proceeds via a two-step mechanism. The reduction of Sm(III) to Sm(II) is a diffusion-controlled irreversible process, with a diffusion coefficient of 5.34 × 10 −9 cm 2 /s at 333 K. The main phase identified in the cathode product was Sm 2 Fe 17 , in which the mass fractions of Sm and Fe were 32.57% and 19.80%, respectively. When the molar ratios of Sm(CF 3 SO 3 ) 3 to FeCl 2 were set at 20:1 and 60:1, Sm-Fe films with smooth and flat surfaces were successfully obtained by electrodeposition at potentials of −2.4 V and −2.6 V (vs. Ag).
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yanmei Chen,Qirtas Malik,Bolun Wang,Yu Wang,Mian Li,Tao Bo,Jianming Xue,Jianxin Zou,Qing Huang
The development of earth-abundant, low-cost, highly active catalysts to accelerate hydrogen absorption/desorption kinetics in Mg-based materials is critical for hydrogen energy applications. Here, we synthesize three MAX phases with nonconventional A-site elements─Nb2FeC, Nb2NiC, and Nb2CuC─and directly incorporate them into MgH2 matrices without hazardous HF etching. All three MgH2-10 wt % Nb2AC (A = Fe, Ni, Cu) composites exhibit a reduction in onset dehydrogenation temperature from 320 °C to approximately 190 °C, and their dehydrogenation temperature and kinetic behavior are markedly superior to Nb2AlC, demonstrating that substituting the A-site element Al with late transition metals substantially enhances catalytic performance toward MgH2 dehydrogenation. Among them, the MgH2-10 wt % Nb2NiC composite shows optimal performance, releasing ∼6.30 wt % H2 at 300 °C within 10 min and absorbing ∼5.01 wt % H2 at 175 °C within 3 min, while maintaining good cyclic stability. Experimental and theoretical results jointly confirm that Nb2NiC functions as an efficient electron-mediated catalyst, weakening Mg–H bonds and promoting H2 dissociation via interfacial electron transfer, thus significantly improving hydrogen storage kinetics.
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Xuejing Zhao,Ping Li,Chengbin Wang,Kaicai Fan,Bin Li,Zhenyu Xiao,Porun Liu,Zumin Wang,Lei Wang,Lingbo Zong
Addressing the bottlenecks of catalytic efficiency and cost in clean energy conversion and electrochemical synthesis is critical for low-carbon technology advancement. Herein, we design an iron single atom supported on an inverse opal-structured carbon support (Fe-N-C io ), featuring unique hierarchical pores (micropores, mesopores, macropores) and an interlayer-confined microenvironment that synergistically enhances mass transfer and modulates the electronic structure of Fe-N 4 active sites. We demonstrate that the confined microenvironment in bilayer graphene downshifts the Fe d -band center, weakening the binding strength of oxygen intermediates, favoring O–O bond cleavage and reducing the rate-determining step energy barrier (O* → OH*). Consequently, Fe-N-C io outperforms commercial Pt/C, achieving a half-wave potential ( E 1 / 2 ) of 0.91 V with only 7.87 mV decay after 100,000 cycles. In practical device applications, the aqueous zinc-air batteries (A-ZABs) assembled with Fe-N-C io achieve stable operation for over 1200 h, with a voltage gap change of only 20 mV. The quasi-solid-state zinc-air batteries (QSS-ZABs) exhibit an OCV of 1.48 V, a large peak power density of up to 207.73 mW cm −2 , and also cycling durability for 160 h. In chlor-alkali electrolysis systems, the Fe-N-C io ||RuO 2 chlor-alkali flow cell operates at 1.66 V (80 °C, 300 mA cm −2 ) with stable performance for over 110 h. This work validates the application potential of Fe-N-C io in energy conversion and industrial electrochemistry, while systematically elucidating the regulatory mechanism of the interlayer-constrained microenvironment on single-atom catalyst’s performance, which provides a paradigm for designing high-efficiency non-precious metal catalysts. Interlayer-confined Fe-N 4 sites optimize electronic modulation, and the hierarchical porous carbon accelerates mass transport, thus enhancing the oxygen reduction reaction. Download: Download high-res image (351KB) Download: Download full-size image
