APPLIED SURFACE SCIENCE
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2026
·
IF 6.9
Zhengjun Su,Jing Ma,Haiwei Yang,Yunpan Ying,Dahuan Liu,Qingyuan Yang
The development of polyamide nanofiltration membrane is hindered by its low permeability. Rationally designing thin film nanocomposite (TFN) membranes through adding filler to polyamide layer is a promising method for improved nanofiltration performance. However, regulating the morphology and polymerization process of polyamide layer through the design of filler morphology is challenging. In this work, we designed a ZIF-8 nanowire regulated TFN membrane. Different from the reported nanomaterials, the irregular surface of ZIF-8 nanowire is conducive to forming crumpled membrane surface by controlling the interfacial polymerization process. Meanwhile, ZIF-8 nanowire can construct net-like channels in polyamide matrix for improved water permeability. The influence of ZIF-8 nanowire on morphology, chemical property, and desalination performance of TFN membrane were studied. As a result, the optimized TFN-Z2 membrane with ZIF-8 nanowire loading of 0.10 w/v% shows a flux of 6.42 LMH bar −1 , which increased by 189 % than that of the polyamide membrane. Meanwhile, the TFN-Z2 membrane maintained excellent rejection performance for salts (93.60 %, 91.20 %, 91.20 %, and 78.60 % for Na 2 SO 4 , MgSO 4 , MgCl 4 , and NaCl, respectively). The results can provide a foundation for the preparation of more advanced membranes.
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MICROCHEMICAL JOURNAL
·
2021
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IF 4.821
Lu Gao,Jianbin Zheng
A ZIF-8 supported Sb 2 S 3 fabrication carbon coating ZnS-Sb 2 S 3 nanocomposite was synthesized with the template of zeolitic imidazolate framework (ZIF), through by the introduction of resorcinol-formaldehyde (RF) organic polymer to establish carbon layer, and by vulcanization process and metal-ion exchange reaction. The morphology and structural characteristics of carbon coating ZnS-Sb 2 S 3 were investigated by X-ray diffraction spectroscopy, Raman spectra, X-ray photoelectron spectroscopy, Scanning electron microscopy and Transmission electron microscopy. Evidence indicated the nanocomposite has a polygonal structure with ZnS as core, Sb 2 S 3 as inner shell, carbon layer coating as outer shell. This material was employed to prepare an electrode detected DA sensor; and its electrochemical impedance properties exhibited that carbon layer coating Sb 2 S 3 nanoparticles can greatly improve the conductivity of nanocomposite. The proposed sensor showed some outstanding electrocatalytic performances, including a linear range from 0.2 to 3.1 μM, 3.1 to 711.1 μM, and a low detection limit of 0.6 μM and an excellent sensitivity of 458.3 and 184.6 μA mM −1 cm −2 . Therefore, the carbon coating ZnS-Sb 2 S 3 nanocomposite can be an effective electrode-modifying material that can be promisingly used in other electrochemical applications, and this method of preparing nanomaterials offer a novel perspective for electrochemical design the of other nanostructured systems.
研究领域:
材料科学
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电化学
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纳米技术
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传感器与生物传感器
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分析化学
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CHEMICAL PHYSICS
·
2025
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IF 2.4
Junjie Zhang,Haixia Chen,Jijun Ding,Yongfeng Qu,Haiwei Fu
The superhydrophobic membranes with low-cost, eco-friendly, and high-performance is a current research focus. In this paper, ZIF-8 particles are synthesized at room temperature and subsequently mixed with graphene oxide with controlled proportions. The resulting composite membrane is fabricated on a fibrous substrate via vacuum filtration. By tailoring the surface microstructure, the wettability of the composite film is effectively modulated. Experimental results demonstrate that the membrane exhibits superhydrophobicity, with a water contact angle of 156° and a separation flux of 31,428.77 L·m −2 ·h −1 for low-viscosity oils. The membrane shows excellent separation efficiency (>99 %) across oils with varying viscosities. Furthermore, the separation performance remains stable, with efficiency above 99 % after 20 cycles and above 98 % after a 30-day long-term test. The combination of facile preparation, environmental friendliness, and outstanding separation performance highlights the potential of this composite membrane for low-cost, high-efficiency oil-water separation applications.
