SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Junxi Yan,Zhenyang Xu,Zhangtao Liu,Ning Xiao,Tingting Zhang
The microporous nature of MOF adsorbents has limited phosphate adsorption capacity due to their poor mass transfer and shielded active sites. Here, we report a Fe-doped Zr-MOF (Fe-HPUiO-66) with hierarchical porosity and abundant defects, synthesized via a combined strategy of Fe doping and selective pyrolysis of thermally labile ligands. The obtained adsorbents retain the UiO-66 topology while exhibiting a micro-to-mesoporous transition, which dramatically enhances phosphate diffusion kinetics and site accessibility. Fe-HPUiO-66 achieves a high adsorption capacity of 134 mg P/g, outperforming many reported adsorbents, along with excellent stability and reusability. Mechanism studies reveal that phosphate uptake is governed primarily by bidentate binuclear inner-sphere complexation with unsaturated Zr sites, supplemented by electrostatic attraction with protonated hydroxyl groups. Furthermore, oxygen vacancies serve as key active centers that enhance the adsorption affinity by inducing electron localization. This work demonstrates that synergistic engineering of metal nodes and pore architecture is an effective pathway to boost the overall performance of MOF adsorbents for water remediation.
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高影响因子
Materials Today Physics
·
2026
·
IF 9.3
Xin Meng,Songrui Wang,Shuaihao Tang,Bingwu Zhou,Yuehua Zhang,Zequan Wang,Hongyi Kang,Jiyuan Zhang,Shuangyu Jiang,Fanpeng Kong,Bing Li,Jue Gong,Xingang Zhao,Jiajun Wang,Haiping Xu
Fe-Fe 3 N@NCNTs exhibits half-wave potential at 0.92 V. • Fe-Fe 3 N@NCNTs shows a shift of only 15 mV after 30k cycles. • DFT and in-stiu Raman confirm Fe-Fe 3 N tunes adsorption energy to enhance ORR activity. • Fe-Fe 3 N@NCNTs-assembled ZABs have excellent potential for applications. : Interface engineering is regarded as a pivotal technique for overcoming the activity-stability trade-off in Fe-based oxygen reduction reaction (ORR) catalysts. Herein, a bifunctional catalyst of Fe-Fe 3 N@NCNTs heterostructure is synthesized through a simple one-step calcination method. The catalyst exhibits a remarkable half-wave potential of 0.92 V vs RHE for ORR with only 15 mV decay over 30k cycles and overpotential of 310 mV for OER. In-situ Raman and density functional theory (DFT) reveal that the electronic modulation of Fe-Fe 3 N hetero-interface activates Fe-N and C-N dual sites synergistically and achieves optimal intermediate adsorption strength, significantly lowering energy barrier of rate determine step. The assembled zinc–air batteries (ZABs) with Fe-Fe 3 N@NCNTs exhibit a high power density of 252.5 mW cm -2 and remarkable durability of 2400 h, while the corresponding flexible solid-state ZABs deliver excellent rate capability and robust stability over 1000 cycles. This work provides new insights into the design of advanced heterostructure electrocatalysts for practical energy storage applications. The prepared Fe-Fe 3 N@NCNTs composite catalyst leverages the synergistic effect between Fe and Fe 3 N, which optimizes both the structure and electron density. The unique structure significantly enhances the ORR/OER activity, enabling zinc–air batteries to achieve high power density, high specific capacity, and exceptional cycle life, demonstrating substantial promise for energy conversion and storage applications. Download: Download high-res image (453KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Zi-Ang Lu,Shan Jin,Tingting Qu,Ranran Liang,Yunchen Du,Mengxin Chen,Ping Xu
