JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2026
·Vol. 74
·期 28
·22312-22323
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IF 6.7
Peng Huajie,Gao Di,Xiao Zhengyue,Yue Zhixiang,Xu Peng,Qiu Ping
Compared with natural-enzyme-based detection strategies,
nanozymes
offer notable advantages in stability, environmental tolerance, and
cost-effectiveness. In this study, we designed and synthesized a Pt@Fe-MIL-88
composite with both oxidase (OXD)-like activity and intrinsic fluorescence.
The material efficiently catalyzes 3,3 ′ ,5,5 ′ -tetramethylbenzidine
(TMB) oxidation, generating a color change while quenching its fluorescence.
Glyphosate (Gly) specifically inhibits the OXD-like activity of Pt@Fe-MIL-88,
reducing oxTMB production and thereby alleviating fluorescence quenching,
enabling dual colorimetric and fluorometric signal readout. The inhibition
mechanism was elucidated through FTIR, XRD, XPS characterization,
molecular dynamics simulations, and DFT calculations. Accordingly,
a natural-enzyme-free, colorimetric-fluorometric dual-mode sensing
platform for Gly was established. The platform exhibits high sensitivity,
excellent selectivity, and strong anti-interference capability, with
accuracy and reliability validated by spike recovery tests in real
samples. This work presents a new strategy for developing stable,
rapid, and low-cost multimodal detection methods for pesticide residues.
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Nature Communications
·
2026
·
IF 18.1
Yun Gao,Hao Yao,Xiaoyue Zhang,Hang Zhang,Xihao Lin,Bin Yang,Jinkui Li,Yameng Fan,Sean C Smith,Longhai Zhang,Xin Tan,Chaofeng Zhang,Shulei Chou,Zaiping Guo,Li Li
Fe-based Prussian blue analogs are promising positive electrodes for sodium-ion batteries due to their open framework and high theoretical capacity, yet suffer from structural degradation caused by interstitial water, lattice distortion, and irreversible phase transitions. Here we show a selection principle for alkali metal ion lattice engineering, based on geometric matching, hydration energy, and Fe-N bonding strength, to design high-energy, long-life positive electrodes. We demonstrate that immobilizing Cs + ions at the alkali metal sites enhances the structural and electrochemical stability of iron-based Prussian blue analogs. The introduced Cs + pillars alleviate lattice contraction, suppress framework distortion, enhance Fe-N covalency, and reduce crystal water content. These modifications promote sodium ion diffusion and charge transfer kinetics, especially across phase transition regions. Consequently, the optimized positive electrode delivers a high capacity retention of 81.48% after 1000 cycles at 750 mA g −1 and maintains 77.55% of its capacity at a high specific current of 7500 mA g −1 . It also exhibits good air stability and wide-temperature performance. A proof-of-concept pouch cell demonstrates its practical viability. This work establishes a viable selection principle for alkali-metal-site regulation, advancing the development of long-life, high-energy Prussian blue positive electrodes for large-scale sodium-ion battery applications. Fe-based Prussian blue positive electrodes for sodium-ion batteries often suffer from stability issues. Here, the authors establish an alkali metal-site selection principle involving Cs⁺ ions to enhance structural stability, enabling long-life positive electrodes with performance further validated in a pouch cell.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Jie Ding,Jing Zhang,Boxia Liu,Yuyu Wang,Dongxu Han,Yeqiong Huang,Chuhan Xing,Zhi Song
MnFe-O activates PMS to remove 99.34% phenol within 30 min. • Oxygen vacancies regulate Mn-Fe dual-site electronic coupling. • MnFe-O shows higher Fe 2+ and Mn 3+ contents for rapid redox cycling. • O 2 •− / 1 O 2 -coupled pathways dominate phenol oxidation in MnFe-O/PMS. • MnFe-O/PMS maintains high activity in diverse real water matrices. Peroxymonosulfate (PMS) activation technology has significant application potential in the removal of phenolic pollutants, but its catalytic performance is still limited by problems such as insufficient regulation of the electronic structure of active sites and unclear interfacial reaction pathways. This study used MnFe Prussian blue analogue (MnFe-PBA) as a precursor to construct a series of MnFe-X (X = O, S, Se) catalysts