ACS Sustainable Chemistry & Engineering
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2026
·
IF 7.6
Tao Wang,Qiudi Zhang,Xupeng Zhu,Yasi Wang,Mengjie Zheng,Jing Wang,Wenbo Liu,Yahui Wang,Xiaojun Pan,Huimin Shi
Transition-metal-based catalysts with asymmetric coordination structures are promising candidates for industrial oxygen evolution reactions. However, the large-scale synthesis of catalysts with precisely constructed asymmetric coordination structures is still challenging. Herein, we developed an industry-compatible roll-to-roll combustion technology to synthesize NiFc–MOFs with reasonably constructed asymmetric Fe–O–Ni coordination. Owing to the modulated electronic spin states, regulated adsorption configurations of oxygen-containing intermediates, and charge redistribution, the as-prepared NiFc–MOF achieved ultralow overpotentials of 196 mV and 257 mV at η10 and η1000, respectively. The long-term stability evaluation of catalysts in a three-electrode system demonstrates excellent durability of 2000 h at 2 A cm–2. Further, the assembled anion exchange membrane water electrolyzer (AEMWE, NiFc–MOF||R–Ni) operated at a current density of 1 A cm–2 achieved high overall water splitting with a low cell voltage of merely 2 V and maintained outstanding durability for over 500 h under ambient atmosphere. More importantly, the NiFc–MOF maintained high stability for over 250 h at 1 A cm–2 in simulated seawater. This study offers a reliable pathway to the large-scale synthesis of low-cost NiFe-based catalysts for ampere-level oxygen evolution in both pure and seawater.
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Nanomaterials
·
2019
·Vol. 9
·期 2
·E210
·
IF 4.034
Qingtong Zhang,Mingfu Li,Chenyan Guo,Zhuan Jia,Guangcong Wan,Shuangfei Wang,Douyong Min
Lignin is the second largest naturally renewable resource and is primarily a by-product of the pulp and paper industry; however, its inefficient use presents a challenge. In this work, Fe₃O₄ nanoparticles loaded on lignin nanoparticles (Fe₃O₄@LNPs) were prepared by the self-assembly method and it possessed an enhanced peroxidase-like activity. Fe₃O₄@LNPs catalyzed the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H₂O₂ to generate a blue color, was observable by the naked eye. Under the optimal conditions, Fe₃O₄@LNPs showed the ability of sensitive colorimetric detection of H₂O₂within a range of 5⁻100 μM and the limit of detection was 2 μM. The high catalytic activity of Fe₃O₄@LNPs allows its prospective use in a wide variety of applications, including clinical diagnosis, food safety, and environmental monitoring.
研究领域:
生物化学
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纳米材料科学
·
分析化学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Ying Liu,Deli Wu,Shuhan Peng,Yong Feng,Zhigang Liu
Cu-Fe-O nanoparticles (CFO NPs), synthesized with zero-valent iron (ZVI) and Cu(NO 3 ) 2 as the metal precursors, were used to enhance ozonation to degrade dimethyl phthalate (DMP). Great DMP degradation and mineralization rates were achieved in a wide range of the initial pH values (3–9); the amount of OH in catalytic ozonation was much higher than that of O 3 alone at the initial pH of 5.70. The generation of hydroxyl radicals ( OH), methyl radicals ( CH 3 ) and superoxide radicals (O 2 − ) were identified and OH mainly contributed to DMP removal. The potential of Fe(III)/ Fe(II) and Cu(II)/ Cu(I) cycles have largely been overlooked, which was found to be the key for producing more OH in CFO/O 3 system. The underlying mechanisms were probably initiated by a chain reaction: initiated O 3 reaction with Cu(I)/ Fe(II) OH to form OH and O 2 − , accelerated reaction between Cu(II)/ Fe(III) and the in situ generated O 2 − with a relatively high reaction constant, redox reaction between Cu(I) and Fe(III), OH oxidizing reaction with DMP to produce CH 3 . In addition, different degradation pathways of DMP were proposed based on the intermediates in the presence of CH 3 . This study sheds new light on the specific radical chain reaction mechanisms of catalytic ozonation.
