Frontiers in Plant Science
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2026
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IF 5.9
Abdul Salam,Muhammad Rehman,Zeya Deng,Shiqi Zhu,Xin Wang,Jinzhe Chang,Muhammad Zeeshan,Zhixiang Zhang,Chen Zhao
Introduction Soil salinity, characterized by excessive soluble salts in the root zone, affects over 950 million hectares globally and continues to expand due to climate change, seawater intrusion, and unsustainable agricultural practices. High salinity imposes osmotic and ionic stress on plants, disrupting water and nutrient uptake, inducing ion imbalance, and triggering excessive reactive oxygen species (ROS) production, which leads to oxidative damage and impaired plant growth. Nanotechnology is an emerging strategy for enhancing plant stress tolerance, and combining nanomaterials with complementary properties offers a promising approach to improve plant resilience under such conditions. Methods This study evaluated the efficacy of cerium-coated triiron tetraoxide (Fe 3 O 4 @Ce) nanocomposites (NCs) applied at different concentrations to mitigate salt stress in maize. Seedlings were subjected to 150 mM NaCl and treated with foliar-applied NCs. Growth parameters, photosynthesis, oxidative stress markers, ion homeostasis, and ultrastructural changes were analyzed. Results and Discussion Salt stress significantly reduced plant growth, biomass, and photosynthetic efficiency while increasing oxidative damage and disrupting cellular ultrastructure. In contrast, NC application enhanced biomass production, chlorophyll content, antioxidant enzyme activities, and osmolyte accumulation, while reducing malondialdehyde (MDA), superoxide (O 2 • ⁻ ), and hydrogen peroxide (H 2 O 2 ) levels. The treatment decreased Na + accumulation and increased K, Ca, and Mg uptake, improving ionic homeostasis and alleviating oxidative stress. Gas exchange parameters and stomatal structure were restored, and ultrastructural analyses confirmed recovery of mesophyll and root cell integrity. These results indicate that Fe 3 O 4 @Ce nanocomposites mitigate salt stress through coordinated regulation of antioxidant defense, ion balance, and cellular structure, highlighting their potential as an eco-friendly strategy for enhancing crop resilience.
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ACTA PHYSICO-CHIMICA SINICA
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2026
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IF 13.5
Chunyue Fang,Xiaoxuan Tan,Chunhong Wang,Yang He,Xiaoyuan Pei,Yu Zhang,Sarani binti Zakaria,Guangwei Fu,Jiangang Wang,Li Chen,Kun Liu,Ting Xu,Chuanling Si
Electromagnetic interference (EMI) increasingly constrains the development of flexible and multifunctional electronics materials, yet asymmetric structural design and functional integration remain limited. Here we report a Janus hierarchical membrane, liquid metal@polydopamine-MXene/Fe 3 O 4 @cellulose polyacrylonitrile nanofibers (LM@PDA-MXene/Fe 3 O 4 @CPNF), fabricated by electrospinning a Fe 3 O 4 -doped cellulose/Polyacrylonitrile nanofiber scaffold and vacuum-assisted assembly of MXene intercalated with core-shell LM@PDA nanoparticles. The multiscale architecture couples three loss pathways: a percolated MXene network for conductive loss, LM@PDA spacers that suppress restacking and form microcapacitors for interfacial and dipolar polarization, and a porous magnetic entrance that improves impedance matching. In the X-band, a single 70 μm layer achieved an average EMI shielding effectiveness (SET) of 45.1 dB and a thickness-normalised specific shielding effectiveness (SSE/t) = 8.87 × 10 3 dB cm 2 g -1 , stacking four layers raised SET to 70.8 dB. The membrane also provided orientation-dependent thermal functions, this ultrathin, eco-friendly, and lightweight membrane integrates absorption-dominant EMI shielding with bidirectional thermal management in a single platform, offering a practical route toward electromagnetic protection and infrared control in next-generation wearable electronics.
