Nanomaterials
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2021
·Vol. 11
·期 7
·1847
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IF 5.076
Yan Ma,Yujie Miao,Guomei Mu,Dunmin Lin,Chenggang Xu,Wen Zeng,Fengyu Xie
Great expectations have been held for the electrochemical splitting of water for producing hydrogen as a significant carbon-neutral technology aimed at solving the global energy crisis and greenhouse gas issues. However, the oxygen evolution reaction (OER) process must be energetically catalyzed over a long period at high output, leading to challenges for efficient and stable processing of electrodes for practical purposes. Here, we first prepared Fe-MOF nanosheet arrays on nickel foam via rare-earth erbium doping (Er0.4Fe-MOF/NF) and applied them as OER electrocatalysts. The Er0.4Fe-MOF/NF exhibited wonderful OER performance and could yield a 100 mA cm−2current density at an overpotential of 248 mV with outstanding long-term electrochemical durability for at least 100 h. At large current densities of 500 and 1000 mA cm−2, overpotentials of only 297 mV and 326 mV were achieved, respectively, revealing its potential in industrial applications. The enhancement was attributed to the synergistic effects of the Fe and Er sites, with Er playing a supporting role in the engineering of the electronic states of the Fe sites to endow them with enhanced OER activity. Such a strategy of engineering the OER activity of Fe-MOF via rare-earth ion doping paves a new avenue to design other MOF catalysts for industrial OER applications.Keywords:rare-earth doping;MOFs;large current;electronic structure
研究领域:
材料科学
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电化学
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Materials Today Chemistry
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2026
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IF 7.4
Lican Chen,Can Dong,Tiancheng Yuan,Minzhen Bao,Xianmiao Liu,Zhikun Wang,Yanjun Li,Yu Wang
In situ decorating moso bamboo with Fe 3 O 4 nanoparticles. • The reflection loss of the prepared magnetic wood can reach −45.17 dB. • Established a radar attenuation model. The exponential proliferation of fifth-generation (5G) telecommunication networks has exacerbated electromagnetic (EM) pollution, transforming it into a formidable global challenge. Consequently, there is an imperative demand for the engineering of EM wave attenuating media that simultaneously feature low density, ecological sustainability, and exceptional absorbing proficiency. Herein, a renewable, self-supporting porous carbon composite (CB/Fe) was successfully fabricated via in-situ growth of Fe-based metal-organic frameworks (Fe-MOFs) on bamboo scaffolds followed by controlled carbonization. The unique hierarchical porous structure of bamboo, combined with uniformly distributed Fe-derived magnetic nanoparticles, enables the formation of a synergistic dielectric-magnetic loss network. Microstructural characterizations confirm that Fe nanoparticles and Fe 3 C phases are homogeneously embedded within a conductive carbon matrix, while increasing carbonization temperature significantly enhances graphitization degree and electrical conductivity. Characterized by a synergistic optimization of impedance matching and dissipation capacity, the CB/Fe-900 matrix demonstrates an extraordinary electromagnetic wave harvesting capability. Specifically, a minimum reflection loss (RL min ) of −69.37 dB is manifested at 14.64 GHz utilizing an ultra-thin thickness of merely 1.4 mm. Concurrently, this composite yields an expansive effective absorption bandwidth (EAB) spanning 4.62 GHz, highlighting its competitive edge in practical microwave shielding applications. The enhanced performance is attributed to multiple scattering within the 3D porous architecture, strong interfacial polarization at Fe-C heterojunctions, conductive loss, and magnetic resonance effects. Furthermore, the composite demonstrates excellent electrothermal conversion capability and thermal stability, highlighting its multifunctional potential.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Dongju Liu,Kunlan Diao,Daohai Zhang,Yupeng Hu,Zhi Lei,Teng Zhou,Kaixiang Zou,Shuhao Qin