through thermal conversion and oxygen vacancy-related defect engineering, and systematically compared the effects of different vacancy types on the PMS-activated degradation performance of phenol. The results showed that the MnFe-O sample, which was jointly regulated by oxygen vacancy-related defects and structural reconstruction, exhibited the best catalytic activity, achieving 99.34% phenol removal within 30 min, with an apparent rate constant as high as 0.20 min −1 , which was significantly better than the MnFe-PBA and S/Se vacancy-regulated samples. XPS analysis showed that the increased proportions of Fe 2+ (77.25%) and Mn 3+ (70.00%) in MnFe-O created a more favorable local electronic environment for electron coupling and redox cycles. EPR and quenching results indicate that •OH, SO 4 •− , O 2 •− and 1 O 2 are generated simultaneously in the system, and an oxidation pathway dominated by O 2 •− / 1 O 2 coupling is ultimately formed. This work reveals the key role of oxygen vacancy-related defects and structural reconstruction in jointly regulating the activation of PMS by Mn-Fe dual sites, providing a new mechanistic basis for defect engineering-driven bimetallic catalyst design and efficient purification of phenolic wastewater. Download: Download high-res image (230KB) Download: Download full-size image
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JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·
IF 15
Quan Liao,Shichao Zhang,Yuhan Xie,Qidan Tan,Tengfei Li,Shushuai Yang,Chenglong Xu,Zhouting Tuo,Rui Yao,Longchao Zhang,Haiwen Zhou,Yuanjiong Qi,Shiyong Qi
Background Acute kidney injury (AKI) remains a major clinical challenge and is largely driven by excessive oxidative stress, inflammatory responses, and tubular cell apoptosis. However, effective therapeutic strategies that simultaneously target these pathological processes are still lacking. Results We developed a pH-responsive ultrasmall Fe–kaempferol (Fe–Kae) nanoplatform with coordinated antioxidant and anti-inflammatory activities for AKI treatment. Owing to their ultrasmall size and pH-responsive properties, Fe–Kae nanoparticles preferentially accumulated in injured renal tissues and exhibited robust renoprotective effects in multiple murine AKI models, including ischemia–reperfusion injury, cisplatin-induced nephrotoxicity, and calcium oxalate–induced kidney injury. Integrated transcriptomic and metabolomic analyses of ischemia–reperfusion–injured kidneys revealed that Fe–Kae treatment markedly enhanced efferocytosis-associated pathways and induced coordinated metabolic reprogramming, characterized by optimized tricarboxylic acid cycle activity and enhanced glutathione metabolism. Conclusions This study establishes a nanomedicine-based therapeutic strategy that couples efferocytosis enhancement with metabolic reprogramming to achieve effective renoprotection. Our findings highlight pH-responsive ultrasmall metal–polyphenol nanoplatforms as a promising paradigm for the treatment of AKI. Graphical Open in a new tab Graphical Supplementary Information The online version contains supplementary material available at 10.1186/s12951-026-04534-8.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Tariq Ali,Shahid Khan,Yiwei Li,Tariq Bashir,Bingjie Fang,Saleem Raza,Yeyuan Xiao
Urea-assisted water electrolysis offers a promising strategy for energy-saving hydrogen production with simultaneous wastewater valorization. Herein, a self-supported Fe-decorated Ni 3 S 2 nanosheet electrode on nickel foam (Fe–Ni 3 S 2 /NF) was prepared by hydrothermal growth followed by Fe electrodeposition. Structural characterization confirmed Fe introduction preserved the Ni 3 S 2 phase while inducing surface/electronic modulation. Electrochemically, Fe–Ni 3 S 2 /NF exhibited enhanced hydrogen evolution activity with overpotentials of 160, 222, and 259 mV at 10, 50, and 100 mA cm −2 , respectively (Tafel slope: 79 mV·dec −1 ). For urea oxidation, it delivered 10, 50, and 100 mA cm −2 at 0.97, 0.99, and 1.01 V, reducing the anodic potential by ∼0.62 V vs. OER at 100 mA cm −2 . A symmetric Fe–Ni 3 S 2 /NF || Fe–Ni 3 S 2 /NF electrolyzer required only 1.58–1.86 V for 10–100 mA cm −2 and operated stably for 50 h at 50 mA cm −2 , demonstrating a scalable noble-metal-free electrode for energy-efficient hydrogen production coupled with urea oxidation.
