Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123034
·
IF 7.5
Lin Yue,Shiqi Xing,Xiaoyun Han,Wang Liang,Yanfang Liu,Xinyang Liang,Yonghui Han
In this paper, a Bimetallic MOF material Ce-Fe-MI was doped in cellulose acetate (CA) to form a composite catalyst Ce-Fe-MI/CA for catalytic ozonation degradation of tetracycline (TC) wastewater. When the mass ratio of Ce-Fe-MI to CA is 0.45:1, the removal rate of Chemical Oxygen Demand(COD) reaches 95.04% in 90 min. The Ce-Fe-MI/CA catalyst exhibits high stability, with only a 4.61% decrease in the removal of COD after four cycles of use. The active components such as •OH and 1 O 2 are produced during the Ce-Fe-MI/CA catalyzed ozonation process. Density functional theory (DFT) simulations demonstrate distinct roles of metallic sites: Ce sites dominate TC adsorption, whereas Fe sites activate catalytic ozonation. The electron transfer between Ce and Fe can effectively regulate the surface valence state and rapidly activate surface adsorbed reactants. Furthermore, the presence of oxygen vacancies in the Ce-Fe-MI/CA framework significantly enhances the catalytic performance. The air flotation-catalytic ozonation coupling process is applied to the treatment of actual pharmaceutical wastewater. The coupled system runs continuously for 480 min, and the effluent COD kept below 50 mg·L −1 .
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TALANTA
·
2022
·
IF 6.556
Xuemei Ma,Jiayi Yu,Lin Wei,Qian Zhao,Liyong Ren,Zhiyong Hu
Simultaneous selective determination of Fe (Ⅱ) and Fe (Ⅲ) is of great significance to the study of iron ion tracking and release of iron supplement in gastric fluid. In this paper, a composite material (N-CQDs/AgNPs/β-CD) was prepared by a one-pot method. The various characterizations confirmed the silver nanoparticles (AgNPs) grew in situ on the surface of nitrogen-doped carbon quantum dots (N-CQDs), and the β-cyclodextrin (β-CD) and AgNPs linked together by Ag–O bonds finally presented gourd-like nanoparticles on the surface of N-CQDs. Then, N-CQDs/AgNPs/β-CD modified glassy carbon electrode (GCE) was applied to detect Fe(II) and Fe(III) simultaneously. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results confirmed that N-CQDs/AgNPs/β-CD enhanced electrode performances because of the synergistic effect between N-CQDs, AgNPs and β-CD. The sensor was successfully applied for the determination by differential pulse voltammetry (DPV) of Fe(II) and Fe(III) released from four iron supplementations in simulated gastric fluid (SGF).
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Suyun Wang,Yuanbo Fang,Wuli Han,Qiang Li,Xiao Luo
For the first time, MIL-100(Fe)-derived microspheres with a hollow structure were perfectly constructed and used as a photocatalyst to decompose organic dyes under visible light irradiation. The prepared MIL-100(Fe)-NH2(20) could boost the separation, migration, and transfer of photoinduced carriers effectively, together with efficient photocatalytic performance. In simulated sunlight, the MIL-100(Fe)-NH2(20) exhibits the best degradation efficiency as well as excellent reusability and stability, and the degradation rate for rhodamine B (RhB) can be more than 99.5% within 80 minutes. Structural analysis proves that the porous MIL-100(Fe)-NH2(20) catalyst reaps an amazing hollow structure, large specific surface areas (2784.9 m2·g–1), and uniform distribution of Fe and N active phases. Besides, the enhanced visible light response and lower recombination rate of e––h+ pairs are both confirmed, and the band gap is significantly reduced to 2.53 eV. Finally, the photocatalytic mechanism and the possible degradation pathway were suggested. Owing to the enhanced photocatalytic activity, good tolerance to pH and water quality, and excellent stability, the MIL-100(Fe)-NH2(20) catalyst can be potentially used in a wide range of dye wastewater purifications.
