Journal of Water Process Engineering
·
2026
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IF 6.6
Lei Fang,Yuman Lv,Xinlei Liu,Shijie Wang,Miaomiao Ye
An iron–copper bimetallic biochar catalyst (Fe-Cu@BC) was synthesized to establish a heterogeneous peroxymonosulfate (PMS) activation system aimed at improving the removal of typical organic pollutants in drinking water sources. The physicochemical properties of the catalyst, the catalytic performance, reactive species generation, pollutant degradation pathways, and impacts on dissolved organic matter (DOM) transformation were systematically investigated. Under the optimized conditions, a humic acid (HA) removal efficiency of 66.28% was achieved, which was attributed to the cooperative redox behavior of Fe and Cu species. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed the simultaneous generation of OH, and 1 O 2 . A quantitative chemical probe-based kinetic analysis clarified the contributions of individual reactive species, and pollutant degradation proceeded through the combined action of OH/-driven radical oxidation and 1 O 2 -mediated selective oxidation. Advanced characterization using three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) showed that the system altered the molecular composition of DOM in both conventionally treated and advanced-treated effluents, converting high-molecular-weight, reduced components into low-molecular-weight, more oxidized intermediates. This work provides an effective catalytic strategy for the deep treatment of organic-contaminated water using carbon-based bimetallic activators.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yifan Zhu,Renjie Wang,Mengyao Ma,Hanyu Ji,Jinnan Gan,Xudong Song,Huijuan Ran,Qianqian Chen,Qiaohan Cheng,Hongyu Zhu,Qingsong Zhu
Uric acid (UA) concentrations serve as pivotal health indicators. This study developed a novel carbon paper (CP) and Fe-MOF composite and utilized it as an efficient electrochemical sensor for the detection of UA. SEM, XRD and FT-IR confirms the successful in-situ growth of Fe-MOF on the carbon paper substrate. The sensor exhibits a linear response to UA concentrations ranging from 3 to 400 μM, with a high correlation coefficient (R 2 = 0.998) and a LOD of 2.798 μM. The sensor demonstrates excellent reproducibility, with an RSD of less than 5%, and notable long-term stability, retaining 96.4% of its initial current response after one month. Furthermore, it exhibits selectivity in UA detection even in the presence of interfering species such as ascorbic acid and dopamine. The feasibility of using the CP/Fe-MOF sensor to detect UA in a typical biological fluid, bovine serum, was also evaluated by the standard addition method. The enhanced sensing performance can be attributed to the preservation of the carbon paper's superior electron transport properties within the composite material, combined with the increased specific active sites by the Fe-MOF components, which significantly boost the electrochemical sensing capabilities.
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Energy & Environmental Materials
·
2026
·
IF 13.8
Eunchae Oh,Jaewon Jang,Yoon Kyeung Lee,Junghoon Yang,Byung-Joo Kim,Jungpil Kim
The direct conversion of CO 2 into high-quality carbon nanotubes (CNTs) remains a formidable challenge, primarily due to the oxidation of metal catalyst by the oxidative nature of CO 2 . To overcome this limitation, a tandem catalytic system was implemented, in which CO 2 was converted to produce CH 4 on Ni catalysts in the primary reactor, and the CNT was synthesized from CH 4 on an Fe catalyst in the secondary reactor. Nevertheless, unreacted CO 2 was introduced into the secondary reactor, where the Fe catalysts were oxidized and thus failed to produce any solid carbon. To prevent the oxidation of Fe catalysts, a bimetallic Fe–Mo catalyst was employed instead of pure Fe. Mo was partially converted to Mo 2 C by reacting with unreacted CO 2 , which effectively suppressed the oxidation of Fe, thereby stabilizing the active Fe phase. This transformation was further corroborated by XPS analysis, where the Mo 3d spectra exhibited an increased Mo 2+ peak intensity, whereas the Fe 2p spectra showed a stronger metallic Fe signal, confirming that Mo incorporation inhibited Fe oxidation. However, excessive Mo loading resulted in the formation of multi-walled CNTs instead of single-walled CNTs, as evidenced by the reduced selectivity toward radial breathing modes in the Raman spectra and the broader diameter distribution observed in TEM measurements. These findings underscore the critical role of Mo in preserving Fe activity under oxidizing conditions and highlight the importance of optimizing its content, as an appropriate Mo level enables the selective synthesis of high-quality single-walled CNTs from CO 2 via a dual-step tandem process.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Hui Cheng,Tong Yu,Yanhong Wang,Yang Zhao,Qinfu Zhao,Huifen Feng
