ACS Applied Polymer Materials
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2025
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IF 4.7
Hebin Zhang,Zeyu Zheng,Yang Liu,Junhao Liu,Danning Zhao,Jia Du,Kangqi Chang,Huaiyu Shao,Pengli Zhu,Rong Sun
Conventional epoxy composites comprising nanosized silica (SiO2) fillers are encumbered by the inherent trade-off between their stiffness and toughness, which hinders their applications in high-performance scenarios. Herein, zeolitic imidazole framework-8 (ZIF-8) was integrated into epoxy/SiO2 nanocomposites as a curing agent, forming robust covalent bonds that improve thermal–mechanical properties and toughness of epoxy/SiO2 nanocomposites even at low SiO2 filler loadings. Owing to the anchoring effect between ZIF-8 and epoxy resin and strong interfacial bonding strength, the coefficient of thermal expansion of epoxy nanocomposites considerably decreases to 52.3 ppm °C–1, with a filler loading of 28 wt %. Their tensile behavior is strengthened at room and high temperatures due to the synergistic action of nanofillers. Furthermore, the storage modulus and fracture toughness at high temperatures also increase by up to 238 and 41.7%, respectively, showing a substantial and remarkable enhancement in these properties. This study reports a method for preparing multifunctional epoxy composites for electrical packaging and offers insights into the interface–property relationships.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
RARE METALS
·
2025
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IF 11
Zhao Zhi-Hua,Ma Shi-Xin,Pan Ya-Fang,Rahmatullah Abu-Bakker-Md,Shen Xiao-Qing,Shao Zhi-Gang,Wu Lan
To facilitate real-time monitoring and recording of humidity in the environment and to satisfy the requirement for strain performance in certain applications (such as wearable devices), this paper proposes an in-situ method for synthesising Au nanoparticles on ZIF-67. In this study, an Au@ZIF-67 composite humidity-sensitive material was combined with flexible polyethylene terephthalate interdigitated electrodes to create an Au@ZIF-67 flexible humidity sensor. The prepared samples were characterised using X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The humidity-sensitive properties of the sensor were investigated, and its monitoring capabilities in applications involving respiration, gestures, skin, and baby diapers were tested. The experimental results indicate that compared with a pure ZIF-67 humidity sensor, the Au@ZIF-67 (0.1Au@Z) flexible humidity sensor exhibits a 158.07% decrease in baseline resistance and a 51.66% increase in sensitivity to 95% relative humidity, and the hysteresis, response time, and recovery time are significantly reduced. Furthermore, the sensor exhibits excellent characteristics such as high resolution, repeatability, and stability. The obtained results regarding the material properties, humidity sensitivity, and practical application of non-contact humidity monitoring demonstrate that the prepared sensors exhibit excellent and comprehensive performance, indicating their broad prospects in wearable medical devices, wireless Internet of Things, humidity detection in complex environments, and intelligent integrated systems. Graphical abstract
研究领域:
材料科学
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生物医学工程
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传感器技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ning Li,Chao Ma,Dudu Li,Peng Li,Mao Ye,Ziyue Wang,Zhihua Qiao,Chongli Zhong
Mixed matrix membranes (MMMs), combining the advantages of polymer membranes and porous materials, processing the potential to realize large-scale gas separation applications. However, the interfacial defects in MMMs greatly hindered gas separation performance improvement. Therefore, designing an MMM with high loading and good interfacial compatibility remains a critical issue in promoting the application of MMMs. Herein, during in - situ heating process, the melting of liquid ZIF-62 in PBI polymer can largely fill the interfacial defects in MMMs. The microporous transport channels of ZIF-62 glass in MMMs promoted the H 2 diffusion and inhibited the CO 2 and CH 4 diffusion, thus enhancing the H 2 /CO 2 and H 2 /CH 4 separation of MMMs. For mixed gas testing, the 45 wt% ZIF-62 glass/PBI membrane had the maximum H 2 permeability of 459 barrer, and its H 2 /CO 2 and H 2 /CH 4 selectivities were 23 and 57, higher than the gas separation upper bonds. In addition, ZIF-62 glass/PBI membrane exhibited stable separation performance under 1–5 bar pressure. Therefore, the rational combination of MOF glass and polymer matrix could provide promising potential for reducing the interfacial defects of high-loading MMMs, thus enhancing the gas separation performance.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2016
·Vol. 46