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Molecular Catalysis
·
2026
·
IF 4.3
Chao Wang,Ting Fan,Shunfang Lv,Tianfu Zhang,Juan Zhang,Jiangang Chen
A series of hydrophobically modified MnO 2 -coated Fe 3 O 4 (Fe@Mn) catalysts were prepared to investigate the effect of the interaction strength between Fe@Mn and hydrophobically modified SiO 2 (SiO 2 -c) on their physicochemical properties, FTS performance and CO 2 selectivity, including granule mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (g)), powder mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (p)) and core-shell structure of Fe@Mn@SiO 2 -c. The interaction between Fe@Mn and SiO 2 -c evolves and strengthens with the structural progression from physically mixed to core-shell configurations. Contact angle measurements indicate that Fe@Mn@SiO 2 -c exhibits superior hydrophobicity compared to Fe@Mn+SiO 2 -c (g/p). Fe@Mn+SiO 2 -c (g/p) maintains a CO 2 selectivity comparable to that of Fe@Mn, while exhibiting significantly enhanced stability. Although Fe@Mn@SiO 2 -c shows a relatively lower CO conversion, it achieves the lowest CO 2 selectivity alongside a higher selectivity for light olefins. The study reveals that the altered surface microenvironment of Fe@Mn@SiO 2 -c is the key factor in suppressing the water-gas shift (WGS) reaction activity during FTS, thereby reducing CO 2 selectivity. This work elucidates the underlying mechanism by which the interaction mode between the Fe-based catalyst and the hydrophobic material influences the FTS performance, particularly the CO 2 selectivity.
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JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Gu Jianlong,Gao Li,Cai Jieyun,Liu Yuchen,Meng Hongming,Long Jie,Ma Jing,Yang Bing,Wang Chunqiong,Yang Yaling
Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K 3 [Fe(CN) 6 ]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg 2+ ) was developed by leveraging the enhancing effect of Mg 2+ on the CL signal in this system. The proposed CL technique for Mg 2+ demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg 2+ in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg 2+ CL detection.
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ENERGY & FUELS
·
2026
·Vol. 40
·期 29
·16000-16012
·
IF 6
Zhang Wenxia,Zhang Juan,Ding Huiping,Wang Rongyu,Chen Jiangang
A series of Fe/ZrO 2 Fischer–Tropsch
synthesis
catalysts were prepared via a solid-state grinding method assisted
by citric acid ligands, aiming to enhance the dispersion of active
metal and tailor the metal–support interfacial structure through
a green, solvent-free synthesis strategy, thereby optimizing catalytic
performance. In this study, citric acid (CA) was used as the ligand
and a series of Fe/ZrO 2 catalysts were synthesized by varying
the CA/Fe molar ratio (0, 0.25:1, 0.5:1, 1:1, and 2:1) to systematically
investigate the effect of ligand dosage on the transformation of active
Fe phases and Fischer–Tropsch performance. The structure–performance
relationship was elucidated using XRD, TEM, BET, XPS, H 2 -TPR, and Mössbauer spectroscopy. Results revealed that an
appropriate CA dosage (1:1) significantly improved the dispersion
of Fe nanoparticles, promoted the formation of Fe–O–Zr
interfacial structures and oxygen vacancies, lowered the reduction
temperature of FeO x species, and enhanced
CO adsorption capacity. These factors collectively facilitated the
formation of a high content of the χ-Fe 5 C 2 active phase, resulting in the highest CO conversion and C 5+ hydrocarbon selectivity. The catalyst with a CA/Fe molar ratio of
1:1 exhibited the best performance, achieving a steady-state CO conversion
of 42.6% and a C 5+ selectivity of 46.5% after 192 h on
stream, which are significantly higher than those of the unmodified
catalyst (CO conversion 23.2%, C 5+ selectivity 36.4%).
