MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yu-Zhen Wang,Xiao-Yue Kang,Ning-Na Shi,Mao-Zhong Tian,Qi-Liang Pan,Yun-Feng Bai,Langxing Chen
A Fe-MOFs/rGO/Au ternary composite to construct a competitive electrochemical immunosensor for Hg 2+ . • The porous conductive hybrid accelerates mass transfer and provides abundant antibody binding sites. • The established immunosensor exhibits two linear range of 0.05–200 and 250–2500 nM of Hg 2+ . • The established immunosensor displays the specific selectivity and a low LOD of 0.075 nM. • The sensing platform shows the promising potential for environmental heavy metal monitoring. The development of ultrasensitive Hg 2+ detection in water environments is crucial owing to its severe toxicity to ecosystems and human health. In this work, a label-free competitive electrochemical immunosensor was fabricated for the detection of mercury ions (Hg 2+ ) based on a ternary iron-based metal organic framework/reduced graphene oxide/gold nanoparticles (Fe-MOFs/rGO/AuNPs) nanocomposite. The Fe-MOFs/rGO hybrid composite was synthesized via a hydrothermal strategy, which significantly enhanced the conductivity and effective surface area of the electrode interface. Furthermore, L-cysteine-mediated AuNPs were covalently conjugated to the Fe-MOFs/rGO matrix, which not only offered a stable substrate for the immobilization of anti-Hg 2+ antibodies but also accelerated interfacial electron transport. By monitoring the current response through differential pulse voltammetry (DPV), the immunosensor exhibited the two linear ranges of 0.05–200 nM and 250–2500 nM toward Hg 2+ , accompanied by an ultralow detection limit (LOD) of 0.075 nM. Benefiting from the synergistic effect of the ternary nanocomposite as well as the outstanding specificity of antibody-antigen immunorecognition, the developed immunosensor meets the requirement for the safety monitoring Hg 2+ in complex environmental water samples. Download: Download high-res image (152KB) Download: Download full-size image
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Hao Zheng,Cong Guo,Lin Lin,Hongwei Wang,Jiayue Zhang,Zeyi Jiang,Zhuojian Liang,Zhenghao Chen,Nien-Chu Lai
Efficient and durable bifunctional oxygen electrocatalysts represent a cornerstone for high-energy-density rechargeable metal-air batteries. Herein, we report a facile one-step pyrolysis synthesis of nitrogen-doped graphite carbon-encapsulated Fe/Fe 3 C heterojunction nanoparticles (Fe/Fe 3 C@NC) with a well-defined core-shell architecture. The Fe/Fe 3 C heterojunction exhibits prominent interfacial electron transfer from Fe to Fe 3 C. This electron-rich Fe 3 C phase enables superior adsorption modulation toward oxygen intermediates, thereby endowing the catalyst with exceptional bifunctional oxygen electrocatalytic activity. In alkaline media, Fe/Fe 3 C@NC outperforms platinum-group metal (PGM) benchmarks in both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), achieving a smaller OER/ORR overpotential difference than Pt/C + RuO 2 . When integrated into aqueous and flexible zinc-air batteries, Fe/Fe 3 C@NC maintains an impressive 92.6% of its initial round-trip efficiency (RTE) over 1900 h (5700+ cycles), far exceeding the PGM-based control (23.3% RTE decay within 50 h, 150 cycles). Structural characterizations confirm that Fe/Fe 3 C@NC retains its morphology and crystallinity after prolonged cycling, highlighting the critical role of the core-shell architecture in preserving structural/compositional integrity. This work not only elucidates the pivotal role of the Fe/Fe 3 C heterojunctions in enhancing bifunctional oxygen electrocatalysis but also provides a scalable carbon-encapsulation strategy for designing low-cost, high-performance, and long-lifespan non-noble metal bifunctional catalysts for next-generation metal-air batteries.
