COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Mei Wan,Congling Shi,Xiaodong Qian,Yueping Qin,Jingyun Jing,Honglei Che,Fei Ren,Jian Li,Bin Yu
In this study, three-dimensional flower-like Ni-MOFs were fabricated and successfully functionalized on multi-terminal lamellar MXene (Ti 3 C 2 T x ) by solvothermal method, and their flame retardant application in thermoplastic polyurethanes (TPU) was investigated. As expected, the addition of Ni-MOF@Ti 3 C 2 T x can improve the flame retardancy and smoke suppression properties of TPU. The heat release rate, the smoke release rate, total smoke production, CO and CO 2 release of the composite with only 1 wt% MOF@Ti 3 C 2 T x were significantly reduced by 15%, 44%, 26%, 18%, and 8%, respectively. Furthermore, the carbon residues of TPU/Ni-MOF@Ti 3 C 2 T x composites were about 2–5 times that of pure TPU, indicating that the Ni-MOF@Ti 3 C 2 T x can inhibit the thermal degradation of TPU. The mechanism illustrated that the excellent fire safety properties of TPU/Ni-MOF@Ti 3 C 2 T x composites are due to the physical barrier, catalytical carbonization, and gas-phase flame retardant of Ni-MOF@Ti 3 C 2 T x . In this work, the dispersity, thermal stability, and flame retardancy of MXene were improved due to the modification of MXene with Ni-MOF by chemical bonding and physical adsorption, which can broaden the range of applications of MOFs .
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NANOTECHNOLOGY
·
2023
·Vol. 34
·期 49
·495706
·
IF 3.5
Ziran Zeng,Yunfan Li,Yilin Zhao,Jun Yuan,Longju Yi,Peilong Li,Gary J Cheng,Feng Liu
Due to the advantages of high porosity, excellent conductivity, and tunable morphology, carbonized metal-organic framework (C-MOF) is expected to become an ideal material for constructing high-performance flexible pressure sensor. Herein, to achieving the suitable morphology of C-MOF for piezoresistive sensors, a rapid thermal process (RTP) was used for carbonization of NiCo-MOF, and the petal-shaped NiCo alloy nanoparticles/nanoporous carbon composites (NiCo-NPCs) were obtained. Compared with NiCo-NPCs carbonized by common thermal process (CTP), NiCo-NPCs carbonized by RTP exhibit a modified morphology with smaller particle size and larger most frequent pore diameter. Due to the modified morphology, the piezoresistive sensor with RTP-carbonized NiCo-NPCs has a high sensitivity of 62.13 kPa–1 at 0–3 kPa, which is 3.46 times higher than that of the sensor with CTP-carbonized NiCo-NPCs. Meanwhile, the sensor shows an ultra-wide range of 1000 kPa, excellent cycle stability (>4000 cycles), and fast response/recovery time of 25/44 ms. Furthermore, the application of the sensor in dynamic loading test, airflow monitoring, voice recognition, and gesture detection demonstrates its great application prospects. In short, this work investigates the application of carbonized NiCo-MOFs in flexible pressure sensors, and provides a new strategy to improve the performance of piezoresistive sensors with porous carbon derived from MOFs.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Guoshu Gao,Yumeng Zhao,Peng Zhu,Haiou Liu,Xiongfu Zhang,Yu Guo,Guohui Yang
The Co-gallate MOF membrane exhibits great potential for separating MeOH/MTBE mixtures due to its regular pore size, exceptional stability, and high hydrophilicity. Nevertheless, the rapid nucleation and growth rate of the Co-gallate crystals in the synthesis solution cause poor nucleation on the substrate surface, which presents a significant challenge for the preparation of continuous Co-gallate membranes. In this study, we presented a cobalt carbonate hydroxide nanowire array (Co-NWA)-induced strategy that enabled the rapid and defect-free synthesis of tubular Co-gallate membranes within just 1 h. The presynthesized Co-NWAs on the substrate played as nucleation centers and anchoring sites, facilitating robust membrane formation. The effects of various synthesis parameters on the crystal morphology and membrane compactness were systematically examined. The optimized Co-gallate membrane demonstrated excellent pervaporation performance, with a permeation flux of 2.03 kg m–2 h–1 and a separation factor of 6711 for a 14.3/85.7 wt % MeOH/MTBE mixture, maintaining high performance for over 100 h, indicative of its remarkable long-term stability. This Co-NWA-induced synthesis strategy presents a promising approach for the industrial-scale application of Co-gallate MOF membranes and the design of other MOF membranes, thereby advancing their utility in requisite liquid separation processes.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Linlin Yu,Jiawei Ji,Ruoyu Chen,Qian Jia