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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
·
2023
·
IF 5.6
Liangliang Cheng,Wanlu Zheng,Ya-Nan Zhang,Xuegang Li,Yong Zhao
A highly sensitive fiber-optic urea sensor was designed and experimentally demonstrated based on surface plasmon resonance (SPR) effect and metal-organic zeolite framework (MOF), [zeolite imidazole skeleton-8 (ZIF-8)]/urease modification. The SPR effect was excited by plating gold film on the thin core fiber (TCF) in multimode-thin core-multimode fiber (MMF) structure, which behaved high refractive index sensitivity. The ZIF-8/urease composite film was grown on the gold film by rapid aqueous phase synthesis method, in which the ZIF-8 could immobilize more urease and made urease and urea fully contact. Since the urease catalyzed urea hydrolysis would change the refractive index, the measurement of urea concentration was realized with high sensitivity and good selectivity. Experimental results showed that the urea measurement sensitivity of the proposed sensor could reach 6 nm/mM within the concentration range of 1–7 mM, which has great application potential in the field of human health monitoring.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Kun Li,Han Tang,Mingke Yang,Xiaowan Peng,Ruihang Zhang,Chun Deng,Yunlei Peng,Bei Liu,Changyu Sun,Guangjin Chen
Separation of light hydrocarbon isomers is always an important and challenging task in the petrochemical industry due to their similar physicochemical properties. This paper presents the absorption-adsorption hybrid method to separate pentane isomers using a flowable zeolitic imidazolate framework-8 (ZIF-8) slurry prepared with N, N′-Dimethylpropylene urea (DMPU) and water. Firstly, the single-component kinetic sorption profiles for n-pentane and iso-pentane in the slurry were measured. It appears significant sorption kinetic differences between the pentane isomers in ZIF-8/DMPU-water slurry. Subsequently, the separation performances for n/iso-pentane gas mixtures were studied systematically. The results show that the selectivity for pentane isomers using ZIF-8/water slurry is extremely high (1877 specifically), and the selectivity decreases gradually when the DMPU content in the solvent increases, while conversely the sorption speed increases rapidly. The selectivity as a function of time was described to graphically characterize the kinetic-based separation for pentane isomers. With excellent behavior in selectivity, sorption speed, sorption capacity (1.10 mol/L for n-pentane in ZIF-8/DMPU slurry), and renewability, this absorption-adsorption hybrid method is of great potential in the separation of pentane isomers.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
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IF 6.1
Yanzheng Ji,Xingyu Liu,Haochen Li,Xuan Jiao,Xinquan Yu,Youfa Zhang
The performance of activated carbon (AC) will be severely affected for carbon dioxide (CO 2 ) capture in flue gas, as they usually suffer from competitive adsorption of water vapor. Establishment of a barrier against moisture on the surface of porous adsorbent material could potentially address this issue. Zeolite-like metal–organic frameworks (ZIF-8) as a promising adsorbent material demonstrates hydrophobic properties, large specific surface area, and highly porous structure. Here, by further growth of ZIF-8 on polydopamine (PDA)-coated bio-based carbon (AC@PDA), we fabricate hydrophobic final product (AC@ZIF-8). The CO 2 capture capacities of AC@ZIF-8 was 41.69 cm 3 /g, which is only 13.61% lower than that of the initial AC under dry conditions. The hydrophobic ZIF-8 layer can effectively prevent water molecules from reaching the interior AC. Therefore, the adsorption of CO 2 for AC@ZIF-8 decreased by only 16.74% under high relative humidity, while it decreased by 61.27% for bare AC. This strategy will broaden the applications of carbon-based adsorbents for CO 2 capture under severely humid conditions. We believe that this approach is also applicable for an extensive set of CO 2 capture materials that suffer from water instability.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 47
·e53193
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IF 3.057
Xiuzhou Lin,Qiang Peng,Song Duan,Chunjiang Zhang,Xulei Chen,Zhiqiang Deng,Baojie Dou,Yingjun Zhang,Xiulei Gao,Zhiwen Fang
In this study, ZIF-8 modified fluorinated graphene composite (FG@ZIF-8) was innovatively prepared and used as a novel functional filler to improve the anticorrosion performance of epoxy coating on Q235 carbon steel. The morphology and structure of FG@ZIF-8 composites were characterized by scanning electron microscopy (SEM), x-ray powder diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and x-ray photoelectron spectroscopy (XPS) tests. The results showed that the structure and morphology of the composites largely depended on the composition ratio of FG and ZIF-8. The mechanical properties and corrosion resistance of FG@ZIF-8 modified coatings were also investigated. The unique two-dimensional sheet structure and insulation of FG in the FG@ZIF-8 filler can not only inhibit the penetration of corrosive media but also discourage electron migration effectively on the interface of coating/matrix during the electrochemical reaction. Meanwhile, the chemical cross-linking between the amine groups in ZIF-8 and the epoxy group increases the degree of densification of the coatings. Besides, the 2-methylimidazole from the dissolution of ZIF-8 on FG@ZIF-8 will also inhibit the corrosion reaction. These advantages endow the FG@ZIF-8 modified epoxy coatings an excellent long-term corrosion resistance. Our findings may inspire the development of new graphene-based materials with superior protective properties for metallic materials.