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ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Su Han Wang,Ning Ma,Jian Ping Wang
Background For the previous rapid screening methods, antibody, molecularly imprinted polymer, aptamer and receptor are the usually used recognition reagents. It is well known that there are many antibiotic receptors on bacterial surface, so in theory the whole bacterium can be used as recognition reagent for screening of the specific antibiotic. However, such a method has not been reported so far. The aim of the present study is to develop a method for rapid screening of beta-lactam drugs in milk with Escherichia coli as the recognition reagent and with aggregation induced emission luminogen as the signal source. Results In this study, T4 phage was coupled with Fe 3 O 4 to synthesize a type of magnetic complex that could specifically capture E . coli . Cephalexin was coupled with an aggregation induced emission luminogen (tetraphenylethylene) to synthesize a fluorescent tracer that could specifically bind with the penicillin binding proteins on E . coli surface. The magnetic complex, the E . coli solution and the tracer were mixed with beta-lactam drugs to perform competition. The fluorescent signal from the tracer molecules aggregated on bacterial surface was negatively correlated with the drug concentration. This method could be used for multi-screening of 28 beta-lactam drugs. The operation was simple and rapid, and the sensitivities for these drugs (limits of detection of 0.73-95.19 pg/mL) were improved for 16-959 folds in comparison with fluorescein based fluorescent tracer. The detection results for the real milk samples were consistent with a LC-MS/MS method. Significance This is the first study reporting the use of phage/bacterium system and aggregation induced emission luminogen for detection of antibiotic residues in food sample. Under the guidance of this study, more similar or advanced methods based on bacteria and novel signal sources for detection of antibiotics should be reported in the future.
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JOURNAL OF MATERIALS SCIENCE
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2026
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IF 4.4
Cao Xinxiu,Chen Jiateng,Kang Xiaowei,Yuan Tiancheng,Li Yanjun,Bao Minzhen,Wang Yu
With the widespread adoption of 5G communication and electronic devices, electromagnetic pollution has become a serious environmental issue. Traditional electromagnetic wave-absorbing materials face environmental challenges such as non-degradability, difficult recycling, and high energy consumption during production. This study proposes an innovative solution in line with the concept of clean production: converting bamboo processing waste into high-performance electromagnetic wave-absorbing (EMWA) materials. Through a mild hydrothermal method, Fe 3 O 4 nanoparticles are grown in situ in the multilevel pores of bamboo, successfully preparing a lightweight, degradable, and magnetic Fe 3 O 4 /bamboo composite material. This material exhibits excellent EMW performance within the frequency range of 2–18 GHz, with a minimum reflection loss of − 63.33 dB, and the effective absorption bandwidth covers 2.63 GHz. Furthermore, the application of the composite materials prepared in this study in the aerospace industry was explored through simulation software. By manifesting a “waste-to-wealth” transition, this study paves the way for advanced electromagnetic protection solutions that strictly adhere to the global mandates of clean production and long-term sustainability.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Chao Xie,Weikai. Kong,Zijian Wu,Dandan Yang,Yahui Li,Yulian Li,Jiandong Lu,Junyong He,Peidong Hong,Lingtao Kong
