JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Jilin Yan,Xi Wen,Lixiu Yin,Yueju Wang,Huiling Li,Yifeng Tu
The aggregation of amyloid-β protein (Aβ) into amyloid-β oligomer (AβO) and finally the deposition of amyloid-β fiber (AβF) in brain was found strongly related to Alzheimer's disease (AD). In this work, an electrochemiluminescent (ECL) aptasensor reinforced with a gold nanoparticle – iron metal orgaic framwork nano-composite (AuNPs/Fe-MOFs) was constructed for the detection of Aβ. It has the ability to specifically quantify Aβ, the precursor that had not yet been aggregated into AβO. The employed AuNPs/Fe-MOFs nano-composite in this sensor not only provided the opportunity to anchor the aptamer, but also enhanced the response to promote its sensitivity. The relative inhibition ratio of luminol ECL on this sensor was linearly related to the logarithm of Aβ concentration in the range from 0.5 to 50 pM, with a LOD at 104 fM. The aptasensor has high specificity to Aβ over its analogs and recoveries in human serum were obtained within 96.0–103.7%. The research prospectively provides a new demonstration for early diagnosis of the disease in clinic.
研究领域:
生物医学工程
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分析化学
·
神经科学
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Ying Huang,Tiantian Liu,Ying Xiong,Qian Wen,Wang Li,Jiali Ren,Haiyan Zhong
The rapid discrimination and detection of pesticide residues represent a critical strategy for mitigating food safety risks associated with pesticide contamination. We designed and synthesized three distinct iron-based metal-organic frameworks (Fe-MOFs) nanozymes incorporating varied organic ligands. Owing to the differential modulation of their peroxidase-like activity by different pesticides, a facile yet efficient three-channel sensing array was constructed using these Fe-MOF nanozymes, allowing for the simultaneous discrimination of five pesticides (the minimum distinguishable concentration was 1 μg/mL). By converting pesticide-specific response signals into fingerprint profiles and subjecting them to analysis, including linear discriminant analysis and hierarchical cluster analysis, we achieved the classification of diverse pesticide species. Notably, the sensing platform exhibited good discriminative capability even for complex pesticide mixtures and real samples (corn and oat). This approach established a reliable and efficient strategy for pesticide screening, offering significant potential for enhancing food safety monitoring and safeguarding public health.
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DOI
PubMed
高影响因子
VACUUM
·
2019
·
IF 2.515
Kun Wang,Xiaobing Huang,Tao Zhou,Haiyan Wang,Huasheng Xie,Yurong Ren
Li 2 FeSiO 4 /C cathode composites were fabricated from a simple solid-state approach using precursor Fe-MOFs prepared by hydrothermal process. The Li 2 FeSiO 4 /C composites covered by carbon film with diverse contents were characterized using XRD , SEM , galvanostatic charge-discharge measurement and EIS, and so on. Results of the investigation prove that Li 2 FeSiO 4 /C composites with 19.3 wt % carbon layer present prominent electrochemical capability, which delivered the discharge capacity of 154, 138, 129, 117 and 100 mA h g −1 at 0.2, 0.5, 1, 2 and 5 C, respectively. After 100 cycles, discharge capacity retained 97.4% compared to the original value at 2 C. Furthermore, it possesses the lowest charge transfer resistance as well as the highest Li + diffusion coefficient , attributing to uniform carbon coating and porous structure for Li 2 FeSiO 4 /C composites.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
·
IF 5.589
Yongjie Wan,Jinquan Wan,Yongwen Ma,Yan Wang,Ting Luo
In this study, four typical modulators (NH 4 OH(A), CH 3 COOH(B), CH 3 COONa(C) and CH 3 COONH 4 (D)) were applied to modulate the microwave-assisted synthesis of Fe-MOFs. The effects of various modulators on the yield, electrochemistry activity and PS activation capacity of prepared catalysts were systematically investigated. The ideal modulator was revealed as the 7.5 mM CH 3 COONH 4 . Contributed by the defects caused by the dual effects of CH 3 COONH 4 , Fe-MOFs-D-7.5/PS system showed excellent orange G (OG) degradation with high reaction stoichiometric efficiency (RSE) and desirable recycling performance. The main radicals should be SO 4 ·− and O 2 ·− which were confirmed by EPR and chemical quenchers. Furthermore, the frontier molecular orbital (FMO) theory and dual descriptor (DD) method were employed in predicting radical attacking sites of OG. According to the results of theoretical computations and experimental detection, degradation pathways of OG in Fe-MOFs-D-7.5/PS system were proposed. Similar to the function of the battery, this study gives new insight into the possible mediatory roles of Fe-MOFs-D-7.5 in PS activation by transferring the electrons between PS and the unsaturated metal sites (CUS). The Fe-MOFs-D-7.5/PS system is a promising process for environmental remediation.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.4
Wang Xiaoqi,Yang Pengwei,Yu Linzhu,Jiang Haoxuan,Ma Jingxiang,Ma Xiangshuai,Ma Shuangchen