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Biomaterials Science
·
2022
·Vol. 10
·期 17
·4837-4847
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IF 7.59
Essam Abdo Mohammed Saad Obaid,Shuai Wu,Yuan Zhong,Meng Yan,Li Zhu,Bibo Li,Yi Wang,Wei Wu,Guixue Wang
Nanomedicines represent new promising strategies for treating atherosclerosis (AS), because they enhance drug bioavailability and have lower side effects. Nevertheless, nanomedicines have several challenges with these advantages, including a limited circulation life, lack of precise targeting, and insufficient control of drug release. Accordingly, the development of drug delivery systems (DDSs) with abilities to enhance the payload delivery to the AS plaque lesion and to control drug release can boost the therapeutic efficacy and safety for AS treatment. Herein, we employed a one-step self-assembly approach for effectively encapsulating the anti-AS drug simvastatin (SIM) in zeolitic imidazolate framework-8 (ZIF-8) (SIM/ZIF-8), and then coated it with hyaluronic acid (HA) to fabricate the SIM/ZIF-8@HA nanoplatform. The resulting nanoplatform could efficiently accumulate in plaque regions through the specific recognition between HA and CD44. Meanwhile, the acid environment breaks down ZIF-8 to release SIM. The in vitro and in vivo experiments demonstrated that SIM/ZIF-8@HA could inhibit the proliferation of smooth muscle cells and have good biocompatibility. Moreover, SIM/ZIF-8@HA can effectively suppress the development of AS plaques without any considerable side effects in mice treatments. The findings revealed that SIM/ZIF-8@HA may be a promising nanomedicine for safe and efficient anti-AS applications.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Yingjian Ma,Rui Zhao,Hongyi Shang,Shuo Zhen,Linjie Li,Xinyu Guo,Meng Yu,Yong Xu,Jianguo Feng,Xuemin Wu
Pesticides are the primary defending strategy against major biological invaders and important for ensuring national food security. Intelligent nanopesticides with precise controlled release modes are currently an emerging area of interest in the field of green, safe, and sustainable pesticide formulation. In this study, β-cypermethrin (β-CYP) was loaded into ZIF-8 by the one-pot method, which successfully prepared a pH-responsive delivery nanoparticle (β-CYP/ZIF-8) to control termites. Results demonstrated that β-CYP/ZIF-8 had a mean diameter of 188 ± 2 nm and a loading capacity of approximately 21%. In vitro release experiments showed that β-CYP/ZIF-8 releases better in acidic than in neutral conditions due to the presence of intermediate acid-unstable imidazole organic compounds. The acidic microenvironment in which termites thrive can promote β-CYP release due to ZIF-8 decomposition, thus improving pesticide targeting and reducing toxic side effects. The bioactivity survey confirmed that β-CYP/ZIF-8 could control termites (Coptotermes formosanus Shiraki) for a longer duration compared to commercial wettable powder (WP) and emulsifiable concentrate (EC). Moreover, an acute toxicity test showed an over 2- and 10-fold reduction in the acute toxicity of β-CYP/ZIF-8 to earthworms and zebrafish, respectively, compared to that of commercial WP and EC. Finally, the cytotoxicity assay of β-CYP/ZIF-8 showed higher safety to human hepatocyte LO2 cells. Overall, these β-CYP/ZIF-8 nanoparticles, prepared using the one-pot method, have great application potential in sustainable pest management and protection of the ecological environment.
