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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JOURNAL OF SOLID STATE CHEMISTRY
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2020
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IF 2.726
Yumei Xiao,Dongning Liu,Cheng Liu,Yongchao Wang,Cuijuan Wang
Curcumin (CCM) is a natural ingredient with anti-cancer activity. However, the application of CCM is limited in clinical medicine due to its high hydrophobicity and low bioavailability. Hence, it is necessary for development of a feasible strategy for efficient drug delivery and cancer cell-selective targeting. In recent years, nano-scaled metal-organic frameworks (NanoMOFs) have received much attention as an attractive drug delivery carrier due to their unique features of their various sizes, adjustable pore structures , high stability, and easy surface modification. Here, we report a novel composite nanomaterial (denoted as ZIF-8&α-lip) for CCM loading by one-pot method. This synthetic method is simple and rapid, and the final product (CCM@ZIF-8&α-lip) can be obtained within 20 min. In addition, the obtained CCM@ZIF-8&α-lip shows greater growth inhibition of HepG2 cells in comparison with CCM@ZIF-8. Therefore, ZIF-8&α-lip can be used as an ideal drug carrier and propose a new strategy to improve nanoMOFs performance for efficient drug delivery.
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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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JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
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2020
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IF 1.816
Kiran Abdullah,Xia Kong,Muhammad Imran,Ghulam Mustafa,Yanli Chen
A new hybrid material has been developed by mixing a sandwich-type double-decker, Eu[Pc(OC 4 H 9 ) 8 ] 2 = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninate] with acidified multiwalled carbon nanotubes (aMWCNTs) through non-covalent interactions. The UV-vis spectrum, X-ray diffraction and scanning electron microscope have been employed to reveal the J -aggregate mode and optimized morphology of Eu[Pc(OC 4 H 9 ) 8 ] 2 molecules in the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid material. The gas-sensing devices based on this hybrid material are fabricated by a simple solvent-processing quasi-Langmuir–Shäfer (QLS) progress. The n -type and p -type response is shown by the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid film at room temperature. The detection limit of the hybrid for ammonia and nitrogen dioxide gas is 0.5 ppm and 0.3 ppm, respectively.
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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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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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CHEMOSPHERE
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2022
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IF 8.943
Haotian Jiang,Shenghui Liu
In this work, the self-healing polyethersulfone ultrafiltration membrane constructed by host-guest chemistry between cucurbit [8]uril (CB [8] is a family of macrocyclic compounds comprising 8 glycoluril units) and two guest molecules based on reverse thermally induced phase separation (RTIPS) method was developed, which had excellent self-healing performance, better mechanical properties, and high permeation flux and BSA rejection rate. The membrane autonomously restored it BSA rejection rate up to about 89% from rejection rate levels as low as 21% after damage. The observed self-healing performance were attributed to the swelling of pore-filled CB [8] hydrogel into the damage position, the molecular interdiffusion of the hydrogel chains, the strong hydrogen bond of the hydrogel chains and the host-guest interaction between CB [8] and two guest molecules (HEC-Np and PVA-MV). SEM morphologies illustrated that the prepared pore-filled membrane via the RTIPS method had homogeneous and porous skin surface and sponge-like cross-section, which imparted the prepared membranes with improved permeability and better mechanical properties. Properties of MR-CB [8] membranes, which varied with increased content of CB [8], were evaluated by permeability, water contact angle, thermogravimetric analysis (TGA), mechanical properties, FRR, scanning electron microscope (SEM) and atomic force microscopy (AFM). The contact angle water showed that CB [8] hydrogel enhanced the surface hydrophilicity of the prepared membrane. TGA illustrated that the thermal stability improved with the increased content of CB [8]. The optimal pore-filled CB [8] hydrogel membrane (MR-CB [8] 2 ) exhibited that the pure water flux reached 2100.5 L/m 2 h, while the BSA rejection rate remained at 86.0%. The results of this work suggested pore-filled CB [8] hydrogel membrane was a more promising way to develop polyethersulfone ultrafiltration membranes with self-healing performance.