With the popularity of wireless communication technology, the problem of electromagnetic radiation and interference is highlighted, and the development of efficient electromagnetic shielding materials has become a research priority. In this study, firstly, polyvinyl alcohol/sodium alginate (PVA/SA) hydrogels were prepared by physical cross-linking method, and further, iron-based metal-organic frameworks (Fe-MOFs) were prepared by solvothermal synthesis method, and with reduced graphene oxide (RGO) as a conductive filler, and γ-aminopropyltriethoxysilane (KH550) as a cross-linking agent, were prepared by chemical cross-linking method. Modified polyvinyl alcohol/sodium alginate/iron based metal organic framework/reduced graphene oxide (PVA/SA/Fe-MOF/RGO-KH550) composite hydrogel. The results show that the composite hydrogel has a compressive stress of 20.13 MPa, a compressive strain of 83.28 %, and an electromagnetic shielding efficiency of 39.98 dB at a thickness of 3 mm, which reaches the mid-range and high-end level, and it can be applied to industrial control, small and medium-sized data centres, automotive electronics, and general medical devices with medium-high requirements. The excellent performance of the hydrogel comes from the conductive properties and interfacial polarisation effect of RGO, the dielectric loss of Fe-MOF, which work in synergy, and KH550 optimises the interfacial bonding between the filler and the substrate to form a denser crosslinked structure, which strengthens the mechanical properties and electromagnetic shielding effect. The hydrogel preparation process is simple and low-cost, which provides a reference for the design of high-performance electromagnetic shieldingmaterials and an effective solution to the problem of electromagnetic interference.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Ning Li,Tiantian Wu,Yuzheng Cai,Tiange Li,Lianjun Song,Xianqing Huang,Jiansheng Zhao,Erkigul Bukyei,Tianlin Wang
Lead ion (Pb 2+ ) pollution seriously threatens the quality of aquatic products. In this study, a ratiometric fluorescence sensor consisting of tangerine fluorescent Mn:ZnS QDs (T-QDs) and blue fluorescent Fe-MOF (B-MOF) was developed for selective recognition of Pb 2+ . Upon exposure to Pb 2+ , the fluorescence of T-QDs was quenched while the fluorescence of B-QDs was slightly changed, causing the changes of fluorescence colors from tangerine to blue with a detection limit (LOD) of 3.79 nmol/L. The sensor also had the strengths of low cost, easy to operate, excellent sensitivity and selectivity. Significantly, a portable detection platform integrated with the sensor was constructed to achieve on-site visual detection. As expected, the detection platform was successfully applied for testing Pb 2+ with the LOD of 7.78 nmol/L. The strategy may not only provide a great capacity for on-site monitoring of Pb 2+ in aquatic products but also expand application in environmental pollution detection.
研究领域:
环境科学
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分析化学
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材料科学
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食品安全
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Shu-Yu Wang,Yin-Hong Niu,Fang-Di Hu
A ratiometric colorimetric sensing platform was developed for nitrite detection, featuring a trimetallic metal-framework (MOF) nanozyme (Mn/Ni/Fe-MOF) synthesized via a facile one-pot solvothermal method. Comprehensive characterization revealed its successful fabrication and superior structural properties. The rational design of the trimetallic system creates a synergistic electron transfer network, endowing it with significantly enhanced peroxidase-like activity that surpasses its mono- (Fe-MOF) and bimetallic counterparts (Mn/Fe -MOF and Ni/Fe -MOF). This advancement leads to a low detection limit of 1.39 μM and a wide linear range of 2.0–150 μM for nitrite sensing, improving the sensitivity of nanozyme-based colorimetric