Conductive oxides with chemically distinct local environments are attractive for bifunctional water splitting because hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) impose different requirements on adsorption and charge transfer. Here, a descriptor-informed Fe/V co-doping strategy is proposed to regulate MoO 2 for photo-assisted electrocatalysis. Density functional theory (DFT) screening based on incorporation thermodynamics, local M–O bond mismatch, and near-Fermi-level electronic states identifies V as the most favorable dopant for lattice incorporation and Fe as the dopant that minimizes local bond-length mismatch while strongly perturbing the electronic structure. Guided by this complementarity, Mo 0.9 Fe 0.05 V 0.05 O 2 was synthesized and compared with pristine MoO 2 and single-doped controls. The co-doped catalyst preserves the MoO 2 framework and delivers the best overall performance, requiring 166 and 243 mV for HER and 253 and 281 mV for OER to reach 10 and 50 mA cm −2 under illumination. Electrochemical measurements reveal improved charge-transfer behavior and enhanced light-induced current response. Optical characterization and Finite-difference time-domain (FDTD) simulations indicate that the hollow architecture promotes optical-field localization, while DFT reaction energetics suggest site-dependent catalytic preferences, with V-associated environments favoring hydrogen adsorption and Fe-associated environments facilitating OER intermediate conversion. This study demonstrates that pairing dopants according to lattice compatibility and electronic perturbation is an effective route to activate MoO 2 for photo-assisted bifunctional water splitting. A descriptor-guided Fe/V co-doping strategy activates hollow MoO 2 for photo-assisted water splitting. Fe/V co-doping enables complementary HER/OER active sites, while the hollow architecture promotes optical-field localization and enhances interfacial charge-transfer kinetics under illumination. Download: Download high-res image (143KB) Download: Download full-size image
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高影响因子
ACS Applied Polymer Materials
·
2026
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IF 5.2
Guimin Huang,Ziyi Zhao,Hongjie Zhang,Benyan Zheng,Yanxiang Sang,Rui Geng,Bibo Wang,Yuan Hu,Lijun Li,Zhonghan Liu
Infected burn wounds remain challenging to treat because bacterial contamination and oxidative stress can jointly compromise tissue repair. Herein, we report an adhesive supramolecular elastomer patch (PLCTF) constructed from a dynamic poly(α-lipoic acid) network reinforced by Fe-polyphenol coordination and hydrogen bonding. The reversible disulfide chemistry of lipoic acid contributes to network adaptability, resulting in improved mechanical performance and conformal adhesion on moist skin-like biological tissue surfaces. Under 808 nm near-infrared (NIR) irradiation, PLCTF converted the incident NIR light into localized heat, thereby further enhancing PLCTF-mediated antibacterial activity against Staphylococcus aureus and Escherichia coli under controlled irradiation conditions. In addition, the polyphenolic motifs and lipoic acid-related components provided radical-scavenging activity, as evidenced by chemical radical-scavenging assays and intracellular ROS fluorescence analysis. PLCTF also showed favorable hemocompatibility and cytocompatibility, including after short-term NIR exposure, and promoted fibroblast migration. In an S. aureus-infected burn wound model, PLCTF combined with NIR irradiation accelerated wound closure and improved histological healing outcomes, including enhanced collagen deposition and re-epithelialization. Immunofluorescence analysis revealed increased angiogenesis-associated signals and reduced inflammation-associated marker staining. These results indicate that PLCTF integrates wet-tissue adhesion, ROS-scavenging activity, and NIR-assisted antibacterial function, supporting its promise as an antibiotic-free topical dressing for superficial infected burn wounds.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Yawen Cai,Xishi Tai,Baowei Hu,Xiangke Wang
The efficient extraction of uranium (U) from aqueous solutions is of great significance for ensuring global energy security and advancing environmental remediation. In this work, a novel Fe 3+ -doped Aurivillius-type ferroelectric material (Fe-BBT-0.15) was developed for enhanced piezo-catalytic U(VI) extraction. The incorporation of Fe 3+ was systematically optimized to improve its intrinsic piezoelectric responsiveness and piezo-catalytic activity. The Fe-BBT-0.15 demonstrated outstanding catalytic performance. Over 85% of 50 mg/L U(VI) was removed after 180 min of the ultrasonication stimulation across a broad pH range of 3.5–8.5. The piezo-catalytic system