研究领域:
环境科学
·
化学工程
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chunxia Yao,Wei Song,Xuesheng Wang,Sai Huang,Yangyang Lu,Jiaxin Zhou,Weiguo Song,Zhijie Zhang
This study presents an innovative nanocomposite film with multiple synergistic sterilization modes, which aims to enhance the freshness of fruits and reduce wastage by capitalizing on the availability of sunlight. In detail, α-Fe 2 O 3 /g-C 3 N 4 (FOCN) nanocomposite with excellent visible-light-harvesting ability and photodynamic antibacterial activity was fabricated, which was then filled within a chitosan (CS) matrix, resulting in a novel antibacterial film for food preservation. The obtained α-Fe 2 O 3 /g-C 3 N 4 /chitosan (FOCN/CS) film exhibited impressive antibacterial activities, with sterilizing rate of 99.7 % ± 0.6 % against Escherichia coli ( E. coli ) and 97.6 % ± 0.4 % against Staphylococcus aureus ( S. aureus ) with short processing time (10 min) under visible light illumination. Based on this, the FOCN/CS film demonstrated excellent food preservation performance, which significantly prolonged the shelf life of strawberries, baby bok choy and pork. Such satisfactory preservation ability originates from the synergistic effect of α-Fe 2 O 3 and g-C 3 N 4 , which formed S-type heterojunction and bestow the FOCN/CS film with superior photodynamic antibacterial activity. Therefore, the film provides a novel microbiological control barrier for food preservation, with the potential to effectively reduce microbiologically induced food spoilage problems.
研究领域:
食品科学
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纳米技术
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材料科学
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抗菌技术
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食品保鲜
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光动力疗法
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Lei Huang,Xue Zou,Ensi Li,Dongmei Wang,Imran Shakir,Xuping Sun,Zhengjun Gong
Advanced oxidation process of inorganic peroxide activation is regarded as an effective and reliable method for antibiotics removal. In this paper, we report on the development of Fe-O-coordinated porous honeycomb carbon nanofiber (Fe-O-HCNF) as a high-performance catalyst for rapid degradation of tetracycline (TC) by activation of peroxymonosulfate (PMS). The effects of Fe-O-HCNF dose, PMS concentration, and initial pH were systematically investigated. The results showed that such Fe-O-HCNF achieved a high TC degradation efficiency of 84.7% within 15 minutes. Notably, complete TC degradation (100%) was achieved within 8 minutes at an low catalyst dosage of 0.08 g/L. The Fe-O-HCNF possessing exceptionally high specific surface area of 691.501 m²g-1 provides abundant adsorption and activation sites for the degradation reaction, while the introduction of iron is essential for the continuous activation of PMS. The electron paramagnetic resonance and quenching experiments results indicated that, in addition to sulfate (•SO4−) and hydroxyl (•OH), both singlet oxygen (1O2) and superoxide (•O2−) contribute to the degradation of TC. More interestingly, the Fe-O-HCNF /PMS system showed almost no interference in the real water matrices and various initial pH conditions. Importantly, no metal ion leaching was detected in the treated effluent, indicating minimal secondary environmental contamination risks from heavy metal leaching.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·462
·
IF 5.4
Zhao Yunfei,Fang Jiale,Zhang Baofeng,Wang Yan,Wu Lianbin,Pan Qinghua,Zhou Ziyun,Jiang Kezhi
A superhydrophobic magnetic nanomaterial, Fe 3 O 4 @C16&TMS, was synthesized by hexadecylating the surface of the Fe₃O₄ nanoparticles and sealing the residual hydroxyl groups. The nanomaterial exhibits a high specific surface area of 45.3 m²/g, and superhydrophobicity with a water contact angle of 158.11°. The high specific surface area offers numerous adsorption sites, and the superhydrophobic characteristics of the synthesized nanomaterial can selectively enrich non-polar volatile methylsiloxanes (VMSs) through hydrophobic interactions, thereby significantly enhancing extraction efficiency and reducing matrix interference. Notably, no significant decline in performance was observed after 6 consecutive reuse cycles. Based on this material, a rapid and simple method for the determination of VMSs in water was developed using magnetic solid-phase extraction (MSPE) coupled with gas chromatography-mass spectrometry (GC-MS) analysis. The method enabled effective extraction of VMSs from water within 20 min, achieving recoveries ranging from 70.4% to 117.0%. The method limit of quantitation (LOQ) was 0.004 ng/mL, with intra-day precision (RSD) ranging from 0.9% to 3.9%. Analysis of real water samples revealed contamination in all 16 selected water bodies, with five specific VMSs species detected at concentrations ranging from 0.01 to 0.52 ng/mL. In summary, the proposed method enabled rapid and simple determination of VMSs in water samples, demonstrating significant potential for environmental analysis applications. Graphical abstract The alternative text for this image may have been generated using AI.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 5