In contrast, insufficient CA dosage (0.25:1, 0.5:1) led to nonuniform
dispersion of Fe species on the support surface, reduced surface area,
and limited interfacial synergy. Excessive CA (2:1), although maintaining
high dispersion, could impede the reduction pathway and cause unfavorable
structural evolution, ultimately reducing catalytic performance. Overall,
the study demonstrates the existence of an optimal CA dosage window,
with the 1:1 molar ratio condition achieving synergistic optimization
of Fe electronic structure and interfacial activity, leading to high
CO conversion in Fischer–Tropsch synthesis. These findings
provide robust experimental evidence for the application of organic
ligand-assisted green synthesis strategies in controlling the active
phase transformation and performance optimization of iron-based catalysts,
as well as offering new insights and approaches for the design of
green and efficient Fischer–Tropsch synthesis catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Cheng Gu,Yakun Qu,Ya Chen,Yunlong Wang,Chaowen Liu,Le Zhang,Xiangyang Cui,Xiaoguang Zhao,Enhui Xing,Yibin Luo,Zhen Chen,Junhua Li
Framework Fe-ZSM−5 was developed for catalytic CO 2 desorption from MEA. • Isolated tetrahedral Fe 3+ sites were incorporated into the MFI framework. • Framework Fe reduced Fe dissolution in MEA by more than 88% over 120 °C for 15 days. • Fe-ZSM−5 increased the average CO 2 desorption rate by 35% over the blank case under continuous operation. • Lewis acid-base pairs promote H 2 O-assisted carbamate decomposition. Catalytic CO 2 desorption from aqueous amine solvent is a promising strategy for energy-saving CO 2 capture from industrial flue gas. As an important candidate, conventional zeolite catalysts often suffer from insufficient activity, while metal incorporation can effectively regulate acidity but also causes metal-site dissolution. Herein, we prepared an excellent ZSM-5 zeolite with framework-incorporated Fe (Fe-ZSM−5) through feasible hydrothermal method. The coordination characterizations confirm that Fe-ZSM−5 contains isolated, tetrahedrally coordinated Fe 3 + within the MFI framework. Compared to impregnated Fe, the dissolution rate of framework Fe species in ethanolamine absorbent was reduced by more than 88%, which can effectively enhance catalytic performance and simultaneously avoid solvent degradation. Meanwhile, the incorporation of framework Fe modifies the acidic environment of the zeolite by generating Si-OH-Fe Brønsted acid sites and Fe-related Lewis acid sites. Fe-ZSM−5 exhibited high catalytic activity for CO 2 -rich MEA solution, with a peak desorption rate of 4.306 mmol·min −1 (48% higher than the blank case); the catalytic rate constants reach 2.0–2.4 × 10 −4 min −1 . This work proposes a novel design strategy for high-performance acid catalysts, representing a durable and efficient catalyst for reducing regeneration energy in amine-based CO 2 capture. Download: Download high-res image (299KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zhenfei Li,Haoteng Yuan,Chenzhao Liu,Anas Mousa,Liyuan Fan,Dong Yan,Bin Hua,Lichao Jia
The practical deployment of reversible protonic ceramic cells requires oxygen electrodes that can operate efficiently and reversibly without relying on cobalt- and strontium-containing perovskites, that often suffer from thermal mismatch, surface segregation, and durability degradation. Here, we report a Sr/Co-free Ba/Fe co-doped Ruddlesden–Popper nickelate, Pr 1.8 Ba 0.2 Ni 0.9 Fe 0.1 O 4+δ (PBNF0.1), as an efficient and stable oxygen electrode. Ba incorporation stabilizes the layered Pr 2 NiO 4+δ framework, while Fe substitution regulates the Ni valence state, promotes oxygen-vacancy formation, and enhances hydration capability, thereby improving oxygen-electrode kinetics. Consequently, PBNF0.1 exhibits reduced polarization resistance compared with Pr 1.8 Ba 0.2 NiO 4+δ (PBN) and delivers excellent reversiblecell performance, achieving 1.28 W cm −2 in fuel-cell mode and −2.47 A cm −2 at 1.3 V in electrolysis mode at 700 °C. Stable operation under fuel-cell, electrolysis, and reversible cycling conditions further highlights Ba/Fe co-doping as an effective strategy for durable Sr/Co-free oxygen electrodes.
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