The limited penetration and efficacy of chemotherapeutic agents, constrained by the distinctive pathophysiological conditions of the tumor microenvironment (TME), remain a major therapeutic obstacle. In recent years, there has been growing interest in modulating the TME to overcome these barriers, which provides a promising way for enhancing cancer treatment. To address this challenge, a multifunctional nanoparticle system (DOX/FeNHC-PEG) was developed for oxidative stress-augmented triple-modal therapy. The system was constructed by doping Fe 3+ ions and N atoms into hollow carbon nanostructures, followed by surface functionalization with NH₂-PEG and subsequent loading of doxorubicin (DOX) into its mesoporous cavities. FeNHC-PEG nanozyme exhibited remarkable multi-enzyme mimetic activities, consuming endogenous glutathione while generating substantial OH through the peroxidase (POD)-like and oxidase (OXD)-like activities, thereby intensifying tumor oxidative stress. Furthermore, the nanozyme demonstrated excellent photothermal conversion efficiency under NIR irradiation. Crucially, real-time shear wave elastography (SWE) revealed that the combined effects of photothermal therapy (PTT) and reactive oxygen species (ROS) significantly reduced tumor viscoelasticity by degrading extracellular matrix components. The change not only enhanced intertumoral drug penetration but also cooperated with persistent oxidative stress to remodel the tumor microenvironment, ultimately leading to a significant increase in chemosensitivity to DOX. Meanwhile, the localized hyperthermia further potentiated the enzyme-like activities, enabling amplified ROS generation. In vivo studies indicated that DOX/FeNHC-PEG exhibited outstanding biocompatibility and potent tumor growth suppression (95.8% ± 1.8% inhibition) with negligible systemic toxicity. The triple-synergistic therapy system represented an innovative approach for tumor microenvironment remodeling, showing considerable translational potential.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Shan Huang,Lingyun Huang,Qi Zuo,Jian Liu,Jiushuai Deng
This study addresses the selectivity challenge in the flotation separation of fine cassiterite from calcium-containing gangue minerals, particularly calcite, by developing a Fe 3 + -CMC depressant system. Micro-flotation tests demonstrated that this system significantly improved separation efficiency: compared to using CMC alone, the SnO 2 recovery increased by 54.23–85.79 % (at a grade of 85.63 %), while the calcite recovery was depressed to 11.66 % (a reduction of 3.36 percentage points). The mechanism was systematically elucidated through contact angle measurements, solution chemistry calculations, surface characterization (Zeta potential, FTIR, XPS, AFM), and theoretical simulations (MD, DFT). The results indicate that Fe³ ⁺ mainly exists as Fe(OH)₃ in the pulp, which adsorbs on the cassiterite surface via hydroxyl groups and on the calcite surface through oxygen sites in CO₃²⁻. CMC consumes Fe³ ⁺ adsorbed on the cassiterite surface, while Fe³ ⁺ on the calcite surface provides additional adsorption sites for CMC, thereby enhancing its selective coverage. The stable Fe(OH)₃-CMC configuration promotes multilayer adsorption, effectively increasing cassiterite recovery while depressing calcite. This strategy, leveraging the synergistic effect of metal ion pretreatment and an organic depressant, offers a feasible approach for the efficient beneficiation of complex tin ores.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xi Zhu,Zhikun Li,Bolong Liang,Shijie Xing,Hongbin He,Xiliang Li,Shu-Xuan Liang
The continuous contamination of ciprofloxacin (CIP) pharmaceutical residues poses a potential risk to the ecological environment and human health. Using semiconductor materials with optimized heterojunctions for photodegradation is an effective way for the CIP removal. In this study, Fe-ZnO/CdS Z-type heterojunction was synthesized, and used for the photodegradation of organic pollutants. The Fe-doping brought abundant surface oxygen vacancies to ZnO, which could effectively promote interfacial electron transfer. In addition, the valence transition of Fe (II)/Fe (III) could effectively participate in the redox cycle and improve the carrier transfer efficiency. The construction of Z-type heterojunction facilitated the separation of photogenerated carriers, and the photogenerated electrons in the conduction band of CdS reduced oxygen to produce superoxide radicals as the main active radicals. A series of photoelectric characterizations had proved that the introduction of CdS could effectively improve the visible light utilization rate and photogenerated carrier separation efficiency. The Fe-ZnO/CdS system achieved 90.0% degradation efficiency of CIP within 120 min under visible light. Impressively, Fe-ZnO/CdS heterojunction showed practical degradation capability in complex aqueous environments and excellent reusability. This study provided an effective strategy for the design of metal oxide-based photocatalysts and offered a new idea for the removal of drug residual contaminants.