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NEUROCHEMICAL RESEARCH
·
2022
·Vol. 48
·期 2
·625-640
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IF 4.414
Hui Yuzuo,Zhao Han,Shi Lei,Zhang Haitao
8-Methoxypsoralen (8-MOP) has anti-inflammatory, antioxidant and tissue-repairing abilities. Here, we probed the function and mechanism of 8-MOP in traumatic brain injury (TBI). The in - vivo TBI model was constructed in Sprague-Dawley (SD) rats using controlled cortical impact (CCI) surgery. In parallel, BV2 microglia and HT22 neurons were activated by lipopolysaccharide (LPS) to establish an in-vitro model. The modified neurological score (mNSS) and the Morris water maze experiment were employed to evaluate the rats’ neurological functions. The rats’ brain edema was assessed by the dry and wet method, and neuronal apoptosis in damaged brain tissues was monitored by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling (TUNEL) and Nissl’s staining. Immunohistochemistry (IHC) was applied to verify Iba1-microglial activation in brain lesions of rats. The expression of inflammatory cytokines in BV2 microglia and HT22 neurons in the injured lesion of TBI rats was examined by the enzyme-linked immunosorbent assay (ELISA). The levels of iNOS, COX2, TLR4, PPARγ, STAT3, and NF-κB in brain lesions, BV2 microglia and HT22 neurons were compared by Western blot. As a result, 8-MOP administration reduced inflammation and LPS-induced neuronal damage in BV2 microglia. In vivo, 8-MOP treatment relieved neurological deficits in TBI rats, improved cognitive, learning and motor functions and mitigated brain edema and neuroinflammation induced by TBI. Furthermore, LPS or TBI activated the NF-κB and STAT3 pathways and repressed the PPARγ expression. However, 8-MOP treatment attenuated NF-κB and STAT3 phosphorylation and elevated PPARγ levels. Hence, 8-MOP exerts neuroprotective and anti-inflammatory effects in TBI rats by modulating the PPARγ/NF-κB pathway.
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JOURNAL OF CHEMICAL EDUCATION
·
2026
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IF 3
Junjie Liu,Mengjun Chen,Zhe Chen,Ping Fu,Zhidong Lin,Shenggao Wang,Hongyang Zhao,Zhengbang Wang
Abstract Surface-mounted metal-organic framework (SURMOF) thin-films are receiving growing interest due to their unique structural characteristics and potential applications in advanced nanotechnology. A laboratory teaching experiment based on layer-by-layer (LBL) self-assembly method was developed for the fabrication of zeolitic imidazolate frameworks-8 (ZIF-8) SURMOF thin-films. The experiment integrates concepts from coordination chemistry, crystallography, materials science, and modern characterization techniques, providing students with an interdisciplinary learning experience. Through the automated LBL deposition process, students gain hands-on experience in the coordination-driven growth of SURMOF thin-films and learn the fundamental principles of SURMOF fabrication. Compared with conventional MOF synthesis experiments, this course provides a more intuitive understanding of interfacial coordination assembly and modern thin-film fabrication techniques. In addition, the teaching design emphasizes student-centered learning, scientific discussion, and literature-based problem analysis to enhance students’ critical thinking and research abilities. Assessment results demonstrated that the experiment effectively improved students’ understanding of MOF materials, characterization techniques, and thin-film growth mechanisms while simultaneously strengthening their interdisciplinary scientific reasoning and experimental skills.
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Analytical Methods
·
2023
·Vol. 15
·期 44
·6015-6020
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IF 3.1
Shanshan Liu,Nian Wang,Li Li,Yi Liu
Diseases such as liver cancer, extrahepatic biliary obstruction and osteocarcinoma are closely associated with the abnormal level of alkaline phosphatase (ALP). Hence, it is essential to develop a convenient assay to detect ALP activity. Herein, a novel signal-on fluorescent biosensor on account of the fluorescence signal of the aggregation-induced emission (AIE) fluorochrome 2,2′,2′′,2′′′-((ethene-1,1,2,2-tetrayltetrakis(benzene-4,1-diyl))tetrakis(oxy))tetraacetic acid (EBTAC) encapsulated zeolitic imidazolate framework-8 (ZIF-8@EBTAC) was designed to monitor ALP. Due to the aggregation-induced emission of EBTAC, the synthetic ZIF-8@EBTAC shows robust fluorescence. Once pyrophosphate (ppi) was added, its complexation with Zn2+ in ZIF-8 triggered the collapse of the ZIF-8 framework, releasing encapsulated EBTAC molecules and restoring to free state, leading to the dramatical decrease in fluorescence. ALP could catalyze the hydrolysis of ppi to phosphate (pi), which is difficult to bind to Zn2+ and has little effect on the fluorescence of ZIF-8@EBTAC. Therefore, with the assistance of the substrate ppi, the ultimate fluorescence of ZIF-8@EBTAC was positively related with ALP activity. The constructed biosensor was able to monitor the ALP activity well from 0.01 to 100 U L−1, and a detection limit of 0.01 U L−1 was achieved. Based on the ability of EBTAC serving as a fluorescent probe with aggregation-induced luminescence properties, this proposed design can be applied to diverse targets and provide new ideas for the establishment of fluorescent biosensors.
