SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Peizhang Zhou,Jiang Cheng,Yuanyang Yan,Shouping Xu,Cailong Zhou
Homogeneous hydrophobic ZIF-67 decorated copper mesh was prepared by ultrafast electrodeposition and subsequent hydrophobization with stearic acid or 1-dodecanethiol. The preparation can be completed within 9 min under room temperature. Based on the hard-soft-acid-base (HSAB) theory, there exists difference of the interaction between Co 2+ and specific groups (carboxy or sulfhydryl), the oil/water separation and dyes adsorption performances were thus affected after ZIF-67-coated copper mesh was hydrophobized. The separation efficiency of the hydrophobic meshes for various oil/water mixtures was all greater than 98%, and remained almost no decline after several cycles of separation. However, the intrusion pressure of ZIF-67/copper mesh modified by 1-dodecanethiol is higher than the one modified by stearic acid. At the same time, the 1-dodecanethiol modified ZIF-67/copper mesh displayed a high adsorption capacity for Congo red (near 2000 mg/m 2 ), while the adsorption rate of the mesh modified by stearic acid is significantly faster. This work proposed a simple and fast method to build continuous, homogeneous MOFs film for oil/water separation and dyes adsorption.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Lihua Liu,Jianan Dai,Yuan Ji,Baoxing Shen,Xing Zhang,Robert J. Linhardt
Herein, we designed a BODIPY-based probe (BZA-BOD@ZIF-90) with good stability through the encapsulation of metal-organic frameworks (MOFs). BZA-BOD@ZIF-90 can selectively detect protamine based on an aggregation-induced emission (AIE) effect. In the present strategy, the designed BZA-BOD@ZIF-90 showed excellent fluorescence response to protamine with a low detection limit of 0.07 μg/mL and the detection was not disturbed by other possible competing substances. Compared with previous methods, BZA-BOD designed by this method is simpler to obtain, and also can achieve sensitive and accurate determination of protamine. Subsequently, the nanocomposite BZA-BOD@ZIF-90 was successfully applied to detect protamine spiked in human serum. In addition, due to the strong binding effect of heparin on protamine, when heparin was added to the complex, the fluorescence intensity of the BZA-BOD@ZIF-90 weakened, thus, it can also be utilized for heparin detection. The medical application of protamine and heparin suggests that this fluorescent molecular device has prospects for certain clinical applications.
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Journal of Materials Chemistry A
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2021
·Vol. 9
·期 7
·4167-4175
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IF 12.732
Haoyu Li,Peng Mu,Jian Li,Qingtao Wang
Purification of highly emulsified oily wastewater is of significance but challenging due to the critical limitations of low efficiency and serious membrane blocking. Herein, inspired by the desert beetle's capability of water-collection in air, we first constructed an inverse desert beetle-like membrane to achieve oil capture in water, thus improving the separation performances of the surfactant-stabilized oil-in-water emulsion. The as-prepared nanofibrous membrane consists of hydrophobic/oleophilic ZIF-8 bumps and underlying underwater superoleophobic polyacrylonitrile (PAN), and possesses a similar structure to desert beetles but with opposite wettability. In the process of emulsion demulsification, besides the sieving effect of the underlying traditional underwater superoleophobic PAN membrane, the bumpy oleophilic ZIF-8 particles of the composite membrane can capture oil, thus strengthening the demulsification ability of the membrane. Furthermore, the separation efficiency of the inverse desert beetle-like membrane is up to 99.92% for surfactant-stabilized oil-in-water emulsion, which is superior to that of traditional single underwater superoleophobic PAN membranes lacking the hydrophobic bump structure. Moreover, for light oil-in-water emulsion, the permeation flux also increases because the captured tiny oil droplets can aggregate subsequently and grow large enough to detach from the underlying surface which greatly reduces the incidence of filter cake formation and congestion. This inverse desert beetle-like membrane opens up new avenues for designing advanced membranes in the oil/water emulsion separation field.