exhibited strong tolerance to temperature fluctuations, complex background electrolytes, and various competing ions. The reaction pathway was elucidated by integrating the identification of key reactive radicals with in-situ monitoring of H 2 O 2 accumulation. The H 2 O 2 production, co-driven by O 2 reduction and H 2 O oxidation/sonolysis, was attributed to the synergistic interplay of piezoelectric effect and cavitation effect. Combined with the XPS analysis, it was confirmed that the Fe-BBT-0.15 served as a stable “reaction center” and “charge pump”, which were capable of supporting the migration and utilization of charge carriers and reactive free radicals. Furthermore, XRD analysis revealed that U(VI) was immobilized in the form of metastudtite ((UO 2 )O 2 ·2H 2 O), a finding that directly linked the catalytically generated H 2 O 2 to effective uranium solidification. This study provides a high-performance adaptive piezo-catalyst and elucidates the underlying catalytic mechanism, thus, contributing to the advancement of sustainable uranium extraction.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2026
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IF 3.4
Jiang Pengfei,Hao Yifan,Jia Mingxi,Liu Cun
Hydrogen peroxide (H 2 O 2 ) is a key reactive oxygen species involved in physiological regulation and pathological processes, and its accurate quantification is essential for bioanalysis and disease-related studies. Herein, we report the synthesis of a series of Cu-Fe oxide nanozymes via a simple antisolvent crystallization strategy and systematically investigate their peroxidase-like catalytic activity toward colorimetric H 2 O 2 detection. By tuning the Cu/Fe molar ratio, the catalytic activity of the nanozymes can be effectively regulated, with Cu 2 FeO x exhibiting the highest peroxidase-like activity toward 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation in the presence of H 2 O 2 under acidic conditions and enabling sensitive colorimetric detection of H 2 O 2 over a linear range of 10–200 µM with a detection limit of 0.572 µM. Furthermore, the proposed sensing platform demonstrates satisfactory selectivity and reproducibility, and is successfully applied to the determination of H 2 O 2 released into cell culture supernatants after chemical stimulation. This work highlights the potential of composition‑regulated Cu-Fe oxide nanozymes as robust artificial enzymes for colorimetric H 2 O 2 sensing and provides insights into their application in bioanalytical systems.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Hongwei Ren,Junming Zhang,Aiqing Hao,Caixia Ding,Tianjun Hu,Ergui Luo,He Xiao,Man Zhao,Jianfeng Jia,Haishun Wu
Electrochemical seawater splitting is typically hindered by the corrosive effect of chloride ions (Cl⁻) on catalytic active sites during the oxygen evolution reaction (OER). Herein, a self-protecting Fe@NiAl electrocatalyst mediated by aluminate ions (Al(OH) 4 ⁻) was synthesized via a novel in-situ etching-oxidation strategy, which acts as an efficient and durable OER catalyst in alkaline seawater electrolyte. Comprehensive characterization techniques reveal that the incorporation of FeOOH and generation of oxygen vacancies (O vac ) modulate the chemical composition and electronic structure of Fe@NiAl, thereby promoting a γ-NiOOH/γ-FeOOH synergistic effect to enhance the OER activity. Of particular importance, the in-situ-generated Al(OH) 4 ⁻ within the Fe@NiAl catalyst exert a strong repulsive effect toward Cl⁻ in seawater, thereby significantly enhancing the catalyst’s corrosion resistance. Density functional theory (DFT) calculations demonstrate that FeOOH incorporation lowers the energy barrier for the formation of OER active intermediates, while Al(OH) 4 ⁻ generation reduces the Cl⁻ adsorption energy. A flow-type anion exchange membrane (AEM) electrolyzer utilizing Fe@NiAl as the bifunctional electrode achieves a cell voltage of merely 2.31 V at 1.0 A cm⁻ 2 and sustains stable operation for 800 h in alkaline seawater. This work provides valuable insights and a feasible strategy for designing robust and corrosion-resistant electrocatalysts for industrial-scale seawater electrolysis applications.