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TALANTA
·
2023
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IF 6.1
Meng Zhang,Jianhong Zhang,Xin Che,Jingjing Jiang,Qin Tu,Jinyi Wang
As one of the essential trace elements in life activities, copper ion (Cu 2+ ) plays a very important role in human health. However, copper-containing pesticides are usually used for sterilization and disinfestation in agriculture. Thus, the residues of copper-containing pesticides in agricultural samples increase the risk of excessive intake of Cu 2+ for human. The development of an effective method for detecting Cu 2+ is still an important task. Herein, a detecting system based on AuNCs@ZIF-8 modified paper and smartphone platform was developed for visual detection of Cu 2+ in agricultural samples. Herein, a detecting system based on AuNCs@ZIF-8 modified paper and smartphone platform was developed for visual detection of Cu 2+ in agricultural samples. In the detecting system, gold nanoclusters (AuNCs) were packaged by ZIF-8 to limit their molecular motion and enhance the fluorescence effectively. In the meanwhile, by ultrasound-assisted biomimetic mineralizing, AuNCs@ZIF-8 composites were uniformly synthesized in situ on the surface of the paper fibers to indicate Cu 2+ by fluorescence quenching . A portable visual monitoring system consisted of the prepared Cu 2+ paper sensor and a smartphone platform was then successfully built and applied to on site detecting Cu 2+ in agricultural samples. The limit of detection (LOD) was 4.57 μM and recovery rate varied from 96.50 % to 121.58 %. The developed detecting system for Cu 2+ has the advantages of easy preparation and operation, and is very suitable for the use in agricultural products and farmland.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yingjian Ma,Yinmin Wang,Rui Zhao,Zhijie Wang,Shuang Li,Meng Yu,Sen Pang,Xinyu Guo,Yong Xu,Xuemin Wu
Using advanced functional materials and technologies to construct new, efficient, and controlled-release pesticide formulations can effectively improve the target utilization of pesticides and reduce their impact on non-target organisms and the surrounding environment. Herein, we present a strategy for preparing pH-responsive nanodrug delivery systems (Pro@MSN@ZIF-8) by loading a pesticide (prochloraz) into biocompatible mesoporous silica nanoparticles (MSNs) and using acid-unstable Metal–organic frameworks (ZIF-8) as blocking agents. The results showed that Pro@MSN@ZIF-8 was able to release Pro rapidly in acidic environments, with a cumulative release rate of 92.4% at pH= 4.5 after 72 h, which was much higher than that at pH= 7.4 (39.7%). Additionally, Pro@MSN@ZIF-8 had longer-lasting fungicidal activity than Pro-technical. Safety tests showed that Pro@MSN@ZIF-8 has a low impact on non-target organisms and the surrounding environment. The EC 50 of Pro@MSN@ZIF-8 nanoparticles for aquatic Daphnia magna was 4.128 mg/L, which was approximately 1.4 times that of Pro-technical (3.027 mg/L) at 96 h. Moreover, it was less harmful to the soil microbial community and human LO2 liver cells. Pro@MSN@ZIF-8 can provide small amounts of trace elements required by plants to promote crop growth without disturbing normal growth. Therefore, this study provides an effective strategy to improve the efficiency of pesticide use and reduce environmental hazards, which are required for cleaner, environmentally friendly, and more efficient agricultural production.
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