CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Pengfei Lin,Xiwei Qu,Bhaskar Jyoti Deka,Chao Hu,Lei Zhao,Dongyun Wu,Chunhai Yi,Min Wei Boey,Muhammad Usman Farid,Alicia Kyoungjin An,Jiaxin Guo
The photocatalytic Metal-organic frameworks (MOFs) membrane addresses challenges faced by MOF powders in practical applications such as aggregation and difficult recovery, but its current application is mainly confined to wastewater treatment. Expanding the application of MOFs membranes to CO 2 reduction could unleash their greater potential in energy conversion and storage field. In this study, ZIF-67 was deposited on polyacrylonitrile (PAN) nanofiber membranes (NFMs) using an in-situ growth technique, followed by thermal stabilization to produce SZIF-67/PAN NFMs for photocatalytic CO 2 reduction. ZIF-67 was uniformly and densely distributed on the NFMs, with a mass loading of up to 8 wt%. The thermal stabilization process significantly enhanced the photothermal conversion capability and solvent resistance of the NFMs, enabling SZIF-67/PAN NFMs to exhibit outstanding photocatalytic activity even under mild environmental conditions, with a remarkable CO generation rate of 39,250 μmol g −1 h −1 . Furthermore, the performance remained at 70 % even after five consecutive tests. This study presents a novel and effective method for preparing MOF NFMs with excellent photocatalytic CO 2 reduction performance, offering valuable insights for advancing the practical application of MOF materials.
研究领域:
材料科学
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环境科学
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huan Wang,Yuan Bai,XiaoBing Jiang,Min Zeng
Zeolitic imidazole frameworks (ZIFs) create broad platforms to study electrochemical energy storage for their numerous advantages (e.g., their high surface area, hierarchical porous structures and flexibility templates). In the present study, metal-coordinated ZIF-derived Bimetal-Organic Framework exhibiting a well-defined morphology of rhombic dodecahedron was facilely synthesized through the addition of a certain molar ratio Ni 2+ or Mg 2+ when ZIF-67 was being grown. Via pyrolysis, the bimetallic composite materials, i.e., NiCo 2 O 4 @C and MgCo 2 O 4 @C were produced, exhibiting bimetallic active sites, large surface area and conductive carbon frameworks. When acting as the anode materials in lithium-ion batteries, the produced composite materials displayed excellent durability and greater specific capacity. The mentioned excellent electrochemical performances were contributed to by the stable carbon frameworks because of their greater electronic conductivity and higher electrochemical activity. Moreover, the present study presented novel ideas to synthesize the identical type of MOFs materials and can broaden their applications.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Linghui Yin,Min Hu,Dongyan Li,Jiahao Chen,Kai Yuan,Yishui Liu,Zhaoxiang Zhong,Weihong Xing
A multifunctional air filtration membrane is urgently required for high efficiency removal of particulate matter (PM) and capture of airborne toxic gases (SO2, NOx, VOCs, etc.). Zeolite imidazole frameworks (ZIFs), as a subclass of metal–organic frameworks (MOFs), hold promise for poisonous pollutant capture due to their excellent adsorption performance and high thermal and chemical stability. Here, a facile strategy is demonstrated to synthesize a multifunctional air filtration membrane through in situ growth of ZIF-67 nanoparticles on a flexible silica nanofiber membrane (ZIF-67@SiO2 NFM), which significantly improved the contact area of the membrane with SO2 and PM. When it underwent a standard PM removal test, the prepared ZIF-67@SiO2 NFM showed the highest PM2.5 removal efficiency of 100% at a relatively low pressure drop of 335 Pa with the impregnation time being 24 h. At the same time, due to the load of ZIF-67, the SO2 adsorption capacity up to 1013 mg/g could be realized in the obtained membrane when exposed to a SO2/N2 mixed flow with a humidity of 55%. Furthermore, during the incense smoke experiment, the PM2.5 filtering efficiency of the prepared ZIF-67@SiO2 membrane could reach 98.9% under an initial concentration of 1000 μg·m–3. This work proposes a simple and practical strategy to not only prepare a high-performance multifunctional nanofiber membrane but also achieve the capture of SO2 and PM with high efficiency.