Electrochemical nitrogen reduction reaction (eN2RR) is a highly promising approach for ammonia synthesis under normal temperature and pressure conditions. However, its practical application is limited by the low activity and selectivity of the catalysts. In this study, a series of Fe-MOFs materials were prepared by hydrothermal method, and further sintered to obtain Fe@C materials. The electrocatalytic performance of these materials in eN2RR was systematically investigated. The results showed that MIL-53(Fe)-2 exhibited excellent catalytic activity at -0.4 V vs. RHE, with an ammonia production rate of 1.443 µg·h⁻¹·mg⁻¹ and a Faradaic efficiency of 5.972%. In contrast, the Fe@C material derived from MIL-53(Fe)-1, although having rapid activation characteristics within a narrow potential window, did not perform as well as the former. This work provides a new material strategy and experimental basis for the design of iron-based eN2RR catalysts.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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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 ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Yaqin Chen,Jiafeng Wu,Weisen Yang,Yuanyuan Fu,Rihui Zhou,Shouhui Chen,Lixue Zhang,Yonghai Song,Li Wang
Transition metal oxides@carbon(C) nanocomposites with hierarchical three-dimensional (3D) core-shell nanoarchitectures, large surface area and high electrical conductivity as anode materials for lithium ion batteries (LIBs) are very desirable. Herein, we developed a simple and feasible route to fabricate novel hierarchical 3D ball-in-ball ZnO/ZnFe 2 O 4 @C nanospheres with well-defined hollow microstructures via one-step carbonization of Zn/Fe-metal organic frameworks for the first time. The as-prepared hierarchical 3D ball-in-ball ZnO/ZnFe 2 O 4 @C nanospheres were carefully characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction, thermogravimetric analysis , N 2 adsorption/desorption isotherm, transmission electron microscopy and electrochemical techniques . The results showed ultrafine ZnO and ZnFe 2 O 4 nanocrystals were uniformly encapsulated by few carbon layers which was derived from in-situ carbonization of the organic ligands. Benefiting from their special hollow nanoarchitectures, ultrafine ZnO and ZnFe 2 O 4 nanocrystals encapsulated by a few carbon layers, large specific surface area and high electrical conductivity, the hierarchical 3D ball-in-ball ZnO/ZnFe 2 O 4 @C nanospheres presented high reversible capacities of 1283 and 1100 mA h g −1 after first 100 cycles and the following 100 cycles at current density of 100 and 200 mA g −1 , respectively. A high specific capacity of 155 mA h g −1 was obtained at relatively large current rates of 20 A g −1 .
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 4
·248
·
IF 3.504
Fuhua Wei,Ding Chen,Zhao Liang,Shuaiqi Zhao
Using a microwave-assisted ball-milling approach, Fe-based metal-organic frameworks (Fe-MOFs) were prepared from FeSO4·7H2O and trimesic acid. Scanning electron microscopy, Fourier-transform infrared spectrometry, X-ray, and thermogravimetric analysis were utilized to characterize the thermal stability and structure of the prepared Fe-MOFs. These Fe-MOFs were used to remove organic dyes from aqueous solutions. Specifically, they removed 96.97% of 23.3592 mg/L of Congo red in a 200 mL solution within 300 min of treatment with natural light at 15 °C. Likewise, 88.21 and 70.90% of 22.7527 mg/L of Orange II and 17.8326 mg/L of Rhodamine B, respectively, were removed from 200 mL solutions within 300 min of treatment at 15 °C. At 35 °C, 99.57, 95.98, and 99.38% of 23.3855 mg/L of Congo Red, 22.7365 mg/L of Orange II, and 17.9973 mg/L of Rhodamine B, respectively, were removed from 200 mL solutions within 300 min of treatment. The adsorption kinetics were investigated and the pseudo-first-order kinetic model was found to be superior to the pseudo-second-order kinetic model. Overall, using metal-organic frameworks to treat dye wastewater was found to be inexpensive, feasible, and efficient. Therefore, this material has future prospects in research and applications in the purification of wastewater.Keywords:wastewater treatment;metal-organic frameworks;dye removal;microwave-assisted ball milling
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Yongjie Wan,Jinquan Wan,Joe R. Zhao,Yan Wang,Ting Luo,Shou Yang,Yaxin Liu
A novel catalyst (Fe-MOFs-MW) was facilely synthesized under microwave-assisted with NaOH as modulator for activating peroxydisulfate (PDS). The accelerated nucleation process was confirmed by Johnson-Mehl-Avrami (JMA) model. There were abundant reactive sites on prepared Fe-MOFs-MW while maintaining high Space-Time-Yield value up to 2300 kg/m 3 ·d. Degradation performance of Fe-MOFs-MW as PDS catalyst on sulfamethoxazole (SMX) removal was evaluated. Results indicated that Fe-MOFs-MW with more Fe element anchored (10%) exhibited excellent catalytic capacity for PDS. Besides, the fantastic stability and reusability were confirmed through recycle experiment. After recycled for 4 times, the removal efficiency of SMX and TOC was 88% and 31.3% compared to 98% and 38% without recycling, respectively. An accurate prediction model on the degradation effect with water matrices coexisted was established by response surface methodology (RSM) method. Moreover, SO 4 ·- , O 2 ·- and ·OH were confirmed as the main reactive species through chemical quenching and EPR tests. The mechanism of Fe-MOFs-MW/PDS process mainly based on electron circulation theory was proposed. As the robust PDS catalyst, facile prepared Fe-MOFs-MW was promising in the treatment of emerging pollutants.