·135
·
IF 3.5
Guo Hao,Zhang Baowen,Bai Ziwei,Miao Rusen,Zhang Kaiyue,Wang Meng,Tian Fei
A rapid, sensitive, and convenient surface-enhanced Raman spectroscopy (SERS) substrate was developed using Fe₃O₄/C as the magnetic core and SiO₂-SH as the shell for the detection of aflatoxin B1 (AFB1). Ultra-small Fe₃O₄/C nanoparticles (NPs) with an average size of 6.30 ± 0.68 nm and excellent magnetic responsiveness were synthesized via a one-pot hydrothermal method, followed by the deposition of a uniform SiO₂ shell, followed by thiol-group functionalization to yield Fe₃O₄/C/SiO₂-SH. The magnetic core enables instantaneous separation of the substrate from solution after AFB1 adsorption, eliminating the need for centrifugation or filtration. When employed as a SERS substrate, significant enhancement of the characteristic Raman peak at 1482 cm⁻ 1 was observed across AFB1 concentrations of 0.1–10 μg/mL. Notably, the peak intensity at 10 μg/mL exceeded that of solid AFB1 powder. Comprehensive characterization (TEM, XRD, FTIR, XPS, and vibrating sample magnetometry) confirmed the core–shell structure, high crystallinity, and strong magnetic properties. The prepared Fe₃O₄/C/SiO₂-SH nanocomposite offers a low-cost, easily recyclable, and noble-metal-free platform, demonstrating strong potential for trace AFB1 monitoring in herbal medicines and food products.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2026
·
IF 5.9
Zhengyi Sun,Weijia Li,Xin Wang,Hongyu Wu,Xiaofei Wang,Yifei Shen,Dong Zhou
A novel ATT/γ-Fe₂O₃ nanoparticle was synthesized via the alkaline co-precipitation method. • Submicro/nanofibrous membranes incorporating ATT/γ-Fe₂O₃ particles can respond to external magnetic field stimuli. • Moderate-strength static magnetic field enhanced bone regeneration and vascular repair. • In vivo studies suggested that the BMP2-Smad-RUNX-2 signaling pathway was involved in the improvement and healing of cranial bone defects in rats. Currently, the development of multifunctional scaffolds that synergistically promote osteogenesis and angiogenesis remains a significant challenge in bone tissue engineering. It is increasingly recognized that scaffolds composed of a single material or possessing a single function are often inadequate, as they fail to mimic the complex biochemical and physical microenvironments. In this study, we successfully fabricated a submicro/nanofibrous membrane using electrospinning technology, which creates a biomimetic extracellular environment through a polycaprolactone (PCL) / gelatin (GEL) matrix. The incorporation of attapulgite (ATT) supplies essential osteogenic ions, while γ-iron oxide (γ-Fe₂O₃) facilitates mesenchymal cell differentiation and imparts magnetic responsiveness. Co-culturing the membranes with human umbilical vein endothelial cells (HUVECs) and bone marrow mesenchymal stem cells (BMSCs) revealed that the membranes possessed strong biocompatibility and promoted osteogenic differentiation and angiogenesis. Both in vivo and in vitro studies suggested the involvement of the BMP2-Smad‑RUNX‑2 signaling axis in the effects of the PG/ATT/γ‑Fe₂O₃ scaffold, which also upregulated osteogenesis‑related gene expression under a magnetic field. This work offers new insights and provides a scientific foundation for advancing the use of functionalized nanomaterials in the field of bone tissue engineering.
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Shi-Yu Lu,Chuan Li,Longyu Qiu,Yan Zhang,Jiaming He,Minqi Liang,Xin Peng,Jun Zhang,Yin Liu,Juan Liu,Chuan Tan,Menggang Li,Meng Jin
Targeted regulation of electrocatalyst reconstruction during the oxygen evolution reaction (OER) under alkaline conditions proves essential to achieving highly efficient hydrogen production via electrochemical water splitting. Yet this remains a considerable challenge. Herein, we prepare an iron nickel phosphate (Fe-NPO) catalyst, which possesses substantial oxygen vacancies and an asymmetric Fe-O(P)-Ni coordination structure. This structural merit facilitates the effective deep reconstruction of Fe-NPO, which then transforms into the highly active Fe-Vo-P-NiOOH active phase during OER. For the reconstructed Fe-Vo-P-NiOOH, it effectively tunes the d-band center, bringing it notably closer to the Fermi level. This type of electronic modulation not only strengthens the water adsorption capacity but also optimizes the rate-determining step (RDS) in the OER pathway. The anion-exchange membrane water electrolyzer (AEMWE) integrated with the Fe-NPO catalyst as an anode catalyst achieved high industrial current densities of 500, 1000, 1500 and 2000 mA cm-2 at low applied voltages of 1.68, 1.76, 1.84 and 1.92 V, respectively. This work presents a strategy to realize the deep and efficient conversion of OER catalysts into highly active components through defect engineering and asymmetric coordination regulation, while also confirming Fe-NPO’s considerable potential for practical hydrogen production scenarios.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122405
