JOURNAL OF BIOMATERIALS APPLICATIONS
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2021
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IF 2.646
Ying Zhang,Ting-Ting Li,Bing-Chiuan Shiu,Jia-Horng Lin,Ching-Wen Lou
Metal-organic framework materials not only possess porous structures, but also have excellent antibacterial properties. It is of great practical significance to prepare new antibacterial materials with excellent antibacterial effect by metal-organic framework materials. In our study, Zeolitic Imidazolate Framework-8 (ZIF-8) nanomaterials with antibacterial properties were prepared via the solvent method and diethanolamine template method. The materials were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), cold field-emission scanning electron microscope (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption experiment, antibacterial experiment, and biocompatibility experiment. Results showed that ZIF-8 prepared by solvent method has a more typical hexagonal structure, larger specific surface area, and smaller pore size, and the values are 1812.07 m2g−1 and 2.2412 nm, respectively. At the same time, the materials prepared by the two methods have excellent antibacterial properties, and exhibit good biocompatibility at low concentrations, the antibacterial activity against Escherichia coli and Staphylococcus aureus are higher than 95%, and the cell viabilities of the selected five material concentrations of 12.5 µg mL−1, 25 µg mL−1, 50 µg mL−1, 100 µg mL−1 and 200 µg mL−1 are more than 70%. Therefore, this study provides a feasible method for preparing Nano-scale antibacterial functional particles, and it is of great significance to broaden the application field of ZIF-8 materials and prepare ZIF-8 drug-delivery functional materials.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Hengyan Ma,Mengya Li,Ting Yu,Hui Zhang,Minghua Xiong,Feng Li
In the present study, a magnetic mimic multi-enzyme system was developed by encapsulating the aryloxyphenoxypropionate (AOPP) herbicide hydrolase QpeH and alcohol oxidase (AOx) in zeolitic imidazolate framework (ZIF-8) nanocrystals with magnetic Fe3O4 nanoparticles (MNPs) to detect AOPP herbicides. The structural, protein loading capacity and loading ratio, porosity, and magnetic properties of QpeH/AOx@mZIF-8 were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, nitrogen sorption, and vibrating sample magnetometry. An AOPP herbicide colorimetric biosensor made with QpeH/AOx@mZIF-8 had the highest sensitivity toward quizalofop-P-ethyl (QpE) with a limit of detection of 8.2 μM. This system was suitable to detect two other AOPP herbicides, including fenoxaprop-P-ethyl (FpE) and haloxyfop-P-methyl (HpE). The practical application of the biosensor was verified through quantitative analysis of QpE residues in industrial wastewater and field soils. Furthermore, QpeH/AOx@mZIF-8 exhibited excellent long-term storage stability (at least 50 days), easy separation by magnet, and reusability (at least 10 cycles), supporting its promising role in simple and low-cost detection of AOPP herbicides in real environmental samples.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
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IF 3.171
Chen Gu,Wenqiang Weng,Cong Lu,Peng Tan,Yao Jiang,Qiang Zhang,Xiaoqin Liu,Linbing Sun
MXenes have attracted increasing research enthusiasm owing to their unique physical and chemical properties. Although MXenes exhibit exciting potential in cations adsorption due to their unique surface groups, the adsorption capacity is limited by the low specific surface area and undeveloped porosity. Our work aims at enhancing the adsorption performance of a well-known MXene, Ti 3 C 2 T x , for methylene blue (MB) by decorating tiny ZIF-8 nanoparticles in the interlayer. After the incorporation of ZIF-8, suitable interspace in the layers resulting from the distribution of tiny ZIF-8 appears. When employing in MB, the adsorption capacity of composites can reach up to 107 mg·g −1 while both ZIF-8 (3 mg·g −1 ) and Ti 3 C 2 T x (9 mg·g −1 ) show nearly no adsorption capacity. The adsorption mechanism was explored, and the good adsorption capacity is caused by the synergistic effect of ZIF-8 and Ti 3 C 2 T x , for neither of them is of suitable interspace or surface groups for MB adsorption. Our work might pave the way for constructing functional materials based on the introduction of nanoparticles into layered materials for various adsorption applications.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
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IF 8.742