Frequent oil spill incidents and increasing amounts of industrial wastewater pose a serious threat to the environment. The use of superhydrophobic materials to separate oil/water mixtures has attracted widespread attention. In this work, a superhydrophobic sponge based on MOF-5 was prepared to achieve efficient continuous oil–water separation and emulsion purification. HDTMS-MOF-5@PDA@MS (H-MOF-5@PDA@MS) not only exhibited superhydrophobic property (WCA = 153.8°, SA = 6.5°) but also exhibited excellent saturated adsorption capacity, with an oil adsorption capacity of 66 (petroleum ether)-168 (chloroform) g/g and oil–water separation efficiency of 99.2%. It also demonstrated efficient performance in various emulsion purification processes. Furthermore, it maintained a stable superhydrophobicity in some extreme environments. H-MOF-5@PDA@MS is expected to have wide application perspective in the fields of environmental pollution control and wastewater treatment due to its low cost, simple process, excellent oil–water separation efficiency, reusability, and environmental friendliness.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Siyu Guo,Yanzhi Cai,Laifei Cheng,Yibing Yuan,Yuhan Wang,Haiming Yu,Zhongyi Hu,Dengpeng Chen,Hudie Yuan
Metal–organic frameworks (MOFs) have attracted attention due to their designable structures. However, recently reported MOF microwave-absorbing materials (MAMs) are dominated by powders. It remains a challenge to design MOF/carbon nanotube (CNT) composite structures that combine the mechanical properties of self-supporting flexibility with excellent microwave absorption. This work involves the hydrothermal approach to grow Ni-MOF of different microstructures in situ on the CNT monofilament by adjusting the molar ratio of nickel ions to organic ligands. Subsequently, an ultraflexible self-supporting Ni-MOF/CNT buckypaper (BP) is obtained by directional gas pressure filtration technology. The BP porous skeleton and the Ni-MOF with a unique porous structure provide effective impedance matching. The CNTs contribute to the conduction loss, the cross-scale heterogeneous interface generated by Ni-MOF/CNT BP provides rich interfacial polarization loss, and the porous structure complicates the microwave propagation path. All factors work together to give Ni-MOF/CNT BP an excellent microwave absorption capacity. The minimum reflection losses of Ni-MOF/CNT BPs decorated with granular-, hollow porous prism-, and porous prism-shaped Ni-MOFs reach −50.8, −57.8, and −43.3 dB, respectively. The corresponding effective absorption bandwidths are 4.5, 6.3, and 4.8 GHz, respectively. Furthermore, BPs show remarkable flexibility as they can be wound hundreds of times around a glass rod with a diameter of 4 mm without structural damage. This work presents a new concept for creating ultraflexible self-supported MOF-based MAMs with hierarchical interpenetrating porous structures, with potential application advantages in the field of flexible electronics.
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Xinyuan Xie,Kai Wei,Dahai Gao,Minmin Zou,Dongmei Zeng,Ting Zhang,You Zhang
Ag-MOF nanoparticles were successfully synthesized using a convenient and mild liquid-phase route, employing AgNO 3 , imidazole, and trimesic acid (H 3 BTC) as a unique multifunctional organic ligand, which, unlike conventional Ag-MOF systems based on simple imidazole, enables the formation of a more stable and highly coordinated framework structure, thereby facilitating uniform particle distribution and improved functionality. This study investigated its antibacterial mechanism and effectiveness when the nanoparticles were integrated into acrylic coatings on AA2024 aluminum alloy substrates. The synthesized Ag-MOF particles demonstrated significant antibacterial activity, which is attributed to the sustained release of Ag + ions and its stable dispersion within the coating matrix. The reduction in E. coli and S. aureus populations was observed to be 95.9 % and 87.2 %, respectively. Benefiting from both the physical barrier effect and the controlled delivery of corrosion inhibitors, the coating exhibits improved durability against corrosion. Additionally, a bifunctional composite coating, featuring a cerium-doped sol-gel application as a bottom layer, was prepared to further improve antibacterial and anticorrosion properties. Electrochemical tests confirm that the composite coating shows the higher impedance modulus and the smaller corrosion current density across the low-frequency domain than neat coating, which was the contribution of the combined action of the inhibitor and the coating's barrier properties. According to the electrochemical impedance after 7 days immersion, the composite coating showed superior corrosion resistance comparing to the neat acrylic coating during immersion of seven days.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yuchen Zhao,Jingyun Guo,Bo Yang,Panyouwen Zhang,Xinyi Wan,Lei Wang,Pingwei Ye,Xinsheng Peng
Solar-driven interfacial water evaporation (SDIWE) technology is an promising way to solve the shortage of fresh water scarcity. However, it is still challenging to generate clean water from organic compound contaminated water through SDIWE. Herein, a 3D multilayer inverted cone solar evaporator based on flexible MOF/graphene oxide composite membrane (CFG membrane) is designed for efficient water evaporation and purification. The Co-Ferrocene (Co-Fc) MOF loaded in the CFG membrane expands the interlayer spacing of GO, providing channels for water transport and enhancing the photothermal performance. The 3D multilayer inverted cone structure enhances the absorption of sunlight through multiple reflections of light between different layers. Based on the above design, the 3D evaporator with three layer CFG membranes demonstrates an evaporation rate of 2.28 kg m-2 h-1 under 1-sun illumination, good salt-resistance and long-term stability. Meanwhile, the Co-Fc MOF in the evaporator acts as an effective Fenton catalyst and promote the generation of ˙OH for the degradation of organic pollutants in wastewater. The degradation rate of pollutants in mixed wastewater (MB: 80 mg L-1; TC: 40 mg L-1; phenol: 40 mg L-1) by CFG-3 evaporator is all over 95%. Almost no volatile organic compounds (VOCs) were detected in the distilled water. This may provide a promising strategy for the efficient solar-driven evaporation and treatment of organic wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Na Zhang,Hang Zhao,Chuying Zhang,Haotong Guo,Zhi-Min Dang,Jinbo Bai
Polymer dielectrics are crucial for electrostatic energy storage and offer broad application prospects in advanced high-power electrical systems, but their energy storage performance declines considerably due to increased conductivity at elevated temperatures. This work presents a structurally-simple high-temperature composite dielectric by incorporating positively charged ultrafine UIO-66 nanoparticles into polyetherimide (PEI) matrix. Be distinguished from traditional sub-micron MOF structures that usually reported in very recently, the newly-found nanoscale effect endows the ultrafine UIO-66 (∼12.9 nm) with largely-increased active sites, surface charge density and electron affinity. These ultrafine UIO-66 nanoparticles can capture free charge through strong electrostatic interactions and introduce deeper traps in composite dielectrics, reducing conduction loss and improving energy storage property significantly at elevated temperatures. Specifically, filling only as tiny as 0.5 wt% ultrafine UIO-66 endows the PEI-based composite with ultra-high energy densities of 5.9J cm −3 and 3.7 J cm −3 accompanied by high charge–discharge efficiencies of 91.4 % and 84.1 % at 150 ℃ and 200 ℃, respectively. These obtained performance in this work surpasses those of most previously reported mono-layered composite counterparts. This study provides a straightforward and effective strategy for designing high-temperature polymer dielectrics in advanced electrical and electronic systems, offering a new route for future applications and developments.