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CELLULOSE
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2021
·Vol. 28
·期 5
·3097-3112
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IF 5.044
Huang Qiumei,Zhao Chuanshan,Li Xia
The separator is a key component of the lithium-ion battery (LIB), which not only prevents the anode and the cathode from contacting, but is also related to the performance of the LIB. However, the widely used polyolefin separator has the disadvantages of inferior electrolyte retention capability and poor electrolyte wettability. Therefore, the development of high-performance separators for LIB has attracted widespread attention. In order to enhance the electrolyte retention capacity of the separator, the bacterial cellulose (BC)/zeolitic imidazolate framework-67 (ZIF-67) composite separator was prepared by introducing ZIF-67 on the BC nanofibers. It was found that the introduction of ZIF-67 in BC membrane significantly improved the pore structure and enhanced the electrolyte retention capability, thus contributing to the transfer of lithium-ion, increasing the ionic conductivity (0.837 mS cm −1 ). In terms of ionic conductivity, BC/ZIF-67 separator has achieved a great improvement compared to polypropylene (PP) separator (0.096 mS cm −1 ). Besides, the prepared BC/ZIF-67 composite separators hardly shrink at high temperatures. The discharge capacity retention of the LIB using BC/ZIF-67 separator was 91.41% after 100 cycles (0.2 C). Meanwhile, LIB with BC/ZIF-67 separator showed a large discharge capacity (156 mAh g −1 ) and improved rate performance. Therefore, the BC/ZIF-67 composite membrane has good development potential in the direction of LIB separator. Graphic abstract
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APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Peng Zhang,Ziyan Wang,Yan Zhang,Jian Wang,Wenqing Li,Lina Li,Peiping Zhang,Cundi Wei,Shiding Miao
In this work a Pd/Fe-Co-Ni layered double hydroxide (LDH) composite was prepared and investigated in the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY). Hollow nanocages of ternary Fe-Co-Ni LDH were constructed by stacking the LDH nanosheets edge-to-face which inherited the rhombic dodecahedral structure of ZIF-67 templates. Uniform palladium (Pd) nanocrystals with cubic shapes were imbedded in the LDH nanocages via a solvothermal method. The hydroxyl groups on LDH supports were critical to inhibit the association of excess hydrogen atoms on the catalyst, so less MBY molecules were converted to 2-methyl-2-butanol (MBA) during the hydrogenation catalysis. Under optimized reaction conditions the hydrogenation activity of Pd/Fe-Co-Ni LDH was significantly improved, and the conversion of MBY was higher than 99% with selectivity of 2-methyl-3-buten-2-ol (MBE) exceeding 99%. The catalyst was easily recovered and had little reduction in catalytic performance during the cycling reactions.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Rui Li,Wei Li,Chun Jin,Qinyu He,Yinzhen Wang
ZIF-8@TiO 2 micron composite, one kind of new high-efficiency photocatalyst was prepared by hydrothermal method in this work. We compared the ability of ZIF-8, TiO 2 nanospheres and ZIF-8@TiO 2 to catalytically degrade tetracycline. The results of the characterization show that the TiO 2 nanospheres grow uniformly on the surface of ZIF-8, and ZIF-8 and TiO 2 are linked together by chemical bonds. The synergistic effect of ZIF-8 and TiO 2 greatly enhances the catalytic ability of the composite photocatalyst. In ZIF-8@TiO 2 micron composite, ZIF-8 provides a new way for photogenerated electron transfer as a charge separator, to reduce the charge recombination rate. Since the hybrid combines the advantages of ZIF-8 and TiO 2, ZIF-8@TiO 2 exhibits excellent ability to catalytically degrade tetracycline. The possible photocatalytic mechanism of the hybrid photocatalyst was also discussed.