Yayu Wei,Zhe Yang,Ling Wang,Yifei Yu,Hong Yang,Hua Jin,Peng Lu,Yi Wang,Dapeng Wu,Yanshuo Li,Chuyang Y. Tang
Introduction of nanomaterials into thin–film nanocomposite (TFN) membranes can improve the solvent permeance for organic solvent reverse (OSRO) and forward osmosis (OSFO) processes. However, the severe nanomaterials aggregation and the formation of defects in membrane rejection layer, which decreased the rejection of membrane against various solutes. Herein, we proposed a novel strategy of thin–film nanocomposite (TFNi) membrane featuring an interlayer of metal–organic framework (MOF, ZIF–8) by one–step fabrication in the simultaneous phase–inversion and crosslinking process. This strategy integrates the precipitation of polyimide (PI) substrates, crosslinking between the PI and hexanediamine, and generated ZIF–8 nanocrystals through the interfacial diffusion. Furthermore, one–step strategy of ZIF–8 effectively mitigate its agglomeration in the surface of support layers by SEM characterization. A prepared polyamide (PA) rejection layer with high crosslinking and low thickness was characterized by XPS and TEM. The resulting TFNi membranes with ZIF–8 interlayer (OSFO ISG –2.5) showed a molecular weight cut–off of ~500 Da, the remarkable DI water and THF permeances (9.73 and 1.62 L m–2 h–1 bar–1 under RO mode), and the higher ethanol fluxes (2.10 ± 0.11 LMH under FO mode and 2.97 ± 0.31 LMH under PRO mode). In addition, the solvents permeance of the OSFO ISG –2.5 membrane was furtherly improved by 10 h DMF activation without loss of the polystyrene rejection in RO mode. This study also provides insight for the preparation of ZIF–8 on the polymer's matrix for large–scale production.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Yao Zhang,Chao Wu,Huiming Zhu,Baoquan Zhang
Superhydrophobic materials for efficient separation of stabilized oil/water emulsions are in an urgent need to deal with an enormous amount of oily wastewater worldwide. The stainless steel mesh supported zeolitic imidazolate framework-7 (ZIF-7-coated SSM) was fabricated by way of secondary hydrothermal growth, it was further modified by using coordinated polysiloxane elastomer (CPE). Based on characterization by using SEM, XRD, FT-IR and contact angle measurements, the as-synthesized CPE-ZIF-7-coated SSM possessed a rough surface structure of microscale ravines with both superhydrophobicity and superoleophilicity. The stabilities of CPE-ZIF-7-coated SSM were investigated with respect to various treatments including high temperature, corrosion and ultrasonication. The self-healing ability and working mechanism of CPE-ZIF-7-coated SSM were explored by responding to continuous abrasion and O 2 plasma etching. The CPE-ZIF-7-coated SSM exhibited high water-in-oil emulsion separation efficiencies of over 99.9% with a remarkably fast self-healing ability upon damage in less than 10 min without any externally imposed input of matter/energy. The superhydrophobic CPE-ZIF-7-coated SSM with fast self-healing ability would be a promising alternative material for practical applications in separation of emulsive oil/water mixtures.
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高影响因子
Nanoscale
·
2021
·Vol. 13
·期 39
·16571-16588
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IF 7.79
Yu Zhang,Yifeng Yang,Jinsheng Shi,Lili Wang
Weak acidity (6.5–6.9) and limited H2O2 level in the tumor microenvironment (TME) usually impact the therapeutic effect of chemodynamic therapy (CDT) for cancer. A Specific TME promotes the formation of an immunosuppressive microenvironment and results in high rate of recurrence and metastasis of cancer. Fe3O4@ZIF-8/GOx@MnO2 multi-layer core shell nanostructure was constructed as a hybrid nanozyme. After magnetic targeting of the tumor site, the outermost MnO2 shell catalyzed H2O2 in TME to produce O2 and was broken due to the reaction with glutathione. Due to the acid response, the ZIF-8 layer would crack and release glucose oxidase (GOx) and Fe3O4. The generated O2 was utilized by GOx in starvation therapy to consume glucose and produce H2O2 and gluconic acid. The Fenton reaction efficiency of Fe(II) was improved by the increased H2O2 concentration and the enhanced acidity in TME. At the same time, the intrinsic photothermal effect of Fe3O4 upon 808 nm laser irradiation promoted the activity of MnO2 and GOx as oxidase, and Fe(II) as catalase-like, and ablated the primary tumor. Moreover, the hybrid nanozyme can facilitate the transformation of M2-type macrophages to M1-type, and strong systemic antitumor immune effect was induced. A synergy of multiple therapeutic modes including starvation therapy, CDT, photothermal therapy (PTT), and immunotherapy can be realized in the hybrid nanozyme for tumor therapy.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Lei Wang,Huaizhi Liu,Jianguo Zhao,Xiaojia Zhang,Chengzhi Zhang,Guanhua Zhang,Quanhui Liu,Huigao Duan