method. Leveraging this high activity, Mn/Ni/Fe-MOF catalyzed H 2 O 2 -mediated oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue product (oxTMB). Subsequently, a robust ratiometric platform (A 450 /A 652 ) was constructed based on a specific diazotization reaction between nitrite and oxTMB, which induced a distinct color change and an absorbance shift. Unlike single-signal assays prone to fluctuations, this internal reference mechanism automatically corrects for common interferences, ensuring high accuracy and reliability in complex matrices, as evidenced by excellent recoveries (97.9%–102.3%) in real samples (tap water and sausage). The entire system is characterized by remarkable simplicity: the nanozyme is synthesized via a facile one-pot method, and the detection requires only a single-step addition of nitrite to the pre-formed oxTMB system under mild acidic condition. This streamlined, “mix-and-detect” protocol avoids complex modifications, multi-step reactions, or sophisticated instruments, offering practical advantages for potential on-site application. This work presents a reliable, high-performance sensing strategy and highlights the great potential of multi-metal MOF nanozymes in designing advanced sensors.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Yifan Zhu,Renjie Wang,Mengyao Ma,Hanyu Ji,Jinnan Gan,Xudong Song,Huijuan Ran,Qianqian Chen,Qiaohan Cheng,Hongyu Zhu,Qingsong Zhu
Uric acid (UA) concentrations serve as pivotal health indicators. This study developed a novel carbon paper (CP) and Fe-MOF composite and utilized it as an efficient electrochemical sensor for the detection of UA. SEM, XRD and FT-IR confirms the successful in-situ growth of Fe-MOF on the carbon paper substrate. The sensor exhibits a linear response to UA concentrations ranging from 3 to 400 μM, with a high correlation coefficient (R 2 = 0.998) and a LOD of 2.798 μM. The sensor demonstrates excellent reproducibility, with an RSD of less than 5%, and notable long-term stability, retaining 96.4% of its initial current response after one month. Furthermore, it exhibits selectivity in UA detection even in the presence of interfering species such as ascorbic acid and dopamine. The feasibility of using the CP/Fe-MOF sensor to detect UA in a typical biological fluid, bovine serum, was also evaluated by the standard addition method. The enhanced sensing performance can be attributed to the preservation of the carbon paper's superior electron transport properties within the composite material, combined with the increased specific active sites by the Fe-MOF components, which significantly boost the electrochemical sensing capabilities.
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Nature Communications
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2026
·
IF 18.1
Lv Guoliang,Zhang Linjuan,Luo Yuanyuan,Zhu Jianqiu,Wu Jilong,Qin Li,Zhang Yanlin,Zhang Zheng,Tan Pengwei,Duan Guotao
Simultaneously achieving chemiresistive gas sensors with high selectivity, sensitivity, and stability remains a significant challenge. In this study, inspired by the H 2 S-specific catalytic enzymes in biological systems, we construct an amorphous unsaturated-ligand MIL-68(Fe) 3D MOF via in situ thermal induction. Without the introduction of extrinsic catalytic or conductive components, this MOF modification strategy creates unsaturated Fe atoms within the framework itself. These atoms function dually as catalytic and conductive sites, thereby overcoming the inherent low conductivity of conventional 3D MOFs and enabling the direct construction of chemiresistive sensor for room-temperature molecular olfactory sensing. The targeted water-adsorption-coordinated catalytic mechanism bypasses the limitations of traditional oxygen adsorption processes to achieve unprecedented comprehensive performance, including fingerprint-level selectivity (against 29 interfering gases), superior sensitivity coefficient (~83/ppm), ultra-low measured lower limit (1 ppb), rapid gas sensing response/recovery characteristics (~30 s/73 s), and excellent long-term stability at room temperature.
