DIAMOND AND RELATED MATERIALS
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2025
·
IF 5.1
Zeng Liu,Yuanyuan Zeng,Lan Long,Yang Li,Wei Zhou
Metal organic framework (MOF), with light weight, high specific surface area, and tenability had significant electromagnetic wave (EMW) absorption potential. Ultrathin and efficient UiO-66 MOF/CNT composites are successfully prepared using a simple solvothermal method. The high porosity and large specific surface area of the MOF provide multiple pathways for charge transport, significantly enhancing the probability of EMW reflection and scattering. Under the synergistic effect of CNTs, the conductivity loss and polarization relaxation loss of the composites increased, leading to improved impedance matching. With the combined influence of various attenuation mechanisms, the composites exhibit outstanding EMW absorption performance, with a minimum reflection loss of −54.74 dB and an effective absorption bandwidth of 2.94 GHz at a thickness of 2.04 mm. Additionally, the radar cross section of the MOF/CNT composites was reduced by a maximum of 14.8 dB compared to that of a metal plate, demonstrating excellent practical application potential. Therefore, lightweight, ultrathin, and broadband high-efficiency absorption MOF/CNT composites held significant promise for widespread EMW absorption applications.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
Applied Materials Today
·
2021
·
IF 10.041
Minghao Ni,Ming Gong,Xiang Li,Jinlou Gu,Bo Li,Ye Chen
Metal-organic frameworks (MOFs) have attracted significant attention thanks to their excellent physical and chemical properties. Metal-organic frames are widely used in optics. For example, metal-organic frameworks can be used in fluorescent probes to detect and treat diseases, and can also be used to make solid-state light-emitting devices. Considering the high stability and easy synthesis of Zr-based UiO-66 MOF as well as the strong fluorescent emission of porphyrin molecules, the TCPP-incorporated UiO frameworks would inherit these advantages and exhibit intriguing optical performance. Therefore, in this paper, TCPP was doped into UiO-66, and the optical properties of the resulting MOF structure were observed. To obtain the optimal doping condition, three doping concentrations of TCPP were used. Besides the structural and morphological characterization by X-ray diffraction and scanning electron microscopy, more attentions have paid on the optical testing based on absorption and fluorescence spectroscopy, two-photon fluorescence spectroscopy and time-resolved spectroscopy. As a result, the TCPP-doped MOFs exhibited good fluorescence properties and satisfied our previous expectations of nonlinear optical properties and two-photon absorption. This work would pave a new way in constructing various MOFs-based solid-state devices with widespread optical applications.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Feng Ding,Xiong Shuai,Yanyan Chen,Donglan Zhang,Fangwei Qi,Cijun Shuai
Following peripheral nerve injury, a large number of macrophages will be recruited to the nerve defect site to regulate the immune microenvironment and then initiate a series of inflammatory reactions, which is not conducive to nerve repair. Electrical stimulation can not only affect the polarity of macrophages by regulating the immune microenvironment but also promote nerve regeneration by modulating voltage-gated ion channels. However, traditional electrical stimulation relies on power sources, wires, and implanted electrodes, which may pose risks of infection and secondary surgery. Here piezoelectric materials Ti3C2Tx/UiO-66 are synthesized by a hydrothermal method and then blended into PLLA to prepare a self-power nerve scaffold using laser additive manufacturing technology. Under ultrasound stimulation, UiO-66 nanoparticles can generate localized piezoelectric potential, while Ti3C2Tx nanosheets accelerate the charge transfer. The results indicate that a nerve scaffold promotes the current generation, with a current of up to 0.036 μA. The results indicate that electrical stimulation can promote the transformation of macrophages into the M2 antiinflammatory phenotype by inhibiting the Ca2+-CaMKII-NF-κB signaling pathway. Furthermore, the scaffold can upregulate the expression of bone marrow mesenchymal stem cell neural markers Tuj and Map under ultrasound treatment. This work provides insights into wireless electrical stimulation regulating the immune microenvironment to promote nerve repair.