Lightweight, self-supporting, and flexible carbon nanofiber membranes are desirable electrode candidates for flexible supercapacitors. At present, inadequate electrical contact between adjacent nanofibers, poor wettability with electrolyte, and limited specific surface area are still challenges for further improving the capacitive property. In this work, a novel porous N-doped carbon nanofiber network membrane in which continuous ZIF-8-derived carbon layers “welding” adjacent carbon nanofibers is synthesized through bifunctional ZnO nanoparticles contained in the nanofibers. Here, ZnO nanoparticles not only serve as the pore-forming agent to create multiscale pores, but also provide zinc sources for in-situ growth of ZIF-8 nanoparticle layer. Because of highly interconnected networks, special spider-web-like surface nanostructure, and hierarchical pores, the as-prepared carbon membrane reveals superior electrical conductivity, high specific surface area and excellent wettability. An excellent rate performance with 75.5% capacitance retention even with 70-times current density increase and extraordinary cycling stability (98.8% capacitance retention after 100,000 cycles at 10 A g −1 ) could be found, when the optimized hierarchically porous N-doped welded carbon network membrane is used as the electrode. The quantitatively electrochemical kinetic analysis of the electrode indicates that fast double layer capacitive behavior is dominant at high current densities. Meanwhile, the flexible quasi-solid-state devices display excellent electrochemical stability in severely bending states.
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JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Qiuyun Zhu,Xi Tang,Shasha Feng,Zhaoxiang Zhong,Jianfeng Yao,Zhong Yao
Severe air pollution causing by particulate matter and VOCs calls for multifunctional air purification media. Here, we report a novel bioinspired bead-on-string-like ZIF-8@SiO 2 composite nanofiber membrane, which has a synergistic promoting effect on particulate matter (PM) capture and gas pollutants adsorption. The flexible SiO 2 nanofiber membrane was fabricated by electrospinning, while zeolitic imidazolate framework-8 (ZIF-8) nanocrystals were grown on the nanofibers by controlling the crystallization by contra-diffusion. The resultant ZIF-8@SiO 2 composite membrane showed high removal efficiency of 99.96% for incense smoke which attributed to the ZIF-8 enhanced surface area and electrostatic interaction between beaded ZIF-8 nanocrystals and PM particles. Further, the uniformly loaded ZIF-8 nanocrystals with compatible pore size, large microporosity and specific surface area enhanced the formaldehyde adsorption efficiency to 79.53% in 2 h. The design of the ZIF-8@SiO 2 composite membrane with fascinating PM removal efficiency and excellent formaldehyde adsorption capacity would make it a promising medium for multicomponent air purification.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Yuanyuan Rao,Fang Ni,Yun Sun,Benwei Zhu,Zhi Zhou,Zhong Yao
Uniform zeolitic imidazolate framework (ZIF-8) nanoparticles were synthesized then dispersed into a rubbery polydimethylsiloxane (PDMS) matrix to prepare ZIF-8/PDMS hybrid membranes. The performance of the ZIF-8/PDMS hybrid membrane was evaluated in ethanol-water and aromatic-water model systems. The ZIF-8/PDMS hybrid membranes, loaded with 6 wt% of the nanoparticles, separated of ethanol and the characteristic compounds in blackberry juice, linalool, benzaldehyde and ethyl acetate more effectively than a pure PDMS membrane. Based on these results, a ZIF-8/PDMS hybrid membrane was used to separate the volatile aromatic compounds (VACs) from natural blackberry juice. The total volatile aromatic compounds in the blackberry juice decreased significantly after pervaporation treatment. The recovery of linalool, benzaldehyde and ethyl acetate at 50 °C were 93.8%, 92.1% and 75.2%, confirming the high performance of ZIF-8/PDMS hybrid membrane.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Li Yin,Zhenguo Liu,Yufu Yang,Yang Guo,Guanying Zhang,Fangyuan Gai,Yuhui Ao,jieran Liu,Bingjing Xin,Yunling Liu