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Journal of Hazardous Materials Advances
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2026
·
IF 9.1
Wenqi Li,Ying Cao,Quanzhen Yang,He Liu,Stefanos Giannkis,Jin Jiang
UVA-driven iron-mediated sulfite advanced oxidation processes have demonstrated high efficiency in degrading organic pollutants, yet their potential for microbial inactivation remains underexplored. This study systematically investigates the disinfection performance and mechanism of a UVA/Fe(III)/sulfite system using Escherichia coli ( E. coli ) as a model bacterium. The ternary system exhibited synergistic bactericidal activity, achieving complete inactivation of 10 6 CFU/mL E. coli within 45 min at pH 5.6, significantly outperforming individual or binary controls. Radical quenching and electron paramagnetic resonance (EPR) analyses identified sulfate radicals ( SO 4 • − ) , hydroxyl radicals ( • OH ) , superoxide ( O 2 • − ) , and peroxymonosulfate radicals ( SO 5 • − ) as the primary reactive species, generated via a sustained photochemical Fe(II)/Fe(III) redox cycle. Mechanistic investigations revealed a multi-target oxidative cascade: initial disruption of cell envelope integrity and lipid peroxidation facilitated intracellular radical influx, leading to rapid adenosine triphosphate (ATP) depletion, inactivation of antioxidant enzymes (superoxide dismutase (SOD) and catalase (CAT)), and oxidative deoxyribonucleic acid (DNA) lesions. Disinfection efficiency increased with decreasing pH, and was promoted by elevated dissolved oxygen. While chloride and nitrate exhibited moderate interference, phosphate and humic acid severely inhibited inactivation through Fe(III) precipitation and radical scavenging/light screening, respectively. These findings elucidate the inactivation pathways of the UVA/Fe(III)/sulfite system, establishing a theoretical foundation for its application as a cost-effective, solar-driven water disinfection strategy.
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ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Saijia Dong,Renyuan Yang,Xiaonan Liu,Yue Wang,Yupeng Hu,Daohai Zhang,Teng Zhou
Lightweight, ultrathin, and absorption-dominated electromagnetic interference (EMI) shielding materials are highly desired to alleviate secondary electromagnetic pollution caused by conventional reflection-dominated shielding materials. Herein, Fe(acac) 3 -assisted PAN-derived porous carbon membranes were fabricated through nonsolvent-induced phase separation (NIPS), freeze-drying, and high-temperature carbonization to achieve efficient absorption-dominated EMI shielding performance. The interconnected porous conductive carbon framework facilitated the dissipation of incident electromagnetic waves by providing continuous conductive channels and abundant internal scattering interfaces. Different Fe(acac) 3 contents were introduced to evaluate their influence on graphitization degree, electrical conductivity, and EMI shielding performance. Notably, with only 1 wt% Fe(acac) 3 loading, the obtained C-P-P/AcFe-2 membrane with a thickness of only 0.42 mm exhibited the best overall shielding performance, including an electrical conductivity of 7.12 S mm −1 , exhibiting an average EMI shielding effectiveness of 94.9 dB and a corresponding SE A value of 80.2 dB in the X-band. The SE A /SE R ratio reached 5.5, indicating obvious absorption-dominated shielding behavior. Meanwhile, the SSE t value reached 4013.4 dB cm 2 g −1 , demonstrating its lightweight shielding capability. This work provides a feasible approach for developing lightweight, ultrathin, low-filler-loading, and absorption-dominated EMI shielding materials. Download: Download high-res image (272KB) Download: Download full-size image A lightweight and ultrathin porous carbon membrane was developed by introducing Fe(acac) 3 as a molecular-level precursor to construct an interconnected conductive network and magnetic components. The optimized membrane achieves absorption-dominated EMI shielding with a shielding effectiveness of 94.9 dB and an absorption contribution of 80.2 dB at a thickness of only 0.42 mm.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiaojun Zhou,Wenwen Yang,Chunmei Zeng,Hejun Gao,Yunwen Liao,Kunpeng Song