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
NANOTECHNOLOGY
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2021
·Vol. 32
·期 38
·385602
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IF 3.874
Ximing Zhang,Jingyu Wang,Yang Fan,Hengdong Ren,Zhenying Liu,Yanfen Wang,Yin Liu,Hongcun Bai,Lingbing Kong
In this work, we prepared NiCo alloy/C with rhombic dodecahedron structure and superior microwave absorption performance by using ZIF-67 as the raw material. The rhombic dodecahedron NiCo alloy/C was with rough particles on the surface was photographed by field emission scanning electron microscopy. By adjusting the doping amount of Ni and the temperature of pyrolysis, improved the impedance matching of NiCo alloy/C. Specifically, NiCo alloy/C exhibits a minimum reflection loss of −65.48 dB at 13.48 GHz, while the thickness is 1.63 mm. Defects introduced in the Ni doping process and the special rhombic dodecahedral structure can cause multiple loss mechanisms. Therefore, this NiCo alloy/C composite has the potential to be a potential microwave absorber material with lightweight and high microwave absorption properties.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Mengxin Wang,Yijie Sun,Chao Huang,Ping Wang,Hao Cheng,Chengyou Sun,Danni Jiang,Dingxun Ling,Ke Ouyang,Chonglin Feng
The limited mass transfer of short-lived radical species is an inherent drawback of heterogeneous oxidation processes. Herein, we fabricated zeolitic imidazolate framework (ZIF)-67 loaded nanoreactors with precise pore sizes based on anodic alumina oxide (AAO) templates to achieve nanoscale spatial confinement for enhanced radicals-mediated oxidation reactions. The prepared ZIF-67@AAO membrane/peroxymonosulfate (PMS) system exhibits perfect catalytic performance with a rhodamine B (RhB) removal of 100 % within 60 s under an AAO pore size of < 20 nm. The reaction rate constant of RhB degradation by the ZIF-67@AAO <20 nm /PMS system was 2.52 and 893 times that by the ZIF-67@AAO 200–300 nm /PMS and ZIF-67/PMS system (no confinement), respectively. The ordered mesoporous structure of the ZIF-67@AAO nanoreactors provided many channels for PMS and RhB molecules to enter the confined inner space of the catalyst, leading to a significant improvement in catalytic performance under nanoconfinement. Radical quenching and electron paramagnetic resonance (EPR) results indicated that SO 4 − , ·OH, 1 O 2 , and O 2 − were generated in the ZIF-67@AAO/PMS system, and their amounts were affected by spatial confinement and achieved the maximum at a pore size of < 20 nm. Furthermore, the ZIF-67@AAO catalytic membrane exhibited attractive long-term operation stability with perfect activity and neglectable Co leaching. The results of this study provide an important reference for designing novel catalytic membranes for water decontamination.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2019
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IF 5.77
Lulu Xu,Ye Xiong,Baokang Dang,Zhangning Ye,Chunde Jin,Qingfeng Sun,Xiaohong Yu
Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe 3 O 4 /ZIF-67 (Fe 3 O 4 /ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe 3 O 4 /ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe 3 O 4 /ZIF-67 particles, Fe 3 O 4 /ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm 3 g −1 . Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe 3 O 4 /ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Liang Yin,Xiangqun Chu,Huimin Chen,Bin Liu,Pinhua Zhang,Lulu Du,Guangliang Cui,Li Lv