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MOLECULES
·
2022
·Vol. 27
·期 13
·4312
·
IF 4.927
Xiaowei Wang,Yingjie Zhao,Yiqi Sun,Dahuan Liu
Residual antibiotics in wastewater have gained widespread attention because of their toxicity to humans and the environment. In this work, Cu-doped ZIF-8s (Cu-ZIF-8s) were successfully synthesized by the impregnation of Cu2+in ZIF-8 and applied in the removal of ofloxacin (OFX) from water. Remarkably, excellent adsorption performance was obtained in Cu-ZIF-8s, especially for Cu-ZIF-8-1, in which the adsorption capacity (599.96 mg·g−1) was 4.2 times higher than that of ZIF-8 and superior to various adsorbents reported previously. The adsorption kinetics and adsorption isotherm follow the pseudo-second-order model and the Langmuir model, respectively. Furthermore, the removal efficiencies of OFX in Cu-ZIF-8-1 reached over 90% at low concentrations. It was revealed that electrostatic interaction and complexation play important roles in the adsorption process. In addition, the material can be regenerated by simple methods. Therefore, the obtained Cu-doped MOFs may have a promising application in the treatment of antibiotic-containing wastewater.Keywords:adsorption;complexation;metal-organic frameworks;ofloxacin
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Yongmei Ge,Kui Wang,Jiayi Liu,Ye Tian,Huili Li,HuiZhen Wang,Zhaowei Lin,Mingxia Qiu,Bin Tang
Chronic osteomyelitis (COM) is an inflammatory bone disease caused by bacterial infection. Conventional treatment with antibiotics is prone to resistance and other side effects, and it is ineffective against inflammation caused by infection and bone loss . To treat COM comprehensively, based on the acidic microenvironment of osteomyelitis, we used ZIF-8 and celecoxib to construct a multifunctional intelligent drug release system with pH response effect, named [email protected] Material characterization revealed that celecoxib is successfully loaded into ZIF-8. Ion release and drug release experiments indicated that [email protected] can respond well to the pH and intelligently control the release of ions and drugs. Antibacterial assays manifested that [email protected] is able to inhibit the growth of bacteria significantly. In vitro cell experiments demonstrated that [email protected] can significantly up-regulate the expression of osteogenesis-related cytokines and down-regulate the levels of inflammatory factors. Studies verify that the novel drug release system possesses multiple functions: antibacterial, osteogenesis, anti-inflammatory and intelligent release, suggesting a tremendous clinical promise for the treatment of COM.
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Membranes
·
2022
·Vol. 12
·期 2
·122
·
IF 4.562
Tong Li,Yuhong Wang,Xinyan Wang,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Zhongpeng Wang,Xiuju Wang,Liguo Wang
Forward osmosis membranes have a wide range of applications in the field of water treatment. However, the application of seawater desalination is restricted, so the research of forward osmosis membranes for seawater desalination poses new challenges. In this study, zeolitic imidazolate framework-8 (ZIF-8) was synthesized by a mechanical stirring method, and its crystal structure, surface morphology, functional group characteristics, thermochemical stability, pore size distribution and specific surface area were analyzed. The cellulose acetate (CA)/ZIF-8 mixed matrix forward osmosis membrane was prepared by using the synthesized ZIF-8 as a modified additive. The effects of the additive ZIF-8 content, coagulation bath temperature, mixing temperature and heat treatment temperature on the properties of the CA/ZIF-8 forward osmosis membrane were systematically studied, and the causes were analyzed to determine the best membrane preparation parameters. The structure of the CA membrane and CA/ZIF-8 mixed matrix forward osmosis membranes prepared under the optimal conditions were characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), contact angle and Atomic force microscope (AFM). Finally, the properties of the HTI membrane (Membrane manufactured by Hydration Technology Innovations Inc.), CA forward osmosis membrane and CA/ZIF-8 mixed matrix forward osmosis membrane were compared under laboratory conditions. For the CA membrane, the water flux and reverse salt flux reached 48.85 L·m−2·h−1and 3.4 g·m−2·h−1, respectively. The reverse salt flux and water flux of the CA/ZIF-8 membrane are 2.84 g·m−2·h−1and 50.14 L·m−2·h−1, respectively. ZIF-8 has a promising application in seawater desalination.Keywords:desalination;ZIF-8;forward osmosis membranes
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