·N-doped Fe 3 O 4 @CNTs with Fe-Nx and oxygen vacancies was fabricated for efficient ORR electrocatalysis. • The catalyst shows onset potential of 0.87 V and superior stability toward oxygen reduction reaction. • Zinc–air battery delivers 173.90 mW·cm −2 power density and stable running for 280 h. • Synergy of oxygen vacancies and Fe-Nx sites boosts ORR activity and structural stability. A composite catalyst consisting of Fe 3 O 4 nanoparticles coated with nitrogen-doped carbon nanotubes (Fe 3 O 4 @CNTs) was synthesized via in situ pyrolysis using heme-modified CNTs. Benefiting from the CNT coating and oxygen vacancies, the catalyst exhibits a half-wave potential of 0.88 V for oxygen reduction in alkaline media, with stability surpassing commercial Pt/C. In zinc-air batteries, it achieves a power density of 173.90 mW·cm −2 and maintains stable operation over 280 h. Experimental and theoretical studies reveal that the CNT coating provides a 3D conductive network, prevents Fe 3 O 4 agglomeration, and modulates the electronic structure of the active-sites via Fe–N interactions. Meanwhile, abundant oxygen vacancies are introduced into Fe 3 O 4 , optimizing O 2 adsorption and reducing reaction barriers. This work offers new insights into the design of iron-based oxide electrocatalysts with high activity and durability for renewable energy applications.
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Science Bulletin
·
2026
·
IF 20.7
Qiaohui Chen,Xiaohong Ying,Ziyu Wu,Chenxi Miao,Wan Zeng,Yikai Cai,Yayun Nan,Qiong Huang,Kelong Ai
Intracellular metal ion homeostasis, particularly the precise regulation of mitochondrial iron and calcium, is essential for maintaining energy metabolism and cell survival. Once disrupted, iron-mediated oxidative reactions and calcium overload mutually amplify, rapidly leading to mitochondrial dysfunction and cellular injury. In acute kidney injury (AKI), this mitochondria-centered iron–calcium imbalance represents a critical pathological axis driving oxidative stress, programmed cell death, and inflammation. However, effective therapies that coordinately regulate both processes are not yet available. Herein, we developed a polyvinylpyrrolidone (PVP)-coated Mg–Fe cyanometallate framework nanozyme (MFC) to calibrate iron–calcium homeostasis in AKI. The PVP coating facilitates its interaction with the highly expressed Megalin receptor in renal proximal tubular epithelial cells, promoting receptor-dependent endocytosis and tubular-targeted delivery. Built on a Prussian blue–like coordination framework, MFC efficiently captures bioactive iron to suppress oxidative stress, while its ion-exchange process concurrently releases Mg 2+ , acting as a physiological calcium antagonist that regulates mitochondrial calcium homeostasis. By stabilizing mitochondrial structure and function, this strategy suppresses the cascade amplification of cell death and inflammatory signaling, significantly ameliorating renal injury in AKI. This study proposes a therapeutic approach for AKI by rewiring mitochondrial iron–calcium imbalance and offers a design paradigm for multifactorially coupled diseases. Download: Download high-res image (264KB) Download: Download full-size image
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Surfaces and Interfaces
·
2026
·
IF 6
Sawaira Adil,Muhammad Naveed Afridi
Novel FMAB-MX beads were developed for efficient phosphate removal and recovery. • The Langmuir maximum phosphate adsorption of 155 mg P g⁻¹ was achieved. • Pseudo-second-order kinetics confirmed a chemisorption process. • Phosphate binding via electrostatic attraction and Fe/Mg chemisorption. • FMAB-MX achieved ∼90% phosphate recovery with excellent reusability. The present study explores a novel Fe/Mg-functionalized alginate–MXene composite bead (FMAB-MX) as an efficient adsorbent for phosphate removal and recovery from water. The physicochemical properties and surface chemistry of FMAB-MX were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) to elucidate its structural characteristics and adsorption mechanisms. FMAB-MX achieved phosphate removal efficiency of up to 82% in batch tests, demonstrating approximately 64- and 20-fold higher removal efficiency than MXP and MXB, respectively. FMAB-MX exhibited a maximum adsorption capacity of 155.1 