Nitrogen dioxide (NO 2 ) is a major atmospheric pollutant that poses a significant threat to human health, the development of efficient and accurate NO 2 gas sensors is crucial for air quality monitoring. Metal-organic frameworks (MOFs) are considered ideal materials for gas sensing due to their exceptional tunability, large surface area, high porosity, and abundant active metal sites. However, the poor conductivity of MOFs limits their applications in electrochemical sensors. This study presents a ZIF-67/rGO nanocomposite synthesized by combining reduced graphene oxide (rGO) with ZIF-67 via a one-step solution method. Experimental results demonstrate that the ZIF-67/rGO nanocomposite sensor shows significant sensitivity to NO 2 gas at room temperature. At 5 ppm NO 2 , the response is approximately 13-fold higher than that of the pure rGO sensor. More importantly, the sensor achieves a detection limit as low as 0.5 ppm, with an ultra-fast response time of 15 s and recovery time of 40 s at room temperature. Additionally, the sensor exhibits excellent repeatability, long-term stability, and high selectivity for NO 2 . This study presents an effective strategy for accurate real-time detection of low concentration NO 2 gas and provides valuable insights for designing MOF-based hybrid sensors at room temperature.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Chengshun Tang,Guanya Ji,Yuhao Lu,Oluwafunmilola Ola,Qijian Niu
In recent years, Metal-Organic Frameworks (MOFs) have garnered significant attention for their potential in tetracycline (TC) removal. However, pure MOFs typically exist in powdered form and tend to aggregate in water, which greatly limits practical applications. To address this issue, a three-dimensional composite material was prepared by ZIF-67 grown onto cotton fibers (ZIF-67 0.50 @CF). This composite not only enhances adsorption capacity but also reduces the adsorption equilibrium time compared to most other adsorbents. ZIF-67 0.50 @CF boasts a BET specific surface area of 257.74 m²·g −1 , with pores consisting mainly of mesopores and micropores. Moreover, ZIF-67 0.50 @CF exhibits excellent adsorption capabilities for TC across a broad pH range of 4–9 and displays notable resilience against environmental interference. The adsorption behavior of ZIF-67 0.50 @CF is more consistent with the Langmuir model, with a maximum adsorption capacity of 432.619 mg·g −1 for TC. Mechanistic research reveals that adsorption primarily involves chemical interactions (complexation, π-π stacking, and electrostatic interaction) and physical pore filling. Additionally, the favorable plasticity of ZIF-67 0.50 @CF allows it to be fabricated into various shapes for use as filling materials, exhibiting admirable TC removal performance in continuous flow adsorption experiments.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2019
·Vol. 92
·期 5
·740-748
·
IF 1.24
Mingyan Li,Dasheng Gao,Shuang Cui,Yan Shi,Ningning Liu
Fe 3 O 4 /ZIF-67 composite was successfully fabricated by a facile method and used as adsorbent to remove direct blue 80 (DB80, azo dye) from water. Characterizations of Fe 3 O 4 /ZIF-67 composite were performed by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy (FTIR), and magnetic property analysis. As an adsorbent, the factors (such as adsorbent dose, pH, initial concentration, contact time, and temperature) affecting the adsorption performance of adsorbent were investigated. The optimal adsorption condition is 5 mg of Fe 3 O 4 /ZIF-67 composite in 8 ml of DB80 solution (70 mg/L) for 60 min at 318 K, and the pH value has little effect on the adsorption performance. The adsorption isotherm, kinetics, and thermodynamics of DB80 adsorbed on the Fe 3 O 4 /ZIF-67 composite were also studied. The experimental results revealed that the experimental data followed the Langmuir model and the adsorption behavior could be well explained by pseudo-second-order kinetic model. Thermodynamic analysis indicated that the adsorption was a spontaneous and endothermic process. Furthermore, the mechanism of DB80 adsorbed on the Fe 3 O 4 /ZIF-67 composite was proposed. The occurrence of adsorption might be caused by the π-π stacking interaction between Fe 3 O 4 /ZIF-67 composite and DB80. Practitioner points Fe 3 O 4 /ZIF-67 composite was successfully fabricated via a facile method. Fe 3 O 4 /ZIF-67 composite was used to the adsorptive removal of direct blue 80 (azo dye). The kinetic characteristics and thermodynamic parameters were analyzed. The adsorption behavior might be ascribed to the π-π stacking interaction between Fe 3 O 4 /ZIF-67 composite and DB80.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yaochi Guo,Liangdong Zhao,Jing Fang,Xiuwu Liu,Junjie Qi,Hao Li