The filtration-assembled catalytic composite membrane enable high-density catalyst loading with improved exposure of active sites. Given the cost efficiency of iron-based catalysts, inhere, a high-density Fe 3 O 4 /Ti 3 C 2 T x @PVDF catalytic composite membrane was successfully fabricated via filtration-assembled anchoring Fe 3 O 4 nanoparticles to the superior surface of Ti 3 C 2 T x . The structural and functional properties of the composite membrane were systematically elucidated through comprehensive characterization. Leveraging the outstanding catalytic performance of Fe 3 O 4 /Ti 3 C 2 T x , efficient degradation of acetaminophen (ACT) was achieved. In the ∙OH dominated M-5 + PMS system, 93.2% ACT removal was attained within 60 min. The degradation pathways and underlying mechanisms were thoroughly investigated. Furthermore, a novel MBR + CMR system was developed for advanced treatment of pharmaceutical wastewater, significantly enhancing the removal of pollutants from secondary effluent. The hybrid system exhibited remarkable treatment efficiencies, with 91.7% TOC removal and 99.7% NH 4 + -N removal. Finally, future perspectives on scalable membrane fabrication, potential application domains, and technology integration are discussed.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ben Chen,Tingting Lin,Haibo You,Liqun Fang,Chu Chu,Jintao Yang,Shengqiang Tong
The surface of SiO 2 coated magnetic nanoparticles (NMPs) was modified by bonding with sulfobutylether- β -cyclodextrin (SBE- β -CD) via carbodiimide activation for the first time. The magnetic nanoparticles were synthesized by chemical coprecipitation method under alkaline condition, and the magnetic particles were modified by citric acid . Then the surface of obtained magnetic nanoparticles was coated with SiO 2, and SBE- β -CD modified by citric acid was bonded to the surface of Fe 3 O 4 /SiO 2 MNPs under carbodiimide activation method. The synthesized functionalized magnetic nanoparticles were characterized by X-ray Diffraction, Fourier Transform Infra-Red spectroscopy, thermogravimetric analyses and transmission electron microscopy . These functional nano-sized particles were scrutinized for enantioselective liquid-liquid extraction of five racemic drugs/intermediates, including trans -paroxol, N-methyl duloxetine , fluoxetine , tropic acid and acetyltropic acid, and it was found that compared with traditional SBE- β -CD, the present magnetic silica nanoparticles bonded with SBE- β -CD showed higher enantiorecognition with some racemates using enantioselective liquid-liquid extractions. To our knowledge, this is the first-time report on preparation and application of magnetic nanoparticles bonded with SBE- β -CD in enantioselective liquid-liquid extraction for chiral separations .
研究领域:
纳米材料
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分析化学
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手性分离
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磁性材料
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超分子化学
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·Vol. 43
·期 32
·15358-15364
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IF 4.229
Qiang Wu,Cheng Ji,Xiaohui Zhang,Qichang Pan,Jiujun Zhang,Qingyu Li,Hongqiang Wang
Core-shell Fe 3 O 4 @Fe nanoparticles embedded into porous N-doped carbon nanosheets was prepared by a facile method with NaCl as hard-template. The three-dimensional carbon architecture built by carbon nanosheets enhance the conductivity of the encapsulated Fe 3 O 4 @Fe nanoparticles and strengthen the structure stability suffering from volume expansion during extraction and insertion of lithium ions . Rich Pores enhance the surface between electrode and electrolyte, which short the transmission path of ions and electrons. The core-shell structure with Fe as core further improves charge transferring inside particles thus lead to high capacity. The as-prepared Fe 3 O 4 @Fe/NC composite displays an irreversible discharge capacity of 839 mAh g −1 at 1 A g −1 , long cycling life (722.2 mAh g −1 after 500th cycle at 2 A g −1 ) and excellent rate performance (1164.2 and 649.2 mAh g −1 at 1 and 20 A g −1 , respectively). The outstanding electrochemical performance of the Fe 3 O 4 @Fe/NC composite indicates its application potential as anode material for LIBs .