研究领域:
生物医学工程
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材料科学
·
神经科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Haipeng Zhu,Renhao Li,Guozhen Liu,Yang Pan,Jiahui Li,Zhenggang Wang,Yanan Guo,Gongping Liu,Wanqin Jin
Pervaporation shows great potential in separation of organic-organic mixtures that are widely involved in chemical and petrochemical industries, while the separation performance of polymeric membranes is undesirable for practical application. In this work, we incorporated UiO-66 (ZrCl 4 ) metal-organic frameworks (MOFs) into chitosan (CS) membrane to separate methanol-dimethyl carbonate (DMC) mixtures. ZrOCl 2 ·8H 2 O or ZrCl 4 was selected as metal precursor to synthesize UiO-66, which aimed to investigate the structural defect of UiO-66 for the separation performance of mixed matrix membranes (MMMs). BET, 1 H NMR and low-angle XRD characterizations indicated that UiO-66 (ZrCl 4 ) with appropriate pore size is more suitable for preferentially permeate methanol over DMC. IR, dielectric relaxation and DSC characterizations combined with molecular simulations revealed the ideal interfacial morphology of UiO-66/CS MMMs was owing to the favorable molecular interactions including hydrogen bond interaction and van der Waals interaction. Pervaporation separation of methanol-DMC mixtures demonstrated that UiO-66 (ZrCl 4 ) nanofillers can simultaneously enhance the permeation flux and separation factor of CS membrane. The optimized 10 wt% UiO-66 (ZrCl 4 )/CS MMM exhibited total flux and methanol/DMC separation factor of 355 g/m 2 h and 337 for 10 wt% methanol-DMC mixtures at 50 °C, which were 3.4-fold and 25-fold higher than that of the pure CS membrane, respectively, and outperformed the state-of-the-arts polymer-based membranes.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Chengyue Yang,Yuanbo Sun,Bin Zhao,Ji Han,Benzheng Li,Peilin Xue,Lei Xie,Jianshe Hu,Jingyi Wang
Rapid and targeted intervention during sudden mercury pollution incidents can significantly mitigate the harmful effects of mercury dissemination. Mesoporous metal–organic frameworks (MOFs) are demonstrated great promise for mercury wastewater purification, owing to their exceptional adsorption capacity. However, these materials often underperform at exceptionally high or low Hg(II) concentrations, limiting their use in emergencies. To address this issue, this study leverages nanostructure engineering techniques and, for the first time, fine-tunes the proportion of surfactants to construct a thiol-functionalized UiO-66 MOF (Nic-UiO-66-SH) with size-adjustable nano-ion channels for rapid Hg(II) pollution management in emergency contexts. The Nic-UiO-66-SH, with a maximum adsorption capacity of 1695.87 mg g −1 , can quickly and effectively adsorb Hg(II) at extreme concentrations (10–600 mg L −1 ) within 2.5–105 min, bringing the concentration down to drinking water standards (<0.002 mg L −1 ). This superior performance is attributed to the concentration-specific adsorption mechanism of ions in adaptive nano-ion channels based on Debye radius theory, which guides the precise control of channel size. Molecular simulations further validate the significant role of ion channels in optimizing Hg(II) diffusion and adsorption. This work establishes a theoretical foundation for the development of emergency wastewater purification materials and promotes their practical application in pollution response scenarios.
研究领域:
环境科学
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材料科学
·
化学工程
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Yong Li,Dongping Fang,Chao Yang,Xike Tian,Yulun Nie,Jianbo Shi
The detection of per- and polyfluoroalkyl substances (PFASs) in the environment is critical due to their adverse health effects, but it remains challenging because of the high cost and technical complexity of standard analytical methods. We developed a series of rare earth-based bimetallic metal–organic frameworks (MOFs) for the sensitive and efficient fluorescence detection of perfluorooctanoic acid (PFOA). By systematically modulating the ligand functional groups with amino (−NH2), hydroxyl (−OH), and fluorine (–F) moieties, the influence of ligand electronegativity on the PFOA recognition performance was evaluated. The experimental results demonstrated that the local electrostatic potential of the MOFs, governed by the functional groups, is a critical factor in determining the PFOA binding affinity and fluorescence sensitivity. Eu/UiO-66-NH2 demonstrated the highest sensitivity and selectivity for rapid fluorescence detection of PFOA, which was due to its strong positive electrostatic potential to facilitate binding via electrostatic attraction and synergistic hydrogen bonding. PFOA concentrations in actual water samples can also be determined by Eu/UiO-66-NH2. These findings provide theoretical insights and experimental support for the functional design of MOF-based sensors, paving the way for the sensitive and selective detection of PFASs.
✓ 已验证
DOI
PubMed
高影响因子
Food Frontiers
·
2026
·Vol. 7
·期 4
·e70334
·
IF 6.3
Zongda Li,Yukun Zhang,Youning Zhang,Yu Zhang,Jiangxia Xu,Fanxing Meng,Minwei Zhang
Combining high-electroactive nanomaterial with enzyme immobilization, the development of the electrochemical biosensor is a frontier approach to improve the sensitivity and selectivity for the detection of organophosphorus pesticides (OPs). In this study, a core–shell nanostructure (Ag-HMPB@UiO-66) was prepared with the Ag-HMPB as a core and a UiO-66 forming the shell as an advanced platform for acetylcholinesterase (AChE) immobilization. The innovation lies in the synergistic integration of the excellent electron transfer capability of Ag-HMPB with the good structural stability of UiO-66. Based on Lewis acid–base theory, the form of Zr─O─P coordination bond could improve the efficiency of aptamer (Apt) immobilization (131.65 nM mg −1 ) compared with physical adsorption. Electrochemical analysis revealed that the as-prepared biosensor exhibited exceptional substrate affinity, with a low K m of 0.234 mM. Under optimized conditions, the biosensor exhibited sensitive detection of trichlorfon over a wide range (1 × 10 −13 to 2.5 × 10 −9 g L −1 ), with a low LOD of 0.44 pg L −1 (3σ/slope). Additionally, the biosensor can also be applied to the cucumber with good recovery (97.34% to 103.35%), as well as good storage stability and reproducibility. This provides a reliable and powerful tool for the trace detection of OPs in complex agricultural products.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）