·期 2
·554-563
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IF 4.177
Erbin Shi,Huiming Lin,Qian Wang,Feng Zhang,Shaoxuan Shi,Tingting Zhang,Xin Li,Hao Niu,Fengyu Qu
A novel ZIF-Ni composite film has been successfully prepared by a facile method involving the in situ deposition of ZIF-8 on a nickel porous film which is fabricated by selectively etching copper from a dense Ni/Cu alloy film. The nanostructures of the resulting ZIF-Ni composite films are carefully examined by a combination of scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray (EDX), and nitrogen adsorption–desorption. Cyclic voltammetric and amperometric studies show the enhanced electrocatalytic properties of the ZIF-Ni composite film electrodes toward hydrazine oxidation relative to the synergistic effect of ZIF-8 and porous Ni films. The application potential of the composite films as amperometric detectors is explored for the determination of hydrazine. A high sensitivity of 805.5 μA mM−1 for hydrazine detection with a low detection limit of 0.021 μM (S/N = 3) and a wide linear range from 2.5 μM to 28 mM are revealed for this new type of composite film as the detecting electrode. Moreover, the composite films exhibit excellent selectivity and remarkable stability for the oxidation of hydrazine. This can offer new opportunities for the fast and selective detection of hydrazine and provide a promising platform for sensor designs for hydrazine detection.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2024
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IF 5.2
Jinhong Wu,Xiaohan Sun,Haosen Chen,Siwei Guo,Dong Hou,Deyong Wang,Huihua Wang
Oxygen evolution reaction (OER) impedes the electrochemical water splitting for H2 production, ascribing to the depressed kinetics of the four proton-coupled transfer process. Transition metal oxides, especially bimetallic oxides, have been proven to be promising OER electrocatalysts due to their part unoccupied d-band characteristics. More interestingly, oxygen vacancies (Ov) easily constructed in transition metal oxides can modulate the electron structures and thereby boost the OER performance. However, most synthesized processes involving oxygen vacancy engineering, such as atom dopant, chemical/electrochemical reduction, and H2/Ar-dependent calcination, are energy-intensive and time-consuming, largely hampering their commercial applications. Herein, we suggest a simple and facile strategy for fabricating double spinel oxides with abundant oxygen vacancies by calcinating Ni/Fe@ZIF-67/CC precursor under a nonoxidation condition. The obtained Ov-CF1N2O@NC/CC-550 with vast oxygen vacancies exhibits excellent OER performance, representing a lower overpotential of 185 mV at 10 mA cm–2, smaller Tafel slope of 47.3 mV dec–1, as well as faster interface reaction kinetics (Rct = 0.7336). Theoretical calculations further confirm that the excellent electrochemical activity strongly corresponds to the lower d-band center of active sites on the Ov-CoFe2O4 (311) model and decreased reaction Gibbs energy barrier. The work might shed light on oxygen vacancy engineering via a simple and facile strategy and inspire a smart design of multimetallic oxide electrocatalysts with high OER performance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ENERGY
·
2024
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IF 9
Yuechi Che,Xiaopeng Jia,Yongjie Hu,Jian Li,Zhi Wang,Beibei Yan,Guanyi Chen
Tar catalytic removal is a key issue in biomass gasification , which is suffering from catalyst coking and sintering. Microwave technology is attractive due to the high activity on polar molecules and ability to lower activation energy . In this study, the Co/C derived from metal-organic frameworks (ZIF-67) was developed as a bifunctional microwave catalyst that can strengthen the interaction between microwave and tar catalytic reforming , and enhance the anti-coking and sintering ability. The effects of the temperature, heating method, tar concentration, and catalyst support on model tar conversion rate were investigated. The operating conditions at 700 °C and tar concentration lower than 20 g/m 3 can reach a promising conversion rate over 90.15 % under microwave irradiation . On the one hand, microwave heating groups performed better in conversion rate and coking compared to conventional heating, due to the active species generated from the microwave plasma . On the other hand, Co/C showed better performance in catalytic activity and sintering stability, due to the highly dispersion of cobalt nanoparticles and the confinement effect of carbon nanotubes on the catalyst surface . These findings proposed a novel approach for efficient biomass tar removal under microwave irradiation, and offered a potential tool to further reveal the mechanism in microwave driven tar steam reforming system.