研究领域:
材料科学
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电化学
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储能
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纳米材料
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Zhenan Zheng,Yijing Ai,Xuan Zheng,Xiaohui Dai,Feng Gao,Qingxiang Wang
One-pot synthesis of PA-functionalized Fe 3 O 4 for enhanced dispersion and heavy metal adsorption. • DFT calculations reveal strong multidentate coordination between PA and Pb 2+ /Cu 2+ /Hg 2+ . • Binder-free sensor built via magnetic immobilization of Fe 3 O 4 @PA on MGCE, maximizing active sites. • Ultra-sensitive detection of Pb 2+ , Cu 2+ , and Hg 2+ with pM-level detection limits in real water. The development of advanced functional nanomaterials is critically important for constructing high-performance electrochemical sensors capable of sensitive and selective detection of heavy metal contaminants. Herein, we report a magnetic composite consisting of ferrosoferric oxide (Fe 3 O 4 ) nanoparticles functionalized with phytic acid (PA), a naturally abundant molecule bearing multiple phosphate (-PO 4 3− ) coordination groups. The Fe 3 O 4 @PA composite was synthesized via a homogeneous precipitation strategy and directly immobilized onto a magnetic glassy carbon electrode (MGCE) to fabricate a film-free electrochemical sensing interface for the simultaneous determination of Pb 2+ , Cu 2+ , and Hg 2+ . Experimental electrochemical measurements combined with density-functional theory calculations demonstrated that PA functionalization significantly enhances the affinity of Fe 3 O 4 toward heavy metal ions through strong multidentate coordination interactions, leading to markedly improved adsorption and preconcentration efficiency. Moreover, the strong magnetic attraction between Fe 3 O 4 @PA and the MGCE enabled stable electrode modification without the use of additional film-forming binders, thereby simplifying sensor fabrication while maximizing the effective adsorption surface area. Benefiting from these synergistic effects, the resulting sensor exhibited outstanding analytical performance, achieving ultra-low limits of detection of 0.015 pM for Pb 2+ , 8.13 pM for Cu 2+ , and 4.60 pM for Hg 2+ . The sensor also demonstrated excellent applicability for the simultaneous determination of Pb 2+ , Cu 2+ , and Hg 2+ in real water samples, highlighting its strong potential for practical environmental monitoring and on-site analysis. Download: Download high-res image (68KB) Download: Download full-size image
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Catalysts
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2026
·Vol. 16
·期 5
·445
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IF 4.5
Sihui Song,Chunting Li,Sadaf Mutahir,Muhammad Asim Khan,Feng Yan
The catalytic reduction of toxic 4-Nitrophenol (4-NP) to valuable 4-aminophenol is highly important for environmental remediation. However, developing catalysts with high activity, good recyclability, and facile preparation remains challenging. Herein, Ag@Fe3O4nanocomposites were controllably synthesized with a facile one-pot polyol method. By varying the Ag:Fe precursor ratio, the structure could be tuned from dense and porous core-shell to Janus architectures. The porous Ag@Fe3O4nanoreactors (Ag:Fe-0.4) exhibited exceptional catalytic performance, achieving complete 4-NP reduction within 75 s, with an apparent rate constant (k) of 6.29 × 10−2s−1, a normalized rate constant (kn) of 3742 s−1mmol−1, and a TOF value of 1042 h−1. XPS results verified that the excellent activity originated from the porous structure and interfacial charge transfer from Ag to Fe3O4. The catalysts showed super-paramagnetism and could be reused for at least eight cycles with >95% conversion retained. It also displayed high efficiency in reducing diverse nitroaromatics and in natural water. This work highlights the significance of structural and electronic modulation, providing a scalable strategy for magnetically recyclable catalysts toward environmental remediation and heterogeneous catalysis.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124924
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IF 7.5
Jing Yao,Liuqing Li,Tiefeng Xu,Wangyang Lu
As a renewable platform chemical, 2, 5-furandicarboxylic acid (FDCA) provides a sustainable alternative to petroleum-derived terephthalic acid with vital strategic importance. Achieving the efficient conversion of 5-hydroxymethylfurfural (HMF) to FDCA under environmentally friendly conditions is of great practical significance. Herein, an Au/Fe 3 O 4 /TiO 2 photocatalyst was prepared by first synthesising an Fe 3 O 4 /TiO 2 composite via a hydrothermal method, followed by amination and subsequent reduction of Au nanoparticles. Furthermore, multiple characterisations confirmed the successful loading of Fe 3 O 4 and Au nanoparticles, while abundant Fe signals were detected adjacent to the Au nanoparticles. Under simulated solar irradiation, an FDCA yield of 97% was achieved within 15 h, demonstrating the superior catalytic performance of the Au/Fe 3 O 4 /TiO 2 photocatalyst. Moreover, the photocatalytic activity remained at 85% after five consecutive cycles, indicating its excellent cycling stability and reusability. Simultaneously, superior photocatalytic activity and stability were attained owing to the strong synergistic effect among Au nanoparticles, Fe 3 O 4 and TiO 2 . In addition, the photocatalytic oxidation mechanism of HMF to FDCA over Au/Fe 3 O 4 /TiO 2 was elucidated, wherein h + , 1 O 2 and •O 2 - contributed to the production of FDCA. This study provides a promising strategy for the efficient photocatalytic conversion of HMF to FDCA under mild conditions.
