Polymers
·
2024
·Vol. 16
·期 2
·275
·
IF 4.7
Shaojun Chen,Youhan Zeng,Weifeng Bi,Haitao Zhuo,Haiqiang Zhong
The flame-retardancy of polymeric materials has garnered great interest. Most of the flame retardants used in copolymers are functionalized additives, which can deteriorate the intrinsic properties of these materials. As a new type of flame retardant, functionalized metal–organic frameworks (MOFs) can be used in surface coatings of polymers. To reduce the flammability, a mixture of phytic acid, multi-wall carbon nanotubes, zirconium-based MOFs, and UiO-66 was coated on a PC/ABS substrate. The structure of the UiO-66-based flame retardant was established by FT-IR, XRD, XPS, and SEM. The flammable properties of coated PC/ABS materials were assessed by LOI, a vertical combustion test, TGA, CCT, and Raman spectroscopy. The presence of a UiO-66-based coating on the PC/ABS surface resulted in a good flame-retardant performance. Heat release and smoke generation were significantly reduced. Importantly, the structure and mechanical properties of PC/ABS were less impacted by the presence of the flame-retardant coating. Hence, this work presents a new strategy for the development of high-performance PC/ABC materials with both excellent flame-retardancy and good mechanical properties.
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PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Cheng Liu,Huiling Chen,Qi Chen,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of Al 3+ -doped UiO-66(Ce) MOFs (U(Ce x Al 1−x )) was developed to reveal the roles of metal doping on active site formation and substrate activation in photocatalytic selective transformation of amines to imines. Al 3+ doping induced crystal structure distortion to form coordinately unsaturated metal (Al, Ce) sites as Lewis acid sites to chemisorb and activate benzylamine (BA). In situ FTIR revealed that the Al site with stronger acid strength facilitated BA activation. The activation degree of N–H bonds in BA was evaluated by changes of calculated force constant. The intermediate products were confirmed through time-dependent in situ FTIR. The Al 3+ -doped sample U(Ce 0.90 Al 0.10 ), the optimal catalyst, showed a significantly increased BA conversion (97.6 %) than that (47.5 %) of undoped sample, which was attributed to enough active sites and the optimal charge mobility. Finally, the present study proposes a synergistic photocatalytic mechanism associated with molecular activation to demonstrate selective oxidation pathways at the molecular level.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Hong Chen,Wei Ou,Yu Huang,Hongchang Huang,Junlan Li,Juncheng Liu
As a protective layer for the flexible solar cell, a flexible protective material should be of high transmittance , excellent ultraviolet (UV) resistance and mechanical property. Herein, a foldable transparent polyimide (PI) composite film assembled with the zirconium-based metal-organic frameworks (UiO-66-X, X = H, NH 2 , NO 2 ) is prepared by the direct dispersion or in-situ growth methods. The results show that the transmittances of UiO-66-X@PI films (U@PI, NU@PI and OU@PI) prepared with the in-situ growth are higher than those of UiO-66-X/PI films prepared with the direct dispersion, and the former's mechanical properties are also better than those of the latter. This may be because that the UiO-66-X in the former are embedded into the PI matrix to construct multipoint bonding network. The U@PI exhibits stronger UV-resistance than the Pristine PI, NU@PI and OU@PI after 5000 equivalent sun hours (ESHs) UV irradiation. The attenuations of average transmittance and tensile strength for U@PI are 2.19 % and 18.68 %, respectively, which are only one half and one-third of those for the Pristine PI (4.59 % and 56.58 %), respectively. And the average transmittance of U@PI has been over that of the Pristine PI after 5000 ESHs UV irradiation. This may be because that the porous UiO-66 increases the UV transmission path and the electron-hole recombination center , thereby inhibits the destructive effect of UV.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shenghui Ning,Fuchao Yang,Guangyi Tian,Dongyin Li,Zhiguang Guo