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Molecular Catalysis
·
2024
·
IF 3.9
Xiangsheng Zheng,Xiaohong Hao,Yan Wang,Siyu Gao,Dantong Wen,Jinchuan Wang
The development of novel biocatalysts is essential to promote the commercialization of biodiesel production by transesterification reaction. In this paper, Rhizopus oryzae lipase (ROL) was immobilized on an amino-functionalized zirconium-based metal organoskeleton by interfacial adsorption. The immobilization conditions were optimized and the enzymatic properties were tested, and the resulting novel biocatalysts exhibited higher stability and heat resistance. SEM, XRD and BET analyses were used to characterize the biocatalysts and carrier materials. The catalytic performance of ROL@UiO-66-NH 2 in the production of biodiesel by transesterification reaction was explored, and the production process was optimized by response surface method. The results showed that the conversion rate of FAEE reached 82.05% at molar ratio of ethanol/oil of 15.43:1, reaction temperature of 50.28°C, reaction time of 120.9 min, DES addition of 48.08 wt%, biocatalyst addition of 3 wt%, and ultrasonic power of 90 W. In addition, ROL@UiO-66-NH 2 demonstrated good recyclability, with the catalytic efficiency remaining at 71.87% after five cycles.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 17
·7964-7971
·
IF 2.7
Xuanhua Zhang,Chao Wang,Chao Luan,Mengyin Liao,Wenyuan Xu
Direct methanol fuel cells (DMFC) are a promising new energy source. However, the lack of high-performance and low-cost methanol oxidation electrocatalysts hinders their commercial application. Firstly, we successfully prepared NENU-5-derived molybdenum carbide material (Cu-MoC) via a co-precipitation and high-temperature carbonization method using a material composed of a copper-based metal–organic skeleton and a molybdenum-based carbide as the main body. Secondly, PtCu nano-alloy catalysts (Pt/Cu-MoC) were prepared using a unique, spontaneous single replacement reaction after metal–organic skeleton (MOF) carbonization. Through the synergistic effect between Pt and Cu and the strong interaction between Mo2C and PtCu, the electronic structure of the Pt is modified, the energy of the d-band center is reduced, electron exchange is accelerated, and catalytic activity is enhanced. Compared with a commercial Pt/C catalyst in alkaline environments, the Pt0.10/Cu-MoC catalyst has a better MOR catalytic activity (563.25 mA mgPt−1), which is 1.5 times higher than that of commercial Pt/C (376.67 mA mgPt−1). The Pt0.10/Cu-MoC catalyst has an onset potential for CO oxidation that is 16 mV lower than that of commercial Pt/C, indicating better resistance to CO poisoning. Exploring carbon materials derived from MOFs with excellent junction support and using them as carriers to prepare Pt-based catalysts is a practical and feasible approach. It provides a way to develop new Pt-based catalysts that perform efficient MOR.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Lu Zhang,Jianhao Qiu,Zongpeng Zou,Shengwei Tang,Wenxiang Tang
This work demonstrates the rational design of a Z-scheme CdS/Fe-MOF heterojunction for photo-Fenton processes utilizing in situ generated H2O2 under visible light. The photocatalysts were synthesized by depositing CdS nanoparticles onto MIL-53(Fe), optimizing interfacial charge transfer and light absorption, and ensuring effective spatial segregation of photogenerated carriers, thereby maintaining robust redox potentials. The modified CdS/Fe-MOF exhibited exceptional catalytic performance, achieving 92% degradation of 40 mg·L–1 tetracycline within 15 min, surpassing pure CdS (43%) and MIL-53(Fe) (30%) by factors of 2.3 and 3.3, respectively. Mechanistic studies identified on-site H2O2 generation through two-step oxygen reduction (236 μmol·L–1) and its subsequent activation by Fe3+/Fe2+ cycling to produce ·OH as key pathways, with h+, ·O2–, 1O2, and ·OH collectively driving pollutant degradation. The prepared photocatalysts demonstrated remarkable stability (>90% efficiency after five cycles) and structural integrity, attributed to the robust heterojunction interface. This study provides deep insight into designing Z-scheme photo-Fenton catalysts and advancing sustainable wastewater treatment.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-10
·
IF 5.3
Shen Yang,Chen Rou,Wang Yun,Qiu Yanjun,Zhang Yuting,Wang Xiaoli,Zhou Nandi
Hydrogen a metal–organic framework (MOF)-based ratiometric fluorescent biosensor (Uio-66-N 3 @Cy3) was developed for the determination of hydrogen sulfide (H 2 S). The sensor combines the high specificity of the H 2 S-azide reaction with the inherent self-calibration capability of MOF-based dual-emission signals for efficient detection. The biosensor operates via H 2 S-selective azide-to-amine conversion, which suppresses photoinduced electron transfer to simultaneously restore the MOF's intrinsic fluorescence while maintaining Cy3's stable fluorescence, enabling ratiometric detection. The biosensor exhibits a dual-linear response across 0.5–100 nM and 0.5–4.0 μM, with detection limits as low as 36 pM and 27 nM, respectively. Furthermore, the biosensor shows exceptional selectivity against 18 potential interferents and long-term stability (RSD < 3.5% over 14 days). Importantly, the ratiometric mechanism enables robust performance in complex food samples (beer and milk), yielding 99.74–103.00% recoveries with minimal variance. Unlike intensity-based probes, this system provides intrinsic calibration through simultaneous dual-channel detection, making it ideal for real-world applications. Our work not only delivers a superior H 2 S sensor but also establishes a generalizable platform for ratiometric detection of diverse contaminants in food systems. Graphical
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