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CHINESE JOURNAL OF CATALYSIS
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2026
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IF 17.2
Xin Liu,Yezhou Yang,Jingru Yang,Maodi Wang,Qihua Yang
The selective hydrogenation of furfural (FAL) to furfuryl alcohol (FOL) over Ni catalysts offers a sustainable route for biomass valorization. However, the conventional Ni catalysts suffer from poor selectivity in FAL hydrogenation. Herein, we report that the moderate Fe doping in Ni/TiO 2 significantly enhances selectivity without compromising catalytic activity for the selective hydrogenation of FAL to FOL. Notably, Ni/Fe-TiO 2 catalyst with Fe content ≥ 4.9 wt% maintained > 90% selectivity toward FOL at nearly 100% conversion, whereas Ni/TiO 2 achieved only 38% under the identical condition. Combined experimental and theoretical studies revealed that the enhanced catalytic performance of Ni/Fe-TiO 2 originates from the dilution of contiguous Ni sites by Fe, which suppresses the further hydrogenation of FOL. Moreover, Fe sites exhibited a stronger affinity for carbonyl groups compared to Ni(0), indicating complementary role where Ni(0) primarily facilitates H 2 dissociation, while Fe sites play a critical role in carbonyl activation. These findings underscore the superior synergistic effect of bimetallic systems in promoting selective functional group transformation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ji-Ying Song,Lei Pan,Fu-Hao Zhang,Xin-Yun Song,Qi Wu
The residues of tetracycline antibiotics (TCs) in aquatic environments have led to pressing environmental issues, necessitating the development of efficient removal technologies. In this study, we constructed an adsorption-degradation synergistic system based on Fe₃O₄ nanoparticles/graphene oxide/layered double hydroxides (Fe₃O₄/GO/LDHs) for the removal of TCs from water. This Fe₃O₄/GO/LDHs composite ingeniously combines the adsorption advantages of both GO and LDHs: GO serves as a growth substrate for LDHs, effectively preventing the LDHs from agglomerating into bulk masses, while LDHs also inhibit the interlayer stacking of GO. This leads to enhanced specific surface area of up to 581.7 m 2 /g, establishing a robust structural foundation for efficient adsorption. The incorporation of Fe₃O₄ nanoparticles not only endows the material with excellent magnetism for convenient magnetic separation and recovery but also utilizes its peroxidase-like activity to achieve catalytic degradation. The equilibrium adsorption capacities of Fe₃O₄/GO/LDHs for tetracycline, oxytetracycline, and chlortetracycline reached 676.5 mg/g, 814.1 mg/g, and 808.1 mg/g, respectively, primarily driven by electrostatic, π-π and complexation interactions. In the presence of H₂O₂, Fe₃O₄/GO/LDHs activating H₂O₂ to generate reactive oxygen species, achieving over 90% degradation rate within 1 h, demonstrating strong catalytic capability. Integrating adsorption with in-situ degradation, Fe₃O₄/GO/LDHs functions as a network of micro-reactor factories, rapidly concentrating pollutants at catalytic active sites and creating a high-local-concentration microenvironment that dramatically accelerates catalytic reactions, thereby enhancing overall degradation efficiency. This study advances the development of adsorption-degradation bifunctional nanozymes for water purification.