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JOURNAL OF NANOBIOTECHNOLOGY
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2025
·Vol. 23
·期 1
·1-21
·
IF 12.6
Zhao Jinchao,Lei Lei,Zeng Cheng,Zhou Xianfei,Ding Junkang,Dai Wenbin,Jiang Angfeng,Zou Shaomin,Jin Qiao,Tang Zhe
Incomplete radiofrequency ablation (iRFA) of hepatocellular carcinoma (HCC) has the risk to exacerbate the tumor immunosuppressive microenvironment and promote lung metastasis. There is an urgent need to reverse the immunosuppressive microenvironment and reduce lung metastasis after iRFA. Herein, an iron-based metal-organic framework loaded with capmatinib (Fe-MOF/Cap) is employed to reverse the immunosuppressive microenvironment dominated by M2-like tumor-associated macrophages (TAMs) after iRFA and inhibit lung metastasis of HCC. On one hand, Fe-MOF/Cap repolarizes M2-like TAMs to M1-like TAMs and inhibits the expression of PD-L1 after iRFA, promoting CD8+ T cell infiltration. The infiltration of CD8+ T cells and the decrease of PD-L1 are conducive to enhance the immunotherapy after iRFA. On the other hand, Fe-MOF/Cap can inhibit lung metastasis of HCC via inhibiting the expression of c-MET. In vitro and in vivo experiments confirm that Fe-MOF/Cap is able to significantly inhibit the lung metastasis of HCC after iRFA by inhibiting the c-MET/STAT3/VEGF pathway. Fe-MOF/Cap provides a potentially promising strategy for HCC immunotherapy and anti-metastasis after iRFA, with favorable clinical prospects.Graphical
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Wenjuan Wang,Yanfang Huang,Junpeng Zuo,Lulu Kou,Bingbing Liu,Hu Sun,Guihong Han
Microfine metal–organic frameworks (MOFs) are promising adsorbents for water treatment, but their commercial applicability is severely constrained by poor separability. Herein, we designed a feasible bubble flotation strategy for achieving the effective separation of oxyanions-loaded Fe-MOF particles in the solution after adsorption, by modifying the particle interface properties and introducing bubbles mineralization. The results showed that the separation of P(V), Mo(VI) and W(VI) oxyanions-loaded Fe-MOF could be completely achieved under optimum conditions. FTIR, XPS and DFT analyses revealed that the particle size and hydrophobicity of oxyanions-loaded Fe-MOF increased by sodium dodecyl sulfate (SDS) collector via chemisorption and electrostatic interactions. The collision and attachment models analysis of bubbles with particles demonstrated that the separation efficiencies of collector modified oxyanions-loaded Fe-MOFs were significantly enhanced with increasing bubble mineralization. EDLVO theoretical calculations and bubble-particle carrying ability analysis demonstrated that the gravitational interactions between oxyanions-loaded Fe-MOF particles and particles/bubbles were intensified by the collector. The gravitational interaction further induced particle aggregation and enhanced the carrying capacity of individual bubbles. This work provides a feasible strategy for the removal of oxyanions and the separation of oxyanions-loaded microfine Fe-MOF in the adsorption process.
研究领域:
环境科学
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材料科学
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化学工程
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Analytical Methods
·
2024
·
IF 2.7
Tongxiao Zhao,Baokang Jin
Carbohydrate antigen 19-9 (CA19-9) is an important marker for pancreatic cancer, ovarian cancer and other tumors, and its rapid and stable detection is the basis for early diagnosis and treatment. In this paper, a label-free electrochemical immunosensor for the sensitive detection of CA19-9 has been developed. First, the synthesis of two novel core–shell bimetallic nanomaterials, namely Ce-MOF-on-Fe-MOF and Fe-MOF-on-Ce-MOF, was accomplished using the MOF-on-MOF approach. The poor electrical conductivity of MOF materials was addressed by incorporating polyethylenimide (PEI) functionalized rGO with Ce-MOF-on-Fe-MOF and Fe-MOF-on-Ce-MOF nanomaterials. Simultaneously, toluidine blue (Tb) was employed as a redox probe and physically adsorbed onto the synthesized materials, resulting in the formation of two nanomaterials: rGO@Ce-MOF-on-Fe-MOF@Tb and rGO@Fe-MOF-on-Ce-MOF@Tb. The fundamental characterization reveals that the sensing performance of the rGO@Ce-MOF-on-Fe-MOF@TB-based immune sensor surpasses that of the rGO@Fe-MOF-on-Ce-MOF@TB-based immune sensor, which is attributed to the fact that, unlike the interlayer-constrained structure of Fe-MOF-on-Ce-MOF, in Ce-MOF-on-Fe-MOF, Ce-MOF penetrates into Fe-MOF to form a heterogeneous structure due to the relatively large pore size of Fe-MOF, which better combines the excellent biocompatibility and strong anchoring effect of Fe MOFs on antibodies, as well as the high electrochemical activity and conductivity of Ce-MOF, to enhance sensing performance. The proposed label-free immunosensor based on rGO@Ce-MOF-on-Fe-MOF@Tb has a wide linear range (1–100 000 mU mL−1), a low detection limit (0.34 mU mL−1), good stability, reproducibility, and repeatability, and satisfactory applicability, which provides a potential platform for clinical applications.