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PubMed
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Mengqi Ding,Xinhong Zhao,Yanru Li,Xuefeng Long,Hongwei Li,Dong Ji,Guixian Li
Iron-containing zeolites have shown great potential in catalyzing phenol hydroxylation with H2O2 to produce dihydroxybenzenes (catechol and hydroquinone). However, their industrial application has been hindered by low selectivity and the complexity of active-site identification. This study addresses these challenges by synthesizing a series of Fe-ZSM-5 catalysts with iron contents up to 4 wt % via an ionic liquid-assisted interzeolite transformation route. Through systematic regulation of transformation temperature and calcination atmosphere, combined with an acid treatment step, a catalytically inert benchmark sample (T180-Air) was strategically prepared and compared with three active variants (T200-Air, T180-N2, T200-N2) to achieve the isolation and identification of active sites. Employing a “differential comparison strategy”, combined with DR UV–vis, Raman, Mössbauer, XANES/EXAFS, EPR, H2-TPR, in situ FT-IR characterizations, and DFT calculations, we systematically excluded the possibility of binuclear iron species, small FexOy clusters, and distorted tetrahedral iron as primary active sites. The evidence consistently points to extra-framework octahedrally coordinated mononuclear iron as the key active species, which effectively activates both phenol and H2O2 to generate reactive intermediates. Moreover, the high-selectivity formation of dihydroxybenzenes is driven by a synergistic interaction between these mononuclear octahedral iron sites and neighboring strong acid centers. The optimal catalyst (T200-Air) achieved a phenol conversion of 46.7% and a dihydroxybenzene selectivity of 95.6% under dark conditions, with its dihydroxybenzene selectivity surpassing that of state-of-the-art Fe-based catalysts at comparable phenol conversion levels. This work elucidates the critical importance of the synergistic design between the active iron species and the local acidic microenvironment, providing clear experimental evidence and structure-performance guidelines for the rational design of high-performance iron-zeolite catalysts for selective phenol hydroxylation reactions.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yulong Xiang,Xinbin Ji,Xiaoli Dong,Yu Wang,Nan Zheng,Jialin Niu,Pei Yu,Chumin Yan
As Cr(VI) pollution intensifies, the development of efficient, eco-friendly, and sustainable treatment technologies has become a vital focus in environmental science. Photocatalytic reduction is often seen as a promising approach for removing Cr(VI), thanks to its low energy requirements and minimal environmental impact. However, traditional photocatalytic materials face significant challenges, including narrow photoresponse range and high rate of electron-hole recombination, which impede their practical efficiency. In this study, we successfully synthesized Fe-DUT-67 photocatalysts by incorporating Fe single atoms into the zirconium-based metal–organic framework (DUT-67) through post-synthetic modification. A significant enhancement in both the visible-light absorption capacity and carrier separation efficiency of the as-prepared Fe-DUT-67 has been observed, attributed to the formation of Fe-O coordination bonds between the Fe atoms and Zr-O clusters. Fe-DUT-67-2 exhibited impressive Cr(VI) reduction activity under full-spectrum illumination, with a remarkable 90% reduction efficiency of Cr(VI) within 18 min. Density functional theory (DFT) calculations shed light on the crucial role of Fe sites in promoting photoelectron transport and facilitating Cr(VI) reduction. This work not only presents an efficient photocatalytic material for alleviating Cr(VI) pollution but also provides a theoretical foundation and design principles for the development of high-performance catalytic systems utilizing single-atom modified metal–organic frameworks.