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2026
·Vol. 123
·期 5
·e2522028123
·
IF 9.1
Yongpeng Liang,Haochen Han,Yuewei Zhao,Wenjun Yu,Huiying Chen,Jiachuan Liu,Haojie Jin,Yangfan Xu,Wei Chen,Kun Qian,Xiangdong Yao,Lin Huang,Xiao-Ming Chen
Thymic epithelial tumors (TETs), rare yet clinically significant malignancies, face diagnostic challenges due to their occult presentation and lack of noninvasive risk-stratification tools, leading to systemic overtreatment and poor prognoses for high-risk subtypes. To address this unmet need, we developed a Fe3O4@Fe metal–organic framework heterojunction-enhanced laser desorption ionization mass spectrometry (LDI MS) platform for the efficient analysis of serum metabolic fingerprints (SMFs). Engineered through gradient pyrolysis, this nanomaterial synergizes ultraviolet absorption and photothermal conversion from its two constituent components with enhanced charge separation, achieving 1,000-fold improvement in sensitivity and thus enabling direct SMF acquisition from 1 μL of serum. Coupled with machine learning, the platform demonstrates robust diagnostic performance, yielding area under the curve (AUC) of 0.960 for distinguishing TETs from benign control and AUC of 0.856 for hierarchical risk stratification, outperforming clinical workflows. Beyond advancing material design for LDI MS, this work establishes a clinically translatable framework for rapid, large-scale screening, addressing critical gaps in TET management through metabolic-driven stratification.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Chengwan Wang,Junchen He,Aoyu Shen,Tong Xie,Ruo Huang,Xian Wu,Yue Yuan,Sheng-Tao Yang
Nitrate (NO 3 - ), a prevalent pollutant in aquatic ecosystems, poses significant ecological and human health risks due to its excessive accumulation, which accelerates eutrophication. In this study, a novel bimetallic material (B-Fe/Cu) was synthesized via high-energy ball milling using micron-sized zero-valent iron (ZVI) and copper salts. When integrated with ultraviolet (UV) light, the UV/B-Fe/Cu system achieved complete conversion (100%) of 10 ppm NO 3 - -N within 120 minutes. Intriguingly, abundant Cu species were found to mediate the efficient redox cycling between Fe 3+ and Fe 2+ , and superoxide radicals (O 2 ·- ) facilitated the redox cycling between Fe 3+ /Fe 2+ and Cu 2+ /Cu + , while the localized micro-acidic microenvironment of B-Fe/Cu enabled the dynamic pH regulation during nitrate reduction. These triple functionalities ensured the full nitrate conversion in UV/B-Fe/Cu system without toxic NO 2 - byproduct formation across a wide pH range of 3.0-11.0. Furthermore, the UV/B-Fe/Cu system demonstrated exceptional operational stability and environmental robustness, retaining >90% reduction efficiency after four consecutive reuse cycles. These insights advance the rational design of iron-based materials for scalable and sustainable water purification technologies.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jinfeng Li,Yuxuan Li,Yang Liu,Yuan Shao,Wuyang Song,Youjun Lu
： High-entropy nitride ceramics (HENCs) require high sintering temperatures,and exhibit relatively low density and insufficient fracture toughness, greatly restricting their applicability in structural load-bearing scenarios under extreme service environments. To address these limitations, this study employed Fe as a sintering aid and prepared (Hf 0.2 Zr 0.2 Ti 0.2 Nb 0.2 Ta 0.2 )N-Fe composite ceramics with 0–20 wt% Fe via spark plasma sintering (SPS) in the temperature range of 1600–2100 ℃. We evaluated how Fe content and sintering temperature jointly affect microstructure and mechanical properties. The results show that pure HEN ceramics densifies only at 2100 °C, reaching 96.41% relative density, due to sluggish diffusion and lattice distortion. Although high temperature enhances diffusion, it also coarsens the grains to 5.40 ± 2.18 μm. In contrast, adding only 5 wt% Fe enables densification at a reduced temperature of 1700 °C, achieving 98.81% relative density and refining the grain size to 3.25 ± 1.01 μm. Regarding mechanical properties, pure HEN ceramics exhibits a hardness of 19.79 ± 0.49 GPa and a fracture toughness of 3.86 ± 0.32 MPa·m 1/2 . When 5 wt% Fe is added, both mechanical indices increase markedly, with hardness increasing to 21.09 ± 0.35 GPa and fracture toughness to 4.38 ± 0.31 MPa·m 1/2 . These results demonstrate a pronounced synergistic effect of Fe addition and reduced sintering temperature on the microstructure of HEN ceramics. During sintering, by forming Fe-rich interfacial phases, Fe accelerates low-temperature densification, while its segregation at grain boundaries and triple junctions regulates boundary migration, enabling fine grains and high density at reduced sintering temperatures.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Zhaoyang Li,Xiang Zhang,Yingjie Song,Weiming Yang,Xiaolu Cheng,Ping Zhang,Cheng Liu,Changchun Zhou,Haishun Liu
Fe-based metallic glass (Fe-based MG) ribbons are susceptible to surface oxidation during long-term service, resulting in degraded magnetic and catalytic properties. In this work, a rapid and cost-effective strategy, termed Selective Etching and Ion Exchange (SEIE), was applied to restore the catalytic activity of oxidized Fe-based MG ribbons. Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 ribbons were thermally oxidized at 200 °C for 30–240 min to simulate varying degrees of aging after service, followed by surface cleaning and SEIE activation. The activated Fe-based MG ribbons exhibited a first-order rate constant ( k obs ) of 2.37 min −1 for degrading 20 mg/L acid orange 7 (AO7), which is an order of magnitude higher than that of the pristine ribbons. Microstructural characterization revealed the formation of Cu clusters with two distinct morphologies generated by ion exchange, which induced a galvanic coupling effect, significantly enhancing hydroxyl radical (·OH) generation and catalytic degradation. However, excessive Cu deposition impeded Fe-H 2 O 2 interactions, reducing catalytic activity. The activated Fe-based MG ribbons maintained 70 % higher k obs values than the pristine ribbon after 10 degradation cycles, and exhibited excellent performance for phenol degradation ( k obs =0.417 min −1 ). This study demonstrates a sustainable and efficient surface-activation approach for utilizing oxidized Fe-based MGs, offering both environmental and economic benefits.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Hu T. T.,Xie Y. X.,Zhao K.,Yang X. S.