As the pollution of oily wastewater becomes more and more serious, it has a great negative impact on the ecosystem and human health. How to achieve efficient oil-water separation has become a common ecological problem all over the world. Therefore, it is extremely significant to develop innovative and efficient oil-water separation membranes. Past studies have shown that the metal-organic framework material UiO-66 (Zr), which has free carboxyl groups, is not only hydrophilic but also has good stability. Inspired by this, an ingenious method for a polydopamine (PDA) and metal-organic skeleton UiO-66(Zr) coating anchoring on cotton fabric surface was proposed, and the final product was denoted as CF-PDA@CS@UiO-66-COOH fabrics. Particularly noteworthy is that the separation efficiency of CF-PDA@CS@UiO-66-COOH for various organics exceeded 99.83 %, the water flux was achieved to 100744.5 L/(m 2 ·h). After 20 cycles, the separation efficiency exceeded 99.81 % and the water flux always surpassed 75067.9 L/(m 2 ·h). In addition, the prepared membranes were able to maintain excellent underwater superoleophobic properties even under acidic or alkaline environmental conditions or after 50 sandpaper abrasion cycles. And it also has excellent self-cleaning and anti-fouling. These excellent properties are due to the strong anchoring between CF, PDA, CS and UiO-66-COOH. This facile and scalable functional fabric could be applied to a wide range of oil-water separation and facilitate the development of high flux separation devices.
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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.
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高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Tian Zhao,Pengcheng Xiao,Saiqun Nie,Jiangrong Yu,Shilin Peng,Jiayao Chen,Fuli Luo,Yi Chen
Aqueous zinc-ion batteries (AZIBs) face challenges such as Zn dendrite formation and poor cycle stability. Here, we report an ambient-temperature in situ growth strategy to fabricate a bacterial cellulose-metal organic framework composite separator (BC@UiO-66) for AZIBs. In this approach, UiO-66 (a Zr-based MOF) grows uniformly on BC nanofibers, forming a 95 μm-thick film with hierarchical porosity and abundant Lewis acid sites. The resulting BC@UiO-66 separator facilitates Zn2+ diffusion through interconnected nanochannels and promotes uniform Zn deposition, thereby suppressing dendrite growth. A Zn||Zn symmetric cell using BC@UiO-66 operates stably for over 2400 h at 1 mA cm−2 and a Zn||MnO2 full cell retains 162.98 mAh g−1 after 1000 cycles at 1 A g−1 with ∼100% coulombic efficiency. These results demonstrate the efficacy of MOF-cellulose composite separators in extending AZIB cycle life.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 45
·35376-35386
·
IF 4.4
Lai Delin,Wang Haoguang,Kong Gang,Che Chunshan,Miao Xinrui
A fluorine-free and environmentally friendly ultra-slippery superhydrophobic (USS) coating was successfully prepared through a simple one-step calcination process using UiO-66@polydimethylsiloxane (PDMS) as the precursor. During the calcination process, a composite structure consisting of UiO-66 derived ZrO 2 and oligomers derived from partial decomposition of PDMS endows the coating with excellent slippery superhydrophobicity. The coating exhibits notable anti-condensation performance, which can effectively inhibit water vapor condensation in humid environments and extend the freezing-thawing cycle time of water droplets under low-temperature conditions, while maintaining its stable superhydrophobic properties. Additionally, the USS coating possesses outstanding oil-water separation capability: The stainless-steel mesh modified by the USS coating achieves a separation flux of up to 40000 L h⁻ 1 m⁻ 2 for trichloromethane and retains a separation efficiency of over 90% as well as a WCA exceeding 150° even after 15 cycles. USS-coated cotton fabrics possess superior flame retardancy. By absorbing flame heat and generating a dense char layer, the coating inhibits combustion and cuts down black smoke emission, while keeping the fabric’s structural integrity and superhydrophobicity intact. This work provides a facile, low-energy, and environmentally friendly strategy for the preparation of multifunctional superhydrophobic coatings, overcoming the limitations of complex processes, high-energy consumption, and environmental harm in traditional superhydrophobic coating preparation.