Organic dyes pollution of contaminated water is posing serious environmental crisis. In this work, the robust absorbent of organic dyes has been proposed by using carboxyl-modified carbon fiber (CF) cloths as scaffolds to structure ZIF-8 powder with specific shape (area: 10 × 10 cm 2 and thickness: 2 mm). The grinding ZnO and 2-methylimidazole powder was deposited on –COOH groups functionalized CF-cloth via an in situ non-solvent synthesis process without using binder. This as-synthesized robust absorbent was assembled layer-by-layer with four folds of ZIF-8 layers by inserting three folds of CF (3k, T300) between ZIF-8 layers. The surface microstructure of ZIF-8 and robust absorbent has been investigated and compared by X-ray diffraction. The techniques including Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and X-ray photoelectron spectroscopy (XPS) have been proposed to confirm the interfacial adhesion and surface modification of CF cloths layers in robust adsorbent. Moreover, compared to ZIF-8, CF-ZIF-8 composite exhibited improved thermal stability by the thermal gravimetric (TG) analysis. The CF-ZIF-8 composite exhibited two types of adsorption curves by using UV absorption spectra , which could discriminate six kinds of organic dyes by charge effect. The UV absorption of MB(Methylene Blue), CV(Crystal Violet) and TB(Toluidine Blue) dropped dramatically and exhibited only 4.5%, while the UV absorption of RB19 (Reactive Blue 19), RhB (Rhodamine B) and MO (Methyl Orange) exhibited 58.2%, 58.3% and 70.0% of original absorption intensity after conducted adsorption processes of 700 min, respectively. The as-synthesized robust adsorbent would be easily adapted and recycled from wasted water of real industry fields, which may attract more attentions to build the bridge between MOFs powder materials to carbon fiber cloth for real use.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Rui Ding,Wenji Zheng,Kai Yang,Yan Dai,Xuehua Ruan,Xiaoming Yan,Gaohong He
High permeability and selectivity are desirable for mixed matrix membranes (MMMs) based CO 2 separation. Herein, a microemulsion based mixed linker strategy is proposed to introduce amino groups during the growth of ZIF-8. Compared to post-synthetic modification, this method presents a less reduction in S BET of ZIF-8, which is beneficial for CO 2 adsorption. By controlling the ratio of 2-methylimidazole to 2-aminobenzimidazole, NH 2 -ZIF-8 with various morphologies and sizes were synthesized and serve as the filler to fabricate the MMMs for CO 2 capture. From the scanning electron microscopy (SEM), no obvious agglomerations or defects are observed in ZIF-8/Pebax MMMs, due to the amino groups in ZIF-8 can interact with the amide in Pebax chain, which can improve compatibility between ZIF-8 and Pebax. With the amino groups, NH 2 -ZIF-8 shows higher affinity with CO 2 than that of non-amine-functionalized ZIF-8, leading to an enhancement in the separation performances. When the MMM doped with 6 wt% of NH 2 -ZIF-8(10), the CO 2 permeability reaches up to 163.8 Barrer, which increases by around 53% and 107.6% in contrast with the ZIF-8/Pebax MMM and pure Pebax membrane. Besides, the CO 2 /N 2 selectivity is enhanced by around 10% and 27%, respectively. These results indicate that amine-functional modification by mixed ligands is a useful way to construct MOFs-based MMMs with high performance for CO 2 /N 2 separation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Hao Guo,Taotao Sun,Liguo Yue,Ning Wu,Qi Li,Wenqing Yao,Wenhu Yang,Wu Yang
As a kind of energy storage device, supercapacitors have attracted the attention of researchers, and the development of high-performance electrode materials is also the focus of attention. In this paper, template synthesis and pyrolysis were combined to prepare high performance porous carbon electrode materials. The carbonized electrode material effectively increased the capacitance storage capacity and charge transfer rate. The results revealed that the derivative had a relatively low charge-transfer resistance and high specific capacitance of 1059 F·g −1 at a current density of 1.0 A·g −1 in a three-electrode system. To further exploring practical application, a device based on the derivative and hemp-activated carbon asymmetric supercapacitor was assembled in 0.1 M Na 2 SO 4 neutral electrolyte, which exhibited an energy density of 20.35 Wh·kg −1 at a power density of 400 W·kg −1 . Interestingly, it showed capability retention of nearly of 91.7% and columbic efficiency of 100% even after 10000 charging/discharging cycles in the neutral electrolyte.
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高影响因子
危险品化学品经营许可证（带存储）