Trace oxygen-doped FeSe 0.4 Te 0.6 single crystals were synthesized using the self-flux method to investigate the effects of oxygen incorporation on their crystal structure, superconducting transition, and flux pinning properties. Experimental results indicate that trace O-doping effectively modulates the superconducting transition temperature ( T c ) and enhances the critical current density ( J c ), with a more pronounced improvement in current-carrying capacity observed under high magnetic fields. Based on the Dew–Hughes model analysis, the sample with 0.5% O-doping exhibits the most robust pinning effect. This study demonstrates that trace oxygen doping can effectively optimize the superconducting performance of FeSe 0.4 Te 0.6 and reveals the existence of an optimal doping regime, which provides valuable insights into the mechanism and practical application of iron-based superconductors.
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TURKISH JOURNAL OF CHEMISTRY
·
2022
·Vol. 43
·期 1
·50-62
·
IF 1.151
QIN DAWEI,CHANG SHUHUA,QIAO MIN,YUAN XIAOTONG,LIU WEI,LIU GANG
Fe(II)-montmorillonites (Fe(II)-MMTs) were prepared by mixing solutions of Fe(II) and montmorillonite at pH 3.5. Two different Fe(II)-MMTs were prepared and the ferrous iron contents were 40 mg/L and 80 mg/L. All samples were characterized by XRD, FT-IR, TGA, DSC, and nitrogen adsorption. By nitrogen adsorption, the pore size can be obtained in the pore diameter curve with average pore widths of 6.67 nm, 9.96 nm, and 17.07 nm, respectively. The removal rate of phosphate increased rapidly during the first 40 min, in which Fe(II)-MMT (1) and Fe(II)-MMT (2) were stronger adsorption systems than MMT. The maximum adsorption was 48.38 mg/g at pH 2.0. The kinetics of phosphate adsorption were better described using pseudo-second-order models (R$^{2}$: 0.997, 0.999, 1.000) than pseudo-first-order (R$^{2}$: 0.933, 0.900, 0.760). R$^{2}$ is the determinable statistic coefficient that measures the goodness of fit. If the R$^{2}$ value is closer to one, the fitting degree of the regression line is better. By the thermodynamic analyses, we obtained the $\Delta $G$^{\circ}$ and $\Delta $H$^{\circ}$ of samples at 298 $^{\circ}$C, 303 $^{\circ}$C, and 310 $^{\circ}$C. The adsorption isotherms also better fitted a Langmuir model in which the process was nonspontaneous and exothermic.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 14.3
Tao Li,Wan Wang,Jiawei Chen,Yue Wang,Xiangbin Cai,Lini Yang,Xin Liu,Jiangyong Diao,Zarrin Es'haghi,Lixin Xia,Li Jin,Guoqing Wang,Hongyang Liu
The development of highly efficient nanozymes faces challenges of insufficient catalytic activity and low atom utilization. Atomically dispersed metal nanozymes have received widespread attention due to their high atomic utilization efficiency and exceptional catalytic activity. Bimetallic catalysts demonstrated enhanced catalytic performance owing to synergistic geometric and electronic effects arising from heterometallic interactions. Herein, we report an atomically dispersed palladium-iron bimetallic cluster nanozyme, in which fully exposed Pd clusters bonded to adjacent Fe atomic clusters are anchored onto defect-rich nanodiamond-graphene supports (PdFe/ND@G). The Pd-Fe interfacial sites fabricated in atomically dispersed bimetallic clusters deliver abundant oxygen activation sites for high-efficiency catalytic reactions and exhibit enhanced oxidase-like catalytic activity, demonstrating superior enzymatic activity and antibacterial performance compared to monometallic Pd and Fe clusters, while surpassing those of previously reported nanozymes. DFT calculations reveal that, compared to monometallic Pd clusters, atomically dispersed Pd-Fe clusters synergistically catalyze O 2 cleavage into OO* intermediates via Pd-Fe interfacial sites while exhibiting lower energy barriers, which is the critical factor for their enhanced enzyme-like activity. This study provides novel insights into constructing highly efficient atomically dispersed bimetallic cluster nanozymes.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Huan Song,Le Song,Fangzhou Wu,Yonglei Xing,Xiaoyong Jin,Gang Ni,Xin Wang