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-8
·
IF 5.479
Guo Lan,Liu Yuan,Qu Fengli,Liu Zhe,Kong Rongmei,Chen Guang,Fan Wenjing,Xia Lian
A luminescent metal organic framework (LMOF) of type UiO-66-NH 2 was chosen for specific and sensitive detection of trace levels of hypochlorite. Hypochlorite causes the quenching of the blue fluorescence of nano-UiO-66-NH 2 (with excitation/emission maxima at 325/430 nm), and this finding forms the basis for a fluorometric assay for hypochlorite. The method overcomes disadvantages of conventional redox-probes which are interfered by oxidants with oxidation capability stronger than that of hypochlorite. Compared with other fluorescent probes for sensing hypochlorite, UiO-66-NH 2 has a comparable detection limit of 0.3 μmol L −1 and a broad linearity relationship in the range of 1–8 μmol L −1 . The probe was successfully applied to the detection of hypochlorite in complex water samples and living Hela cells.
Schematic representation of hypochlorite induced quenching of the blue fluorescence of nano-UiO-66-NH 2 (with excitation/emission maxima at 325/430 nm) through energy transfer. It overcomes disadvantages of conventional redox-probes which are interfered by oxidants with oxidation capability stronger than that of hypochlorite.
研究领域:
分析化学
·
材料科学
·
生物医学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 6
·1-11
·
IF 5.833
Ma Mingxuan,Zhang Jian,Li Peipei,Du Yingxiang,Gan Jie,Yang Jiangxia,Zhang Liu
Metal-organic framework (UiO-66-NH 2 )-incorporated organic polymer monolith was prepared by thermal polymerization. By virtue of the superior physical and chemical properties, the UiO-66-NH 2 -modified organic monolith was then functionalized by chiral selector cellulase via the condensation reaction between the primary amino groups and aldehyde groups. The synthesized materials were characterized by Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectrometry, thermogravimetric analysis, and nitrogen sorption isotherm. The cellulase@poly(glycidyl methacrylate-UiO-66-NH 2 -ethylene glycol dimethacrylate) (cellulase@poly(GMA-UiO-66-NH 2 -EDMA)) monolith was applied to enantiomerically separate the basic racemic forms of metoprolol, atenolol, esmolol, bisoprolol, and propranolol. In contrast to the cellulase@poly(GMA-co-EDMA) monolith without UiO-66-NH 2 , the cellulase@poly(GMA-UiO-66-NH 2 -EDMA) monolith reveals significantly improved enantiodiscrimination performance for metoprolol (Rs: 0 → 1.67), atenolol (Rs: 0 → 1.50), esmolol (Rs: 0 → 1.52), bisoprolol (Rs: 0 → 0.36), and propranolol (Rs: 0 → 0.44). The immobilization pH of cellulase, buffer pH, UiO-66-NH 2 concentration, and the proportion of organic modifier were evaluated in detail with enantiomerically separating chiral molecules. The intra-day, inter-day, column-to-column, and inter-batch precision have been discussed, the result was preferable, and the relative standard deviation (RSD) of separation parameters was <4.3%. Graphical abstract
Schematic representation of the preparation of a UiO-66-NH 2 -modified organic polymer monolith for enantioseparating five racemic β-blockers. UiO-66-NH 2 was synthesized and converted into a monolith as the stationary phase. Then, the modified monolith containing cellulase as the chiral selector was applied in a capillary electrochromatography system for enantioseparating chiral drugs.