Antibiotics exhibit high persistence and ecotoxicity in aquatic environments, and numerous existing methods for their degradation are either expensive or inefficient. In this study, a wood-based microreaction system (ZIF-67@FDNW) was developed for the efficient degradation of antibiotics. The microreaction system consists of a wood-based microreactor, in which ZIF-67 is in situ loaded, and a PMS solution. The wood-based microreactors are fabricated through the selective removal of lignin and hemicellulose from natural wood, followed by subsequent chemical modification. The loading of ZIF-67 onto the surface of the wood-based microreactor enables the catalytic degradation of tetracycline using persulfate (PMS) as the oxidant. The microreactor was characterized using SEM, EDS, FT-IR, XRD, and XPS techniques. Additionally, the kinetics, degradation performance, and underlying principles of the microreactor in the PMS system were thoroughly investigated. The wood-based microreactor exhibits high efficiency (94 %) and degradation rates under varying pH values and initial concentrations. Furthermore, it demonstrates remarkable regeneration capability (The degradation efficiency over a 12-hour period remains consistently high at 85 %) and stability. This study expands the application of wood in antibiotic wastewater treatment and presents a novel approach utilizing MOFs catalyzed PMS system for TCH removal from water environments.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Zhiying Li,Zhiwei Li,Ning Zhang,Junjiang Bao,Xiaopeng Zhang,Gaohong He,Cong Chen,Yongchen Song
Ultrathin and defect-free MOF membranes are actively pursued to realize high-performance hydrogen purification and carbon capture, which are of great significance for energy conservation and environmental sustainability. Zeolitic imidazolate framework-67 (ZIF-67) possesses exceptional pore apertures for sieving hydrogen from other larger gases. However, the preferential heterogeneous nucleation and growth of ZIF-67 crystals greatly challenge the synthesis of ZIF-67 membranes. In this work, a tunable-reaction-zone contra-diffusion synthesis is proposed to effectively assemble ZIF-67 nanocrystals into ultrathin GO laminates. The contra-diffusion-match growth of ZIF-67 constructs a compact ZIF-67@GO hybrid structure with superior H 2 /CO 2 separation factor of 140.8 and H 2 permeance of 1.7 × 10 −7 mol m −2 s −1 Pa −1 , transcending the state-of-art upper bounds. The excellent separation performance is attributed to the collaborative effect of the size-sieving and the selective attraction of the ZIF-67@GO hybrid structure. Long-term operation also reveals the superior stability of the ZIF-67@GO hybrid membrane for H 2 /CO 2 separation. The rational-design approach grants a novel way to fabricate ultrathin and defect-free ZIF-67 crystalline membranes for high-performance gas separation.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2015
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IF 2.133
Muhammad Ammar,Sai Jiang,Shengfu Ji
A new strategy has been developed for the encapsulation of the phosphotungstic heteropoly acid (H 3 PW 12 O 40 denoted as PTA) into zeolite imidazolate framework (ZIF-67) cage and the PTA@ZIF-67(ec) catalysts with different PTA content were prepared. The structure of the catalysts was characterized by XRD , BET, SEM, FT-IR, ICP-AES and TG. The catalytic activity and recovery properties of the catalysts for the Friedel-Crafts acylation of anisole with benzoyl chloride were evaluated. The results showed that 14.6–31.7 wt% PTA were encapsulated in the ZIF-67 cage. The PTA@ZIF-67(ec) catalysts had good catalytic activity for Friedel-Crafts acylation. The conversion of anisole can reach ~100% and the selectivity of the production can reach ~94% over 26.5 wt% PTA@ZIF-67(ec) catalyst under the reaction condition of 120 °C and 6 h. After reaction, the catalyst can be easily separated from the reaction mixture by the centrifugation. The recovered catalyst can be reused five times and the selectivity can be kept over 90%.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）