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CELLULOSE
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2020
·Vol. 27
·期 6
·3287-3300
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IF 4.21
Zhang Su-Feng,Li Hao,Hou Chen,Liu Li-Na,Wang Yang,Zhao Meng-Ke,Liang Chen
Abstract The treatment of dyes in wastewater is important to solve environmental problems. Advanced oxidation processes has been proved to be an effective treatment. In this work, a novel nanocomposite catalyst of ZIF-9@Fe 3 O 4 (cobalt-containing zeolitic imidazolate framework-9 coated Fe 3 O 4 nanocomposite) modified reduced graphite oxide (RGO) was prepared for the first time and coded as ZIF-9@CA-Fe 3 O 4 /RGO. Then, ZIF-9@CA-Fe 3 O 4 /RGO was immobilized on a cellulose membrane to obtain a composite membrane, which was used as a composite catalyst for activating peroxymonosulfate to degrade methylene blue (MB). The results demonstrated that the composite membrane could efficiently degrade approximately 96% of MB in 9 min without adjusting the initial pH and maintain good catalytic activity even after seven cycles. Furthermore, the composite membrane can be easily separated from the solution at the end of the reaction. This work indicates that the composite membrane has a broad application prospect in industrial applications. Graphic abstract
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MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Hao Guo,Tian Fan,Wenqin Yao,Wenhu Yang,Ning Wu,Hui Liu,Mingyue Wang,Wu Yang
Herein, a novel electrochemical sensor based on ZIF-67/MWCNT-COOH/Nafion composite was designed and prepared for simultaneous detection of 4-aminophenol (4-AP) and acetaminophen (AMP). The electrochemical behaviors of the 4-AP and AMP on the ZIF-67/MWCNT-COOH/Nafion electrode were explored via cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results exhibited that the designed electrochemical sensor possessed superior electrocatalytic activity for 4-AP and AMP, which was attributed to the highly ordered porous structure of ZIF-67, the outstanding electrical conductivity and high electrocatalytic activity of MWCNT-COOH. Under optimization conditions, the DPV response of the prepared electrode depicted a wider linear response concentration range of 0.2 to 200 μM for 4-AP, and 0.1 to 100 μM for AMP, respectively. And the lower detection limits (LOD) of 0.01 and 0.07 μM were obtained for 4-AP and AMP, respectively. More importantly, the acquired electrode was applied to Yellow river water and Paracetamol tablets for analysis of 4-AP and AMP, which exhibited satisfying recovery of 98.2% ~ 106.7% for 4-AP and 94.7% ~ 99.6% for AMP, respectively. In a word, the constructed electrochemical sensing platform delivered a promising potential in real application.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
M. Usman Tahir,Hina Arshad,Heng Zhang,Zhiyan Hou,Jide Wang,Chao Yang,Xintai Su
Single imidazolate framework-67 (ZIF-67) is commonly used as a template to prepare layered double hydroxides (LDHs) with specific morphology to improve the performance of materials. Herein, the Co 2+ ion in ZIF-67 is partially substituted by Ni 2+ to obtain the dodecahedron bimetallic imidazolate framework (CoNi-ZIF). Subsequently, using bimetallic CoNi-ZIF as the sacrificial template, CoNi-LDH hierarchical hollow cage structures with wrinkled nanosheet arrays are synthesized at room temperature and in aqueous solution by an inexpensive and environment friendly surfactant-free approach. The optimized etched CoNi-LDH4 has a maximum specific capacitance of 1877 F g −1 at a current density of 1 A g −1 , and cycling stability of 99.89% after 5000 cycles, which is significantly better than that of ZIF-67 derived CoNi-LDH67 (1357 F g −1 at 1 A g −1 , cycling stability of 73.35%). The asymmetric supercapacitor with CoNi-LDH4 as a cathode and activated carbon (AC) as anode has an energy density of 49.3 Wh kg −1 at 750 W kg −1 power output and stable cycling performance (capacity retention of 92.13% after 5000 cycles). This study shows the prospect of bimetallic CoNi-ZIF derived LDHs nanostructures prepared at room temperature and in aqueous solution to improve the performance and stability of supercapacitors.