研究领域:
能源与环境科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yunshi Liu,Rui Wang,Tong Zhang,Sen Liu,Teng Fei
The development of NO 2 gas sensors is of great importance for air quality monitoring and human health. In this work, In 2 O 3 and zeolitic imidazolate framework-8 (ZIF-8) heterostructures were synthesized and designed as efficient sensing materials for NO 2 detection. The ZIF-8 nanocrystals were uniformly deposited on In 2 O 3 nanofibers (NFs) by using a self-template strategy, where In 2 O 3 /ZnO NFs act as the source of Zn 2+ for the formation of ZIF-8 and as the template. By tuning the amount of Zn 2+ in the composite NFs, different morphologies from In 2 O 3 NFs with minimal ZIF-8 loading to an In 2 O 3 /ZIF-8 core-shell complex were obtained. The optimized In 2 O 3 /ZIF-8 NFs show a remarkably high response to 1 ppm NO 2 (R g /R a = 16.4) and enhanced humidity resistance due to the hydrophobicity of ZIF-8 in comparison with those of the pristine In 2 O 3 NF sensor (R g /R a = 4.9) at 140 °C. The gas sensing mechanism of In 2 O 3 /ZIF-8, which is based on electron transduction, surface chemistry, and the functional interface between the loaded ZIF-8 and In 2 O 3 matrix, was proposed. Additionally, the large number of pores, which were formed by the in situ conversion of ZnO grains in the matrix, ensures that all parts of the In 2 O 3 NFs are accessible to gases. This facile strategy paves the way for the design of metal oxide/MOF complex architectures with tunable metal centers for various applications, including gas sensing.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Yanan Deng,Yuanyuan Shen,Yao Du,Takashi Goto,Jianfeng Zhang
The development of high-performance electrode materials with a far-from-enough energy density has still been crucial for the real applications of supercapacitor technology. In this paper, the N-doped and derivatized-carbon-intercalated Ti 3 C 2 T x , abbreviated as N–Ti 3 C 2 T x /C, was firstly fabricated using ZIF-67 as an intermediate precursor. Then N–Ti 3 C 2 T x /C/CuS was prepared by further intercalation with CuS nanoparticles through a room-temperature-in-situ-reaction route. The doped pyridine N and pyrrolic N, together with derivatized carbon, optimized the surface charge distribution of Ti 3 C 2 T x with increased active sites. In addition, CuS nanoparticles were observed distributed on the surface and between layers of single/multi-layered two-dimensional N–Ti 3 C 2 T x /C nanosheets, forming a heterogeneous three-dimensional structure. Therefore, the specific capacitance of the N–Ti 3 C 2 T x /C/CuS composite at a current density of 1 A g −1 reached 1205.8 F g −1 , about 5 times that of N–Ti 3 C 2 T x /C and 2 times of CuS, also much higher than other composite reported in the literature. The energy density and power density of N–Ti 3 C 2 T x /C/CuS, as a symmetric supercapacitor electrode, are 77.22 Wh·kg −1 and 649.54 W kg −1 , respectively. More importantly, N–Ti 3 C 2 T x /C/CuS has an excellent stability after 3000 cycles, surpassing that of similar electrode materials reported in literature. This study opens a new direction for enhancing the energy density of supercapacitors with modified electrode materials through a MOF-mediated strategy.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2024
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IF 2.6
Mou Yuhang,He Qing,He Ying,Meng Chenyao,Liu Hui,Li Liang
Supercapacitors as green energy storage devices are widely utilized in vehicle manufacturing, rail transportation, power systems, and other fields. In this study, petal-like NiO was synthesized via a one-step hydrothermal method, followed by the preparation of NiO@ZIF-67 composite electrode material at room temperature. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) tests demonstrated that the NiO in NiO@ZIF-67 possesses a porous petal-like structure, with ZIF-67 particles uniformly growing on NiO sheets. The effect of ZIF-67 content on the electrochemical performance of NiO was investigated, and results showed that NiO@ZIF-67/1, prepared with a mass ratio of NiO to Co(NO₃)₂·6 H₂O of 1:1, exhibits the optimal electrochemical performance. The specific capacitance of NiO@ZIF-67/1 electrode material reached 188.44 F·g⁻¹ at 1 A/g. Furthermore, the symmetric supercapacitor assembled with NiO@ZIF-67 exhibited a maximum energy density of 41.76 Wh/kg at 1.4 kW/h, with a capacitance retention rate of 87.2% after 5000 cycles. Graphical abstract
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chunyan Liu,Yanjuan Liu,Yuefei Zhang,Wei Chen,Sheng Tang