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Toxics
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2026
·Vol. 14
·期 9
·757
·
IF 4.9
Changxin Li,Xiaoya Li,Jinyu Yang,Nan Liu,Shanpei Liu,Xianglong Huang,Huaxin Zhang
Tetracycline (TC) is a widely used antibiotic that is frequently detected in rivers, lakes and wastewater. Because TC is poorly removed by conventional biological treatment, its residues can harm aquatic organisms and promote the spread of antibiotic resistance; efficient and low-cost technologies for removing TC from water are therefore needed. In this study, copper smelting slag (CSS), an abundant industrial solid waste, was converted into a catalyst composed of Fe3O4particles loaded on mesoporous silica (denoted Fe3O4@MS) via an alkali fusion–hydrothermal method. The catalyst was used to activate peroxymonosulfate (PMS), forming the Fe3O4@MS/PMS treatment system for the degradation of TC in aqueous solution. The effects of the main operating parameters (catalyst dosage, PMS concentration, initial pH and reaction temperature) on TC degradation were systematically evaluated. Under the optimized conditions (catalyst 0.5 g/L, PMS 1.0 mmol/L, initial pH 6.5, 25 °C), the Fe3O4@MS/PMS system removed 98.70% of 50 mg/L TC within 60 min. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis revealed that TC was degraded through both radical pathways (hydroxyl •OH, sulfate SO4•−and superoxide O2•−radicals) and a non-radical pathway involving singlet oxygen (1O2), with •OH being the dominant reactive species. Nine degradation intermediates were identified by liquid chromatography–mass spectrometry (LC-MS), based on which three degradation pathways were proposed. Toxicity estimation indicated that ring-opening and deamination reactions are the key steps for detoxification. In addition, a life cycle assessment (LCA) across five selected impact categories identified the main environmental burdens associated with catalyst production. Overall, this work demonstrates that CSS-derived Fe3O4@MS is an efficient, low-cost and sustainable catalyst for PMS-based antibiotic removal from water, offering a circular-economy approach that couples solid-waste valorization with clean water production.
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ACS Omega
·
2025
·
IF 4.3
Yoshiaki Nomura,Manabu Kiguchi,Zhongoing Liang,Mei Ma,Akira Fujishima,Nobuhiro Hanada
The triazine herbicides simetryn and prometryn may cause damage to nontarget crops due to persistent contamination of agricultural water. Photocatalysis is a promising technology for the degradation of agricultural pollutants. This study provides the first systematic integration of photocatalytic herbicide degradation with live plant bioassay validation using cost-effective Fe3O4/SiO2/TiO2 magnetic photocatalysts synthesized by a simple coprecipitation method suitable for large-scale production. The phytotoxicity of herbicide-containing water was evaluated using pak choi, a crop sensitive to triazines. Both herbicides were completely decomposed in water within 240 min after UV irradiation, and their phytotoxicity also disappeared. In the plant toxicity evaluation, prometryn exhibited temporary high toxicity exceeding that of the untreated 10 ppm solution during the photodegradation process. In previous photocatalyst studies, evaluations relied on either chemical analysis or biological tests. In this study, we developed a new rapid toxicity screening technique using plant seedlings and established a safety evaluation protocol integrating chemical analysis and plant toxicity tests. This method represents the first approach to comprehensively evaluate the safety of agricultural water.
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