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高影响因子
RARE METALS
·
2026
·Vol. 45
·期 10
·e70590
·
IF 12.1
Beirong Ye,Chen Li,Xinhui Xia,Tengfei Zhang,Yongqi Li,Qing Li,Shangkun Jiang,Yizhong Huang,Lingjie Zhang,Xinqi Liang,Chiam Wen Liew,Yongqi Zhang
en This link goes to a English section zh This link goes to a Chinese section Improving the efficiency and stability of oxygen evolution electrocatalysts remains essential for advancing water splitting technologies. Although in situ surface reconstruction into active phases is desirable, it often leads to uncontrolled structural degradation. Herein, we demonstrate that lattice doping of Fe into Ni 2 Te 3 O 8 (NTO) pre-catalysts triggers a self-terminating surface reconstruction during OER. The deliberate incorporation of Fe introduced a higher density of unsaturated surface coordination sites and weakened the local surface crystallinity, which collectively accelerated the oxidative transformation of the NTO into an oxyhydroxide-rich active layer during electrocatalysis. During the reconstructive process, soluble tellurium species released from the host framework spontaneously adsorbed onto the evolving surface and subsequently served as stabilizing anionic units, contributing to the structural integrity of the metastable oxyhydroxide phase. Benefiting from this self-terminating mechanism, the optimized Fe-NTO catalyst exhibited remarkable oxygen evolution activity, requiring only 220 mV of overpotential to deliver a current density of 50 mA cm −2 , along with exceptional operational durability exceeding 200 h at the same current. This work highlights the critical role of doping and anionic regulation in controlling reconstruction dynamics and establishes a novel paradigm for designing durable, high-performance electrocatalysts. 摘要 en This link goes to a English section zh This link goes to a Chinese section 提升析氧反应(OER)电催化剂的效率与稳定性对推进水分解技术发展至关重要。尽管原位表面重构能够生成高活性相,但其过程常伴随不可控的结构衰退。本文报道,在Ni 2 Te 3 O 8 (NTO)预催化剂中晶格掺杂铁,可在OER过程中触发自终止的表面重构。Fe的引入增加了不饱和配位位点密度并降低了表面晶格有序性,共同促进了NTO在电催化过程中向富含羟基氧化物的高活性表面层转化。在重构过程中,从主体骨架释放的可溶性碲物种自发吸附于动态演化的表面,并作为稳定阴离子单元,有效增强了亚稳态羟基氧化物相的结构完整性。得益于该自终止机制,优化后的Fe-NTO催化剂表现出卓越的析氧性能,仅需220 mV过电位即可实现50 mA cm −2 的电流密度,并在该电流下保持超过200小时的持续稳定运行。本研究揭示了掺杂与阴离子调控在控制表面重构动力学中的关键作用,为设计高性能、长寿命电催化剂提供了新思路。
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Kailin Fu,Weijian Chen,Jianmin Liu,Jian Liang
Perovskite oxides are increasingly recognized as cost-effective catalytic materials for facilitating both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air-electrode electrode of Zn-air batteries (ZABs) and fuel cells. In this study, we have employed a non-hydrolytic sol-gel (NHSG) technique to synthesize La 0.8 Sr 0.2 Co 0.8 X 0.2 O 3-δ (X = Fe, Mn, and Ni) perovskite nanoparticles at a low temperature of 600 °C. Among these perovskite oxides, La 0.8 Sr 0.2 Co 0.8 Fe 0.2 O 3-δ (LSCFO) exhibited the highest specific surface area of 12.68 m 2 g −1 and possessed the greatest number of oxygen vacancies. Specifically, it achieved a higher half-wave potential of 0.657 V for ORR. Meanwhile, it exhibited a lower OER overpotential of 418 mV at a current density of 10 mA cm −2 , along with the smallest ΔE value of 0.991 V. When utilized as an air electrode catalyst for ZABs, LSCFO exhibits a high peak power density of 152.2 mW cm −2 and remarkable long-term cycling stability (100 h at 2 mA cm −2 ), which are close to the performance metrics of commercial Pt/C + RuO 2 catalysts. This study demonstrates the potential to enhance the bifunctional catalytic activity of LaCoO 3 -based perovskite air electrodes for ZABs through a straightforward doping approach within a NHSG process.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Bing Zhang,Qiuhua Chen,Heli Tang,Rongqing Qi,Wenxin Shi
The persistent challenges of membrane fouling and insufficient removal of emerging pollutants remain significant barriers to the widespread adoption of ultrafiltration processes. Therefore, a pre-oxidation system combining Fe(II)-activated persulfate with micro-nano bubble enhancement (MBs/Fe(II)/PS) was developed to alleviate membrane fouling and efficiently remove acetochlor (AC). The results demonstrated that, under conditions where Fe(II) and persulfate (PS) were applied at concentrations of 15 μM and 30 μM respectively, the MBs/Fe(II)/PS pre-oxidation system outperformed the Fe(II)/PS pre-oxidation system in mitigating both reversible and irreversible membrane fouling caused by natural organic matter (NOM) mixture. The superior fouling mitigation capabilities of the MBs/Fe(II)/PS system can be primarily attributed to the coagulation effect of in-situ generated Fe(III) and the oxidation mechanisms involving free radicals. Furthermore, the MBs/Fe(II)/PS pre-oxidation process effectively reduced foulant accumulation on the membrane surface while decreasing interfacial free energy between foulants and the membrane. This transition facilitated a shift from cake filtration to complete blocking or intermediate blocking modes. Additionally, the MBs/Fe(II)/PS pre-oxidation system exhibited optimal performance in degrading NOM and AC due to the presence of SO 4 •– , •OH, and 1 O 2 . This study introduces a novel pre-oxidation strategy for mitigating membrane fouling and eliminating emerging pollutants, providing a theoretical basis for the practical application of MBs-based pre-oxidation technology.