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Materials Today Chemistry
·
2026
·
IF 7.4
Zhen Li,Mengting Zhu,Junchao Qian,Ruguang Ma,Zhengying Wu
One of the key challenges in the development and application of thermo-electrochemical cells (TECs) as energy-harvesting systems is the availability of economically feasible electrode materials. In this study, a Fe-doped molybdenum dioxide (MoO 2 ) with Pt-like electrochemical performance was feasibly synthesized via a solvothermal method combined with an annealing treatment. The obtained Fe-doped MoO 2 (Fe–MoO 2 ) displays a uniform spherical morphology with an average size of 24 nm. Moreover, Fe doping reduces the lattice spacing and modulates the electronic structure of MoO 2 . Thereby, the optimized Fe–MoO 2 exhibits a high active surface area (ESA = 1.69 cm 2 ) and very low contact potential difference (CPD = 0.097 V), showing a short-circuit current density ( J sc = 0.520 mA cm −2 ) and a maximum power density ( P max = 5.07 μW cm −2 ) better than pure MoO 2 (0.464 mA cm −2 , 4.72 μW cm −2 ) and comparable to commercial Pt (0.517 mA cm −2 , 4.97 μW cm −2 ) electrodes in TECs (ΔT = 25.2 K). Additionally, this Fe–MoO 2 -based TEC maintains stable voltage and current over 7 h, indicating excellent stability and reversibility in the cycling tests. This study demonstrates that Fe-doped MoO 2 can serve as a low-cost, high-performance electrode material for TECs, offering a new solution for low-grade heat recovery.
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MATERIALS & DESIGN
·
2015
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IF 3.501
X.A. Fan,Z.Y. Wu,G.Q. Li,J. Wang,Z.D. Xiang,Z.H. Gan
Intergranular insulated Fe–6.5 wt.%Si/SiO 2 composite compacts were prepared by in-situ chemical deposition combined with a subsequent spark plasma sintering process. Most of the conductive Fe–6.5 wt.%Si alloy particles were coated with SiO 2 insulating layer in Fe–6.5 wt.%Si/SiO 2 composite compacts. The presence of SiO 2 insulating layer increased the resistivity by two orders of magnitude for intergranular insulated Fe–6.5 wt.%Si/SiO 2 composite compacts (4.8 × 10 − 5 Ω·m) compared with that of Fe–6.5 wt.%Si compacts without SiO 2 insulating layer (9.7 × 10 − 7 Ω·m). In addition, most of the eddy currents could be confined in the SiO 2 -coated Fe–6.5 wt.%Si particles, which equated to reducing the effective radius of eddy current in Fe–6.5 wt.%Si alloy. So, the intergranular insulated Fe–6.5 wt.%Si/SiO 2 composite compacts presented a lower core loss compared with that of Fe–6.5 wt.%Si compacts without SiO 2 insulating layer or traditional Fe–6.5 wt.%Si electrical steels at medium and high frequencies. Good soft magnetic properties were also obtained for the intergranular insulated Fe–6.5 wt.%Si/SiO 2 composite compacts, with a saturation magnetization of 164.6 emu/g, a coercive force of 12 Oe, and a relative permeability of 3.2 × 10 3 at 50 Hz. The intergranular insulated Fe–6.5 wt.%Si/SiO 2 composite compacts provide valuable inspiration for developing new high silicon electrical steel cores with low core loss and excellent magnetic and electric properties.