研究领域:
环境科学
·
催化化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xiang Li,Erbiao Cui,Zhen Xiang,Lunzhou Yu,Juan Xiong,Fei Pan,Wei Lu
Electromagnetic (EM) wave absorbing materials have been extensively applied in the electronic devices and wireless communication to solve the increasingly serious problems of electromagnetic pollution and radiation. In this work, Fe-MOFs/biomass cotton derived Fe@nanoporous carbon@carbon fiber (Fe@NPC@CF) composites were successfully obtained by means of in-situ synthesis and thermal decomposition processes. It was found that the Fe@NPC composites were uniformly distributed on the carbon fibers matrix. As a result, EM wave absorbing performances were greatly promoted via the synergic effects among Fe nanoparticles , nanoporous carbon and carbon fibers. A strong reflection loss ( RL ) of −46.2 dB and a wide absorbing bandwidth of 5.2 GHz ( RL < -10 dB) with a matching thickness of 2.5 mm were achieved for the Fe@NPC@CF composites with a low filling ratio of 25%. Therefore, this work not only paved the way for development of biomass as a green, low-cost and renewable high-performance carbon-based absorber, but also provided a good design and fabricating concept for the composite materials of EM wave absorber.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 14
·e202200161
·
IF 4.839
Bo Ling,Yaguang Wang,Ruo Mi,Di Wang,Hongqi Chen,Xiaohu Li,Ye Zhang,Lun Wang
Graphical NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles coated with Fe−TCPP metal-organic frameworks nanocomposite was designed and constructed for multimodal imaging and synergetic chemodynamic therapy/photodynamic therapy of tumors. Here, NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles (UCNPs) coated with Fe−Tetrakis (4-carboxyphenyl) porphine (TCPP) metal-organic frameworks (Fe-MOFs) nanocomposite (UCNPs@MOFs) was designed and constructed for multimodal imaging and synergetic chemodynamic therapy (CDT)/photodynamic therapy (PDT) of tumors. The UCNPs@MOFs were successfully applied for tumor cells imaging in vitro and in vivo in near-infrared (NIR) region. The doped Gd was used as contrast agent for the magnetic resonance imaging (MRI) of mouse tumors. The luminescence in the UV-vis region was absorbed by the Fe-MOFs to produce singlet oxygen ( 1 O 2 ) for PDT. The Fe 3+ doped in the MOFs can catalyze H 2 O 2 to produce oxygen and hydroxyl radical (⋅OH). Hydroxyl radical is used in CDT and cooperates with the 1 O 2 of PDT. Based on the CDT/PDT synergistic effects, the UCNPs@MOFs nanocomposite had obviously enhanced tumor inhibitory efficiency in vivo. These results described that the asprared UCNPs@MOFs nanocomposite have great potential in the effective multimodal imaging and treatment of tumors.
研究领域:
生物医学工程
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纳米医学
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肿瘤学
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DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 8
·618
·
IF 4.3
Ting Liu,Yun Wu,Hao Wang,Jichang Lu,Yongming Luo
The urgent need for sustainable CO2conversion technologies has driven the development of advanced photocatalysts that harness solar energy. This study employs a CTAB-assisted solvothermal method to fabricate a Z-scheme heterojunction Fe-MOFs/VO-Bi2WO6(FM/VO-BWO) for photocatalytic CO2reduction. Positron annihilation lifetime spectroscopy (PALS) was employed to confirm the existence of oxygen vacancies, while spherical aberration-corrected transmission electron microscope (STEM) characterization verified the successful construction of heterointerfaces. X-ray absorption fine structure (XAFS) spectra confirmed that the defect configuration and heterostructure changed the surface chemical valence state. The optimized 1.0FM/VO-BWO composite demonstrated exceptional photocatalytic performance, achieving CO and CH4yields of 60.48 and 4.3 μmol/g, respectively, under visible-light 11.8- and 1.5-fold enhancements over pristine Bi2WO6. The enhanced performance is attributed to oxygen vacancy-induced active sites facilitating CO₂ adsorption/activation. In situ molecular spectroscopy confirmed the formation of critical CO2-derived intermediates (COOH* and CHO*) through surface interactions involving four-coordinated and two-coordinated hydrogen-bonded water molecules. Furthermore, the accelerated interfacial charge transfer efficiency mediated by the Z-scheme heterojunction has been conclusively demonstrated. This work establishes a paradigm for defect-mediated heterojunction design, offering a sustainable route for solar fuel production.
研究领域:
材料科学
·
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）