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Biying Zhong,Dingjun Wang,Xiaotong Lai,Xiao Huang,Qiaowen Wang,Xinghan Ren,Xinyue Shen,Li Liu,Tiantian Liu
In recent years, the burden of disease caused by Staphylococcus aureus and Escherichia coli infections has been significant. Currently, the development of antibiotics faces severe challenges, as the long-term misuse of traditional antibiotics has accelerated the evolution of resistance, while the pace of novel drug development lags far behind the rate of bacterial evolution. Therefore, the development of new antibacterial agents is urgently needed. This study presents a metal-organic framework composite material loaded with zinc oxide and kaempferol (MIL-101(Fe)@Zn-KF). The prepared material was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and zeta potential analysis. Peroxidase-like activity, biosafety and antioxidant property of the composite were evaluated. The in vitro antibacterial effect of the composite against Staphylococcus aureus and Escherichia coli was investigated using the plate coating method and bacterial growth curves experiment. The synthesized material exhibited multifunctionality, such as enzyme-like activity, antibacterial property and antioxidant capacity. Compared to MIL-101(Fe)@Zn, MIL-101(Fe) and kaempferol alone, the MIL-101(Fe)@Zn-KF composite demonstrated superior antibacterial effect, with inhibition rate of 98.76% and 98.34% against Staphylococcus aureus and Escherichia coli , respectively. MIL-101(Fe)@Zn-KF was able to catalyze hydrogen peroxide to generate reactive oxygen species, which synergized with the composite itself to exert bactericidal effect. Systematic evaluation of the cytotoxicity and hemolytic effect of MIL-101(Fe)@Zn-KF revealed the excellent biosafety and clinical potential of the composite. In summary, the composite material synthesized in this study combined peroxidase-like activity, antibacterial performance, antioxidant capacity and excellent biocompatibility, providing new insights for the development of efficient and safe antibacterial materials.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Sizhi Ding,Hua Ning,Weitao Shi,Ruojiang Liu,Ziqi Liu,Jiakun Yang,Yuanxin Tan,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
In this study, a three-dimensional honeycomb Fe/N-MXene composite was prepared by heating the mixture of the prefabricated honeycomb N-MXene composite with Fe 4 [Fe(CN) 6 ] 3 (referred to as PB tube). Subsequently, it was introduced to enhance the hydrogen storage properties of MgH 2 through ball milling. Experimental results demonstrate that the initial dehydrogenation temperature of the MgH 2 +Fe/N-MXene composite system is 198 °C, which is significantly lower than that of pure MgH 2 . Additionally, the absorption/dehydrogenation activation energies of MgH 2 +Fe/N-MXene composites were reduced by 50.9 kJ mol −1 and 68.1 kJ mol −1 , respectively, compared with MgH 2 . After 20 min at 100 °C, 5.14 wt% H 2 is absorbed. Mechanism analysis reveals that the presence of Fe prolongs the length of the Mg–H bond and weakens its bond energy. The unique honeycomb structure of N-MXene provides more nucleation sites for hydrogen atoms for adsorption and storage. Under the catalytic action of Fe/N-MXene composite, the hydrogen storage capacity of MgH 2 is significantly improved.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Jie Zhang,Haishun Liu,Xiang Zhang,Li Ma,Weiming Yang
The metastable energy state and abundant active sites in Fe-based amorphous alloys (FAAs) make them promising catalysts. Surface atomic states may affect the catalytic performance of FAAs as well as the internal long-range disordered atomic structure. This paper investigates how laser surface processing affects the phenol degradation performance of industrial Fe 78 Si 9 B 13 amorphous ribbon. Suitable laser processing obviously improves the phenol degradation performance, and 40 W laser processing leads to the most significantly improved kinetic rate, which reaches 0.82 min −1 , much higher compared to former Fe-based catalysts even with less catalyst dosage; moreover, the degradation rate also maintains over 98 % after 18 cycles. The lower activation energy, the abundant active sites, and more ·OH generation with suitable laser processing, are responsible for this degradation improvement. This study reports the improved phenol degradation performance of Fe-based amorphous ribbon by laser processing and further discloses related mechanisms, which provides a feasible strategy obtaining efficient and durable FAAs catalysts in improving the quality of phenol-containing wastewater.