In this work, zeolitic imidazolate framework-67 (ZIF-67) with excellent stability synthesized at room temperature was used together with amphiphilic polymer hydrogel to synthesize a captivating mixed-mode silica stationary phase for the first time. The amphiphilic polymer hydrogel prepared by weakly basic cationic and acidic anionic monomers that was modified on the surface of ZIF-67@SiO 2 by a simple physical coating method not only improved the separation performance, but also enhanced the applicability of ZIF-67@SiO 2 in chromatographic analysis. Meanwhile, the porous ZIF-67 effectively alleviated the problem that polymer hydrogel was easy to swell. To sum up, the amphiphilic polymer hydrogel and ZIF-67 showed excellent synergistic effect in improving the separation ability and the applicability of stationary phase. The experimental results demonstrated that the ZIF-67/hydrogel@SiO 2 stationary phase could be applied in various chromatographic separation modes, demonstrating superior resolution and separation selectivity for polycyclic aromatic hydrocarbons, steroid hormones, nucleosides, B-vitamins, sulfonamides, benzoic acids and dinitrobenzene isomers. In this study, the synergistic expression of ZIF-67 and polymer hydrogel provided a new idea for the development of silica stationary phase co-modified by metal-organic framework and hydrogel material. Concurrently, the successful preparation of ZIF-67/hydrogel@SiO 2 composite revealed a new possibility for utilizing ZIF-67 as the functional material of stationary phase, expanding the application potential of ZIF-67 in the field of chromatography.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xinyue Liang,Xiaolong Yao,Sijie Chen,Wei Wang,Hong Zhu,Qingwei Bu,Zheng Liu
The highly toxic and recalcitrant organic pollutant, 2,4-dichlorophenol (2,4-DCP), is commonly found in wastewater. Therefore, it is critical to investigate novel techniques for the efficient removal of 2,4-DCP from wastewater. The present study employed a one-step synthesis method to fabricate ZIF-8/multi-walled carbon nanotubes (ZIF-8/MWCNTs) nanocomposites with well-defined mesoporous structures, which were subsequently coated onto carbon cloth (CC) to form the anode ZIF-8/MWCNTs/CC. Subsequently, the adsorption performance of ZIF-8/MWCNTs toward 2,4-DCP and the adsorption-electrochemical degradation performance of ZIF-8/MWCNTs/CC toward 2,4-DCP were investigated. ZIF-8/MWCNTs exhibit exceptional adsorption capacity and rate toward the 2,4-DCP. At 303 K, it achieved a saturated adsorption amount as high as 1056.78 mg·g - 1 within only 30 min of reaching equilibrium. Moreover, when coated on CC substrates, the internal pore structure of ZIF-8/MWCNTs is effectively exploited during the adsorption. In addition, the incorporation of MWCNTs enhances the conductivity of the ZIF-8/MWCNTs/CC electrodes, leading to reduced resistance and improved electron transfer rate. Notably, ZIF-8/MWCNTs/CC enabled complete removal of a 25 mg·L -1 solution of 2,4-DCP within only 90 min and a 50 mg·L -1 solution within 120 min. Furthermore, the degradation mechanism of 2,4-DCP was analyzed by means of DFT modeling theoretical calculations and intermediate product determination analysis, while evaluating the toxicity of the generated material was evaluated. This study provides improved solutions and strategies for the treatment of chlorophenolic compound pollution in wastewater.
研究领域:
环境科学
·
材料科学
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化学工程
·
水处理
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Xiaoke Wu,Yanwei Yang,Xiaofei Lu,Zhengbao Wang
The preparation of thin metal-organic framework (MOF) membranes by seeded secondary growth method is still a challenge. In this study, relatively thin ZIF-8 membranes with high gas separation performance on alumina hollow fibers are prepared in autoclaves with thick-walled Teflon-liners by the seeded secondary growth method under the modulation of sodium formate. The ZIF-8 membrane thickness can be greatly decreased and the cracks in the membrane layer can be avoided by using thick-walled Teflon-liner (e.g., 7.5 mm) during secondary growth mainly due to the slow heating and cooling of the synthesis solution, which can control the nucleation rate and growth rate of crystals, leading to an appropriate membrane formation rate. A certain amount of sodium formate can introduce ZnO particles in the seed layer to improve the formation of dense ZIF-8 membrane layer and control the growth rate of membrane layer. The suitable amount of sodium formate and thick-walled Teflon-liner are crucial in ensuring the well-intergrowth of relatively thin ZIF-8 membranes. Owing to reduced grain boundary defects, the prepared ZIF-8 membranes show an ideal H 2 /N 2 separation selectivity of 30.9 ± 1.8, which is at least twice the highest value reported in the literature under similar separation conditions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）