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ACS Catalysis
·
2026
·Vol. 16
·期 15
·15348-15362
·
IF 13.6
Rhimi Baker,Harrath Karim,Liu Yifan,Liu Zheyang,Zhou Min,El-Khodary Sherif A.,Shi Weidong,Jiang Zhifeng
Photocatalytic CO 2 reduction to C 2 H 4 remains challenging due to inefficient multielectron transfer and sluggish C−C coupling kinetics. Herein, we demonstrate that precise engineering of metal−organic framework (MOF) nodes establishes dual-functional active sites that synergistically drive C−C coupling and H 2 O activation. A hybrid photocatalyst is constructed by integrating a porphyrinic MOF (Fe-MOFBPy), featuring axially coordinated bipyridine ligands that modulate paddlewheel Fe−N nodes, with carbon nitride (CN) to form a heterojunction. Controlled linker depletion introduces defects that generate coordinatively unsaturated Fe sites and enable rational tuning of Fe−N bonding. Combined density functional theory and ab initio molecular dynamics simulations reveal that the Fe−N bond acts as a dual-functional site, where the N atom facilitates H 2 O activation and proton transfer, while the Fe center promotes *CO + *CHO coupling toward C 2 intermediates. In contrast, defective MOFs with reduced Fe−N coordination form Fe−O sites that exhibit inferior activity due to inefficient H 2 O activation. Notably, the intrinsic flexibility of the Fe−N bond lowers the kinetic barrier for H 2 O dissociation. Consequently, the catalyst achieves a C 2 H 4 production rate of 24.5 μmol g −1 h −1 with an 87.1% electron-based selectivity, outperforming analogous systems. This work provides a blueprint for designing dual-functional sites in MOFs for solar-driven C 2 H 4 synthesis.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Wang Pengcheng,Wang Wei,Chen Wen,Yu Jie
The large-scale consumption and low recycling rate of plastics necessitate effective chemical recycling solutions. High-density polyethylene (HDPE) serves as an ideal carbon source for synthesizing high-value carbon materials such as carbon nanotubes. In this study, a powdered Fe/MgO catalyst was prepared to convert the HDPE into high-quality SWCNTs in a two-stage reactor. Concurrently, reactive force field molecular dynamics simulations elucidated the adsorption, cracking, and carbon diffusion behaviors of pyrolytic intermediates on the Fe surface, along with the kinetics of iron carbide formation. The results demonstrate that Fe/MgO efficiently converts HDPE into SWCNTs, achieving a maximum yield of 33.7% with 1 g of the catalyst containing 2 wt % Fe at 900 ° C. The catalyst preferentially adsorbs olefins such as ethylene, suppresses the polymerization and cyclization of small molecules, and thereby promotes SWCNT growth. The high efficiency of the Fe/MgO catalyst is attributed to a unique high-temperature inversion of its spinel structure, which triggers Fe 3+ migration from the bulk to the surface. This work not only presents a high-value route for plastic waste utilization but also provides atomic insights into SWCNT synthesis from HDPE using Fe/MgO.
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Catalysts
·
2026
·Vol. 16
·期 8
·673
·
IF 4.5
Shuai Wang,Peiyao Chen,Huanhuan Li,Yingning Wang,Xiongwei Liang,Changhao Yao,Yang Yang
Antibiotics have been extensively used in medicine and aquaculture, leading to severe environmental contamination. Among them, chlortetracycline (CTC) has attracted considerable attention due to its large consumption and high residual risk. MIL-125(Ti), as a representative titanium-based metal–organic framework, exhibits good structural stability and tunability; however, its intrinsically weak visible-light response and rapid charge recombination limit further photocatalytic applications. To improve its photocatalytic performance, MIL-125 was first synthesized via a hydrothermal method, and then Fe and S species were introduced through a combination of in situ coprecipitation and mild sulfuration, yielding an Fe/S-modified MIL-125 photocatalyst. The introduction of Na2S induced defect sites and coordinatively unsaturated centers on the MIL-125 surface, while the cooperative participation of Fe species further regulated the surface electronic structure and active-site distribution, thereby enhancing visible-light absorption and interfacial charge transfer. Under AM 1.5 irradiation, the optimized Fe/S-MIL-125 achieved a CTC degradation efficiency of 98.6% within 120 min at an initial concentration of 40 mg L−1. In addition, the material exhibited broad applicability toward multiple antibiotics, with degradation efficiencies exceeding 87% for ciprofloxacin (CIP) and clindamycin (CLI). Cycling tests demonstrated that the catalyst retained high activity after five successive runs, indicating excellent stability. Radical scavenging experiments and ESR analyses revealed that superoxide radicals (·O2−) were the dominant reactive species. Overall, the Fe/S-modified strategy significantly enhanced the photocatalytic performance of MIL-125 through defect engineering and interfacial charge regulation, offering a promising approach for the design of MOF-based materials for antibiotic removal.
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