mg P g⁻¹ (475.3 mg PO₄ g⁻¹), whereas FMP-MX showed 64.2 mg P g⁻¹ (196.8 mg PO₄ g⁻¹). Isotherm and kinetic modeling showed that phosphate adsorption onto FMAB-MX was best described by the Langmuir isotherm and pseudo-second-order model, respectively, suggesting monolayer adsorption behavior. FMAB-MX also exhibited high resistance to interference from inorganic anions commonly found in natural water. Furthermore, approximately 89% of the adsorbed phosphate was recovered under mild alkaline conditions, demonstrating excellent reusability and stability over five successive cycles. These findings indicate that FMAB-MX beads represent a sustainable and efficient adsorbent for nutrient recovery and advanced water treatment applications while providing a novel contribution to the still-limited literature on alginate-crosslinked MXene composites for phosphate removal and recovery. Download: Download high-res image (256KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Mutian Zhang,Ziying Ji,Xing Wang,Yulin Ouyang,Zening Yang,Siyuan Zhou,Miao Zeng,Wei Zheng,Jiajia Wang,Guobing Ying
Understanding the catalytic mechanisms of the alkaline hydrogen evolution reaction (HER) is essential for the rational design of efficient catalysts. In this work, Fe/Ni-doped Co 3 O 4 systems were investigated by combining DFT+U calculations with experimental validation. Theoretical simulations reveal that both dopants induce spin-state transitions in Co 3+ , tune orbital hybridization, and redistribute reaction energy barriers across elementary steps rather than uniformly lowering them on the Co 3 O 4 (110) surface. Hydrothermally synthesized Fe-Co 3 O 4 and Ni-Co 3 O 4 microflower spheres confirm these predictions: Ni doping lowers the overall reaction barrier by optimizing the electronic structure and adsorption energetics associated with high-spin Co 3+ , leading to a reduced onset overpotential, whereas Fe doping facilitates water dissociation via enhanced spin polarization, thereby lowering the rate-determining barrier and improving kinetics at high current densities. Further analyses identify reliable descriptors for different catalytic advantages: the overall reaction barrier, d -band center, and covalent bonding degree of water adsorption serve as indicators of thermodynamically favorable catalysts with low overpotential, whereas the rate-determining step barrier and d-p coupling are key descriptors of kinetically favorable catalysts with enhanced current-density performance. This study clarifies the step-specific roles of spin-state modulation and provides a framework for catalyst design based on energy barrier redistribution.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiaxin Gao,Zhuo Zhu,Qi Li,Yan Nie,Xian Wang
A complete, dense coating is essential for reducing eddy current losses in soft magnetic composites (SMCs) and improving their overall performance. In this study, 3-aminopropyltriethoxysilane (APTES) was utilized to modify the surface of Fe-Si powders through organosilane functionalization, followed by the hydrolysis-condensation reaction of tetraethyl orthosilicate (TEOS) to form a SiO 2 insulating layer. TEM, powder resistivity and electrochemical testing indicate a complete and dense surface coating on the powder. Furthermore, the surface modification of the powder with APTES reduces the impact of excess non-magnetic phase coating on the magnetic hysteresis loss of soft magnetic powder cores, which facilitates the regulation of magnetic permeability to obtain powder core samples with low loss and high direct current (DC) bias performance according to corresponding specifications. Experimental results show that for APTES-modified powders, when the TEOS dosage is 5 wt%, the fabricated soft magnetic powder core with a permeability grade of 60 μ exhibits excellent comprehensive performance: a DC bias retention of 70.7% at 100 kHz/100 Oe, a core loss of 1141 mW/cm 3 at 100 kHz/100 mT, and a low permeability temperature coefficient of 30 ppm/°C within −20 °C to 140 °C, indicating temperature stability. This study provides guidance on the fabrication of high-power, high-current soft magnetic powder cores and on controlling magnetic permeability specifications while minimizing losses.
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