研究领域:
分析化学
·
药物化学
·
生物技术
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PubMed
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2016
·
IF 0.633
Jing-Hua Yang,Xiao-Mao Zhou,Yu-Ping Zhang,Jun Chen,Hai-Weng Ma
In this paper, a novel polymerized fiber doped with metal–organic frameworks (UIO-66(Zr)-NH2) was developed in a capillary by microwave irradiation. The fiber was successfully prepared using 4-vinyl pyridine as the monomer and ethylene glycol dimethacrylate as the cross-linker to reinforce its durability. The resultant fiber was applied to extract sulfonylurea herbicides from environmental soil and water samples before analysis with high-performance liquid chromatography. The optimization of different parameters affecting solid-phase microextraction procedure was carried out. Under the optimum experimental conditions, the extraction capability of the hybrid fiber was two times greater than that of the polymer fiber without UIO-66(Zr)-NH2.The proposed hybrid fiber extraction method exhibited low detection limits (0.19–1.79 µg/l), good precision (<12.0%), and wide linear range (10–700 µg/l). Satisfactory recoveries of sulfonylurea herbicides were obtained with spiked soil and water samples in the range of 75.7–94.2 and 82.2–95.3%, respectively.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zuyao Fu,Hao Wang,Lingfeng Yang,Zhaoyang Ding,Jing Xie
Immobilized enzymes retain the high catalytic efficiency of natural enzymes while exhibiting improved stability under extreme conditions and reusability, which has led to their widespread application in sensing. This study presents the strategic immobilization of horseradish peroxidase (HRP) on magnetic UiO-66-NH 2 @PDA@Fe 3 O 4 frameworks, resulting in magnetic Metal-Organic Framework (MOF)-enzyme complexes (HRP@UiO-66-NH 2 @PDA@Fe 3 O 4 , named HUNPF). The immobilization of HRP led to the complexes exhibiting exclusively stable peroxidase activity. The Michaelis constant (Km) of immobilized HRP decreased to one-third of that of free HRP, indicating enhanced substrate affinity, while the ordered structure and large surface area of UiO-66-NH 2 @PDA@Fe 3 O 4 enhanced enzyme-substrate interactions. Furthermore, the creation of Zr-Fe active center synergistically enhances substrate catalysis alongside HRP, helping to counterbalance the activity loss caused by immobilization. Remarkably, the composite retained 90 % catalytic activity after 10 reuse cycles under magnetic recovery. A dual-mode colorimetric/fluorometric sensor was developed for nitrite detection using HUNPF, achieving detection limits of 0.20 μM and 0.13 μM for the colorimetric and fluorometric modes, respectively. This sensor offers low detection limits, excellent reliability, and high sensitivity, making it a valuable tool for environmental monitoring and food safety applications.
研究领域:
生物化学
·
材料科学
·
分析化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Feng Zhao,Weixia Yang,Yong Han,Xueli Luo,Wenzhi Tang,Tianli Yue,Zhonghong Li
The transformation of metal-organic frameworks (MOFs) to metal-organic gels (MOGs) is an attractive but challenging issue because they are generally regarded as the opposite, with the former being hard and the latter soft. Herein, a straightforward strategy was developed to synthesize amorphous Zr-MOG-12 by gelatinization of UiO-66-NH 2 (i.e. Zr-MOF) via a facile standing time-controlled crystallization method. The precursor ZrCl 4 obtains oxide and hydroxide bridges after standing at room temperature, which promotes the formation of [Zr 6 O 4 (OH) 4 ] 12+ clusters and induces rapid and excessive nucleation rate, and further leads to the coordination perturbation of UiO-66-NH 2 nanoparticles to achieve Zr-MOG-12. The as-prepared Zr-MOG-12 integrates the more hierarchical porous structure of gel-based soft materials and the amorphous structure of lower-coordinated active sites, which exhibits superb adsorption capacity for Pb(II) with excellent selectivity and reusability, indicating that Zr-MOG-12 is more promising to removal Pb(II) in practical water treatment . In addition, the transformation of amorphous Zr-MOG-12 to highly crystaline Zr-MOF’ has been achieved by the solvothermal reorganization using glacial acetic acid as the crystallization promoter. The novel methods proposed in this study successfully link crystalline MOF with amorphous MOG, providing new opportunities for facile preparation and transformation of MOFs and MOGs.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）