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高影响因子
FUEL
·
2025
·
IF 7.5
Zhuxian Gao,Caihu Li,Jianli Zhang,Xiude Hu,Jingjing Ma,Qingjie Guo
The capture and catalytic performance in integrated CO 2 and utilization (ICCU) potentially contributes to reduce CO 2 emissions with low cost and high efficiency. Breaking through the limitations of conventional dual-functional materials (DFMs). Herein, Fe-CaO/NF self-assembled with nickel foam (NF) as template is designed and prepared via hydrothermal method. CaO is anchored on the Ni-foam skeleton, and Fe-Ni bimetallic sites within the CaO matrix establishes dual-active centers synergizing CO 2 chemisorption and activation. The stability and activity stability of CO 2 capture and in-situ conversion were improved, CO 2 capture capacity is 12.8 mmol/g, CO yield is 9.33 mmol/g, ∼80 % CO 2 conversion is achieved, and 100 % CO selectivity is obtained. It shows good cycle stability and high activity in 12 cycles. The synergistic effect of Fe and Ni on CO 2 adsorption and conversion was confirm by DRIFTS. The interaction between CaO and Fe is weakened by Ni, while the interaction with Fe promotes the conversion of CO 2 . In comparison, the stability and activity of the without O 2 -containing cycle are higher than those of the O 2 -containing. O 2 has a negative effect, leading to competitive adsorption between CO 2 and H 2 O in the CO 2 capture process. The H 2 O molecular layer is formed on the surface of the rod-like structure, and the reduction of the active phase is interference, resulting the regeneration of CaO was decline.
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高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 4
·250
·
IF 4.8
Yingxing Yang,Yihan Zheng,Mengyao Zhao,Xiaomei Yu,Songjie Li,Jinyou Zheng
As a renewable energy source, solar energy holds significant potential for addressing future energy and environmental challenges. Concurrently, hydrogen (H2), as a clean and renewable energy carrier, has garnered substantial attention. Photoelectrocatalytic water splitting to produce H2represents an emerging green technology for converting solar energy into hydrogen energy, which has been highly valued by researchers. The key to advancing this technology lies in identifying photoelectrode materials with high catalytic activity and stability. In this study, dendritic α-Fe was synthesized via electrodeposition at the optimal potential of −1.4 V vs. Ag/AgCl for 300 s, and the photoelectrocatalytic performance of α-Fe2O3@Fe was enhanced through partial oxidation annealing at 300 °C for 6 h. This approach effectively addressed the issue of the short carrier transport distance in α-Fe2O3. The resulting partially oxidized α-Fe2O3@Fe(300 °C, 6 h) exhibited a photocurrent density of 281.1 μA/cm2at +0.55 V vs. Ag/AgCl, which was 2.23 times higher than that of the fully oxidized dendritic α-Fe2O3(500 °C, 2 h) (125.8 μA/cm2). The influence of deposition potential on photoelectrocatalytic performance was systematically explored, and the optimal deposition potential was identified. Additionally, surface modification with 0.15 wt% Pt (ultra-low loading) was employed to further improve the photocatalytic stability of α-Fe2O3(500 °C, 2 h). After continuous operation for 2 h, the photocurrent of the surface-modified sample decreased by only 6.5%, indicating a substantial enhancement in stability.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）