·
IF 7.5
Xiangwu Meng,Liangji Xu,Jianjun Li,Xuekai Wang,Junshu Wu
Loofah sponge carbon (LOC) was employed as a three-dimensional scaffold and magnetized through alkaline hydrothermal treatment followed by co-precipitation to obtain magnetic loofah sponge carbon (MLOC). Subsequent lanthanum incorporation produced La₃-MLOC, which integrates a hierarchically porous architecture with magnetic separability for phosphate removal from complex waters. La₃-MLOC delivered a Langmuir capacity of 117.32 mg/g at pH 3 and showed rapid uptake across pH 3–6, achieving > 90% removal within 15–40 min while maintaining good tolerance to common coexisting ions. Kinetic fitting (PSO and Avrami, n ≈ 0.82) suggests a predominantly site-specific chemisorption pathway. Microscopic and spectroscopic analyses support La–OH-mediated hydroxyl displacement/inner-sphere complexation, accompanied by partial LaPO₄ precipitation. The sorbent retained high performance over four adsorption–desorption cycles (removal about 92%; desorption about 77%). When evaluated using real effluent from a coal-mining subsidence outfall, La₃-MLOC enabled low-level phosphate polishing to Class III targets at low dosage and short contact time, with an estimated treatment cost of 0.341 USD/g, indicating its potential for end-of-pipe phosphate control and resource-oriented management.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhengtao Jia,Yuxiang Zhu,Qiufan Sun,Xiang Zhong,Yan Wang,Sai Xu,Jianfeng Yao
This study presents the design and synthesis of isostructural metal coordination polymers (MCPs) incorporating iron and hexaazatrinaphthalene ligands functionalized with different substituents (FeHATN-X, X = NO 2 , CN, Br). The ligand variations enable fine-tuning of geometric structures, pore environments, and electronic properties due to the polarity and intraframework interactions. Among them, FeHATN-NO 2 exhibits an enhanced electrocatalytic ammonia yield rate of 87 μg h −1 mg −1 with a Faradaic efficiency of 24 % at −0.4 V vs. RHE, outperforming its counterparts. Comprehensive characterizations reveal that the nitro substituent promotes smaller nanorod formation, increasing active site exposure and improving mass transport. Moreover, the establishment of Fe−O coordination sites can modulate the Fe center, facilitate stronger nitrogen adsorption and concurrently suppress the competing hydrogen evolution reaction, thereby collectively contributing to improved electrocatalytic activity. Furthermore, in-situ spectroscopic analysis confirms that iron coordination centers act as effective electron acceptors, facilitating the formation of *NH 2 intermediates at the Fe center. The system achieves peak efficiency at −0.4 V vs. RHE, where the conduction band potential promotes the involvement of free electrons in the reaction. This work underscores the potential of tailoring coordination environments and morphologies in MCPs to enhance electrocatalytic ammonia synthesis performance.
研究领域:
材料科学
·
电化学
·
无机化学
·
催化
·
纳米技术
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DESALINATION
·
2026
·
IF 9.9
Jingbo Su,Aoqi Xing,Junxu Hu,Yun Wu,Jinghui Zhou,Jingyu Xu,Xing Wang
In response to water scarcity and energy crises, solar-driven interfacial evaporation technology offers a highly promising industrial solution for seawater desalination due to its “zero energy consumption” and environmentally friendly characteristics. The aromatic ring structure of lignin exhibits excellent light absorption properties, making it a highly suitable material for interfacial evaporation photothermal applications. This study employs electrospun lignin nanofiber membranes that have undergone high-temperature carbonization, with Fe₃O₄ nanoparticles in situ loaded onto their surfaces to form a photothermal layer. Polyvinylidene fluoride (PVDF) serves as both a binder and hydrophobic modifier, bonding at the interface with delignified wood blocks (DW). Based on this design, the fabricated LCNFs/Fe₃O₄@DW evaporator achieves an evaporation rate of 1.76 kg·m −2 ·h −1 under one standard solar irradiance, with an evaporation efficiency of approximately 88.54%, outperforming most conventional wood-based or carbon-based photothermal evaporators. Long-term cycling tests and simulated seawater evaporation experiments demonstrate the material's excellent salt resistance and purification durability. In summary, this study not only validates the application potential of lignin-based nanofiber composites in solar thermal conversion but also achieves functional integration of “solar desalination, salt resistance and scale prevention, and water purification” through precise Janus surface design. It provides a novel strategy that combines environmental sustainability with practical applicability for industrializing solar-driven interfacial evaporation technology.
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