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International Journal of Electrochemical Science
·
2023
·Vol. 14
·期 6
·5820-5830
·
IF 1.5
Yao Liug,Xiaojing Liug,Junli Liu,Chaozhong Guo,Yanrong Li,Jin Zhang,Zhongbin Li
Ternary Fe-N-C catalysts are regarded as the most promising candidates for low-cost alternatives to the Pt-based materials for catalyzing the oxygen reduction reaction (ORR). In this paper, the Fe and N codoped carbon catalyst (Fe-Py@K-800) with the unique foam-like 3D structure has been fabricated by using the molecular sieve as a new solid-state template. The results of physical characterization indicate that Fe atoms are coordinated with nitrogen atoms to form the Fe-N ORR-active structure. In contrast with the commercial Pt/C catalyst, the Fe-Py@K-800 displays a comparable ORR electrocatalytic activity with an onset potential of ~1.1 V and a half-wave potential of ~0.88 V ( vs. RHE), however, the long-term stability of Fe-Py@K-800 is obviously better. These results show that iron-organic coordination in the pyrrole ring will play a role in the generation of nitrogen-rich active sites, which facilitates the enhancement of ORR activity in alkaline electrolyte.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chenxi Wu,Huajun Lai,Feng Wang,Dianhui Wang,Weijiang Gan,Yulai She,Zhongmin Wang
V-based alloy membranes have huge potential for hydrogen separation and purification due to their higher hydrogen permeability , but suffer from hydrogen embrittlement . To address this matter, Pd and Fe have been chosen as alloying additions in V-based membranes to inhibit hydrogen embrittlement and maintain high hydrogen permeation performance based on the lattice-matching strategy. The phase structure, composition, microstructure and hydrogen permeation properties of V-Pd-Fe ternary alloy are investigated systematically, and the V-Fe and V-Pd binary alloys are presented for comparison. The results show that the prepared V-Pd-Fe ternary can match almost perfectly with pure V in lattice constants . Attributing to the lattice-matching strategy, the V-Pd-Fe ternary alloy exhibits more excellent hydrogen permeable properties than that of V-Fe and V-Pd binary alloys . The reduction of hydrogen embrittlement is ascribed to the lower hydrogen solubility that induced by the lattice distortion and electronegativity of Fe and Pd. Meanwhile, the manipulated lattice constant that parallel to pure V maintains high hydrogen permeation performance. Additionally, the designed ternary V 87.8 Pd 8 Fe 4.2 alloy exhibits exceptional long-term hydrogen permeation stability at 573 and 623 K, and hydrogen flux gradually decreases at 673 and 723 K is observed due to the interdiffusion between Pd film and V 87.8 Pd 8 Fe 4.2 substrate and defects in the Pd coating. This study offers new scenario and method for optimized hydrogen permeable properties and restrains hydrogen embrittlement in the alloy membrane.
研究领域:
材料科学
·
氢能与储能
·
金属膜分离技术
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固态氢传输
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合金设计
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物理冶金学
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaozhong Zhou,Zhaoyi Qi,Yuyuan Jiang,Pengfei Yan,Juanxia Ding,Haiyan Wang,Hongkai Lu,Dongxu Liu,Kaifa Dong,Yougen Tang,Dongfei Sun,Ziqiang Lei
SiO x is regarded as a promising anode material for the next-generation lithium-ion batteries with high energy density. However, the reduplicative volume changes during cycling cause the pulverizations of Si, leading to decreased utilization of active Si component and poor cycling performance. Herein, a facile and scalable Fe-Cr decorating strategy is reported to boost the lithium storage of SiO x anode. Our comprehensive characterizations indicate that there are strong interactions between Fe-Cr and SiO x during a facile ball milling process. After cycling, Fe-Cr nanoparticles are dispersed in the in-situ formed lithium silicates and Li 2 O matrix, which can maintain superior conductivity of lithium ion and electron for the active components through point-to-point connections. This unique structure boosts the electrochemical de-alloying process of the low-valent Li x Si (0 ≤ x ≤ 2), and increases effective utilization of the active Si component during cycling, resulting in improvement of reversible capacity and cycling stability. This bm SiO x -FeCr electrode can deliver high reversible specific capacity (1370 m Ah g −1 at 200 mA g −1 ), good rate capability (653.8 m Ah g −1 at 2000 mA g −1 ), and superior cycling stability. This work provides a promising route for improving the utilization of active Si component and the structural stability of SiO x -based anodes.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
·
电池技术
·
固态物理
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高影响因子
ADVANCED MATERIALS
·
2026
·
IF 26.8
Zhechen Fan,Shuhu Yin,Wenhao Miao,Yudie Zhou,Weiyi Zhao,Yixuan Yin,Hao Yu,Lin Lin,Lina Hou,Hao Wan,Ying Wang,Junjie Ge
Atomically dispersed Fe–N–C catalysts are regarded as promising alternatives to platinum-group-metal (PGM) catalysts for proton exchange membrane fuel cells (PEMFCs). However, their further development is hindered by inadequate utilization of active sites in membrane electrode assembly (MEA). Herein, we developed a high mass activity O–FeNC catalyst with high site density and enhanced site utilization. C═O groups function as hard base linkers, promoting the densification of FeN 4 sites through Lewis acid-base interactions. Moreover, they also direct interfacial alignment within triple-phase boundaries, leading to concentrated hydronium ions and accelerated oxygen permeation via regulated ionomer nanophase segregation. As a result, the obtained O–FeNC cathode delivered a current density of 66.45 mA cm −2 at 0.90 V iR-free , surpassing the US Department of Energy 2025 target (44 mA cm −2 at 0.9 V iR-free ), with a mass activity that is 59% higher than commercial Pt/C. The peak power densities reached 1.8 W cm −2 under H 2 –O 2 and 0.93 W cm −2 under H 2 –air, alongside demonstrated industrial scalability through gram-scale synthesis and a 500 W PGM-free cathode stack prototype.
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高影响因子
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