研究领域:
肿瘤学
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生物传感技术
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材料科学
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PubMed
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
·
IF 5.9
Ying-hong La,Wen-jia Ha,Yong-hu Ma,Zhi-qiang Wu,Hong-jian Zhao
In this work, an S-scheme heterojunction photocatalyst composed of Fe-MOF-NH 2 -modified BiOCl (denoted as BFN) was successfully prepared via a one-step hydrothermal technique for the efficient photocatalytic (PC) decomposition of tetracycline hydrochloride (TC-HCl). The morphology, crystal structure, composition, specific surface area, and photoelectric characteristics of BFN were systematically characterized using multiple techniques. XRD patterns confirm the successful fabrication of Fe-MOF-NH 2 /BiOCl (BFN) heterostructures. Introducing Fe-MOF-NH 2 shrinks BiOCl lattices via partial replacement of Bi 3+ with smaller Fe 3+ , which further exposes more active BiOCl (110) facets. SEM images display BiOCl nanosheets evenly grown on spindle hexagonal Fe-MOF-NH 2 to create compact heterointerfaces. This structure optimizes pore configuration and light capture. Owing to its elaborate heterojunction and regulated crystal texture, BET data confirm the optimal BFN possesses a high specific surface area of 116.2 m 2 ‧g −1 . UV–vis DRS further verifies a 420 nm red shift in its light absorption edge. XPS and EPR analyses reveal that the oxygen vacancy concentration in the heterojunction is significantly increased, 3 and 8 times higher compared to those of Fe-MOF-NH 2 and BiOCl, respectively. The compact S-scheme heterojunction constructs a directional charge-carrier transfer pathway. This structure strongly suppresses photocarrier recombination while preserving robust redox potentials. Higher photocurrent density and lower EIS impedance jointly confirm accelerated charge separation. PC experiments demonstrate that the 70% BFN sample achieves markedly higher degradation efficiency for TC-HCl under Light-emitting diode (LED) lamp irradiation compared with the individual components, and the degradation process involves multiple reactive species, including h + , ·O 2 − , and ·OH. LC-MS analysis revealed three possible degradation pathways, and hydroponic toxicity tests using mung bean as the model plant confirmed that the TC-HCl degradation products exhibit substantially reduced biotoxicity and even exert a certain growth-promoting effect. This study unveils the quadruple synergism of extended light absorption, S-scheme carrier migration, abundant oxygen vacancies and enhanced surface adsorption, offering experimental and theoretical support for bismuth/MOF photocatalysts in antibiotic wastewater remediation and agricultural ecological protection.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2022
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IF 4.52
Haishuai Peng,Yuanyuan Hui,Meixue Pu,Ding Yang,Aiqing Zhao,Weizhe Wang,Shan Wu,Bini Wang
Streptomycin (STR) residues in dairy products could cause serious health risks for human or affect the quality of the dairy products fermented by lactic acid bacteria , thereby resulting in economic losses. Thus, STR detection methods need to be developed quickly, simply, and sensitively. In this study, polyethyleneimine (PEI)-functionalized NH 2 -MIL-101(Fe) (PEI-Fe-MOF) was characterized and found to exhibit an enhanced electrochemical characteristics, when compared to Fe-MOFs. [email protected] core-shell NPs could further amplify its electrochemical signal. Based on the PEI-Fe-MOF/ [email protected] NPs nanocomposites, we have developed a novel electrochemical aptasensor to detect STR rapidly. When detected under optimal conditions, a wide linear range between 0.1 and 200 nM was observed for the aptasensor with a detection limit of 0.033 nM. Furthermore, the developed aptasensor has been satisfactorily applied for the rapid STR detection in dairy products with recoveries ranging from 98.2% to 110.1%. Therefore, our method can be considered a new effective method for the rapid detection of STR in dairy products.
研究领域:
食品科学
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分析化学
·
生物传感技术
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