Utilizing bimetallic synergy presents a promising approach for creating exceptionally effective catalysts for peroxymonosulfate (PMS) activation. In this study, a Co Fe bimetallic catalyst (Co8Fe1-P1-NC) was constructed by regulating the Co/Fe doping ratio and further introducing phosphorus doping. During PMS activation for phenol (Ph) degradation, Co8Fe1-P1-NC exhibited outstanding catalytic performance. Under the optimized conditions, the Co8Fe1-P1-NC/PMS system achieved complete removal of Ph within 2.5 min, with an apparent rate constant as high as 2.058 min −1 and a total organic carbon (TOC) removal efficiency of up to 80%. Combined results from quenching experiments, electron paramagnetic resonance (EPR), in situ Raman spectroscopy, electrochemical measurements, and premixing tests demonstrated that O 2 •− , 1 O 2 , high-valent metal species, and electron-transfer pathways collectively contributed to Ph degradation. Theoretical calculations indicate that Fe and P doping make the PMS adsorption energy more negative and elongate the O O bond (l O–O ), thereby facilitating PMS activation on the catalyst. Co8Fe1-P1-NC also showed excellent broad-spectrum degradation capability toward various phenolic pollutants, achieving complete removal within 3 min. These findings indicate that the combined regulation of metal active sites and electronic structure through bimetallic synergy and nonmetal doping can significantly enhance PMS activation efficiency, providing a new avenue for the design of high-performance catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jun Liao,Yongqi Zhang,Jiahao Luo,Congcong Ding,Mei Tang,Lielin Wang,Yinhang Zhou
Fe@PBC was synthesized via facile pyrolysis and in-situ reduction using pig manure as low-cost biomass precursor. • Fe@PBC exhibits ultrahigh U(VI) adsorption capacity of 623.7 mg/g and fast equilibrium within 60 min. • Excellent anti-interference ability is achieved with removal efficiency >93% under coexisting cation interference. • U(VI) immobilization is dominated by Fe-mediated reduction coupled with O/N functional group complexation. • Surface chemical properties outweigh physical structure in governing U(VI) adsorption performance. The oxidized pig manure biochar doped with reduced iron species (Fe@PBC) was fabricated through facile pyrolysis and in-situ reduction to overcome the drawbacks of conventional carbon-based adsorbents for U(VI) adsorption, including agglomeration, insufficient active sites, weak reducibility and poor anti-interference capacity. An ultra-high adsorption capacity of 623.7 mg/g, fast adsorption equilibrium within 60 min and excellent selectivity toward U(VI) even under interference of coexisting cations were achieved by Fe@PBC. The high removal efficiencies were maintained in tap water and surface water and the stable adsorption performance was retained for at least 6 cycles. Notably, although the coconut shell-derived biochars exhibited significantly higher specific surface areas and more developed mesopores, they showed markedly inferior U(VI) uptake relative to the pig manure-derived counterparts, confirming that surface chemical functionalities, rather than physical pore structures, governed the adsorption process. Besides, the U(VI) immobilization mechanism was attributed to surface complexation by oxygen- and nitrogen-containing functional groups, with the possible participation of iron oxides and iron (oxy)hydroxides in the adsorption process. The column experiments further demonstrated that the breakthrough curves were well described by the Thomas and Yoon-Nelson models, with the breakthrough time being prolonged at lower flow rates, higher adsorbent dosages, and lower influent U(VI) concentrations, confirming the practical applicability of Fe@PBC for continuous wastewater treatment. The low-cost and eco-friendly adsorbent derived from agricultural waste was demonstrated to hold promising potential for efficient remediation of U(VI)-contaminated wastewater. Download: Download high-res image (186KB) Download: Download full-size image
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