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PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2020
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IF 10.257
Qian Ren,Junsong Mou,Yanmei Guo,Huiqi Wang,Xiyue Cao,Feifei Zhang,Jianfei Xia,Zonghua Wang
A simple homogeneous electrochemical aptasensor was designed by using target-responsive substrate releasing from aptamer-gated zeolitic imidazolate framework-8 (ZIF-8)-derived porous carbon nanocontainer. The nanocontainer (Z-700) was prepared by calcination of ZIF-8 at 700 °C. Z-700 had great biocompatibility, high surface areas and pore volume , especially the graphene-like π-rich structure, which was beneficial for adsorbing aptamer easily. The electroactive dyes methylene blue (MB) was then trapped in the pores of Z-700 and easily capped with aptamer as gatekeeper based on π-stacking interaction. Upon addition of target protein thrombin (Thb), the Thb could specifically recognize and combine with its aptamer to form complex. Thereafter, the aptamer bio-gate opened and the MB released from the pores, which could be detected on the screen-printed electrode. Under the optimized conditions, the proposed Thb aptasensor showed a wide detection range from 1 fM to 1 nM with a low detection limit of 0.57 fM. The strategy by using ZIF-8-derived porous carbon and aptamer bio-gate provides a promising scheme for developing simple, rapid, reliable and ultrasensitive bioassays, which has a great potential as a powerful tool in disease diagnosis and biomedicine.
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PubMed
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 7
·期 2
·1901490
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IF 4.713
Yixing Zhan,Yating Wang,Ming Wang,Xiaoqing Ding,Xinlong Wang
The nano metal–organic framework particles (nano ZIF-8) are grafted onto the surface of short carbon fibers (SCFs) by a facile in situ growth method in order to functionalize SCFs. The morphology, crystal structure, and chemical element composition of modified SCFs (ZIF-8@SCFs) are investigated. The grafted nano-ZIF-8 could remarkably enhance the roughness, polarity, and wettability of SCFs surface and promote the curing reaction of epoxy composites. The tensile strength, flexural strength, elastic modulus, toughness, and impact strength of the epoxy composites with 1 wt% ZIF-8@SCFs are increased by 25%, 31%, 51%, 28%, and 42% compared to that of the composites with 1 wt% SCFs, respectively. Furthermore, the storage modulus ( E ′) and glass transition temperature ( T g ) are enhanced from 2558 MPa and 108.2 °C to 3000 MPa and 147.6 °C. The significant improvement in mechanical and thermomechanical properties of the prepared composites could be ascribed to the ameliorated wettability, enhanced mechanical interlock, and increased chemical bonding induced by ZIF-8@SCFs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zijun Yu,Fujiang Geng,Mengjie Han,Dudu Li,Zibo Yang,Zhihua Qiao
6FDA-APBIA was in-situ incorporated into the ZIF-9 framework via coordination bonds. • 6FDA-APBIA incorporation effectively increased the ultra-microporous volume of ZIF-9. • polyZIF-9 based MMMs exhibit excellent H 2 /CH 4 and CO 2 /CH 4 separation performance. • pZ9–30 MMM shows 2.2-fold (H 2 /CH 4 ) and 1.4-fold (CO 2 /CH 4 ) selectivity over pure PI. • pZ9–30 MMM has good interfacial compatibility and long-term operational stability. Mixed-matrix membranes (MMMs) have broad application prospects in the field of gas separation, particularly for the efficient separation of H 2 /CH 4 and CO 2 /CH 4 , which is of great significance for hydrogen energy recovery and natural gas purification. This study proposes a strategy to in situ incorporate 6FDA-APBIA polymer into the ZIF-9 framework via coordination bonds, constructing polyimide-based ZIF-9 materials (pZ9) with tunable pore structure. The characterization results confirm that the appropriate incorporation of polymer increased the ultra-microporous volume of ZIF-9 for achieving molecular sieving. Furthermore, pZ9 materials were used as fillers to prepare self-supported MMMs with varying loadings. Notably, the gas permeation tests revealed that the MMM with 30 wt% pZ9 loading exhibited excellent H 2 /CH 4 and CO 2 /CH 4 separation performance (α H2/CH4 ≈ 328.05, α CO2/CH4 ≈ 95.21), both exceeding the corresponding upper bounds. This work provides insights into the design of high-performance MMMs, showing promise for applications in hydrogen recovery and natural gas purification. Download: Download high-res image (100KB) Download: Download full-size image
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