JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Huijie Zheng,Yawei Chen,Jiajia Yang,Peiyan Hao,Lijun Ren,Huiyun Zhou
A hierarchically porous ZIF-8 (HZIF-8) with pH-responsive and antibacterial activity was constructed using bicomponent hydrogel as template. The synthesized HZIF-8 was applied to load the antibacterial drug berberine hydrochloride (BBH). In vitro release studies showed that [email protected] and [email protected] displayed a sustained drug release profile, and the drug release rate increased with the decreasing pH value. The [email protected] with the highest drug loading capacity also had the highest cumulative drug release rate. At the end of 24 h, the cumulative release of BBH encapsulated in HZIFS, HZIFM and HZIFP were 92.07%, 86.60% and 88.00% at pH 5.0, respectively, higher than that of ZIF-8 (84.07%). Furthermore, in vitro antibacterial testing revealed that [email protected] exhibited efficient and long-lasting effects against Staphylococcus aureus , which was attributed to the synergistic bacteriostatic effect of Zn 2+ and BBH released by the structural degradation of [email protected] under acidic conditions. In conclusion, the study provides a strategy for synthesizing HZIF-8 and demonstrates the potential of HZIF-8 as a pH-responsive nanoplatforms for antibacterial applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 48
·23112-23118
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IF 3.925
Xiaoxun Liu,Jilin Zhang,Yunyun Lei,Zi Dai,Xiaoya Zhao,Guixia Liu
Metal–organic framework (MOF) materials have great potential for solving dye contamination problems due to their excellent organic dye adsorption properties. However, MOF adsorbents present a tremendous drawback of poor separability. Herein, core–shell Fe3O4@ZIF-8-PSS with abundant active sites and sensitive magnetic responses was synthesized in one step via simultaneously introducing imidazole ligands and poly(sodium-4-styrenesulfonate) (PSS) modifiers into the dispersion of Fe3O4 microspheres. These magnetic Fe3O4@ZIF-8-PSS microspheres can be magnetically separated and recovered in only 10 seconds. Moreover, the addition of PSS increases the active sites of Fe3O4@ZIF-8-PSS, which is more favorable for the adsorption of organic dyes. The maximum adsorption capacity for crystal violet (CV) can reach 382 mg g−1. The adsorption process was consistent with the Langmuir isotherm and pseudo-second-order kinetic models. The adsorption mechanism of Fe3O4@ZIF-8-PSS for CV is mainly attributed to electrostatic interactions and π–π interactions. The effects of solution pH and coexisting ions on the adsorption capacity were adequately discussed. These studies suggest that Fe3O4@ZIF-8-PSS not only has efficient adsorption properties but can also be easily separated by external magnetic fields after being used for organic dye wastewater treatment, which may endow it with considerable potential for wastewater treatment.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 6
·1349-1355
·
IF 2.726
Xiao Meng,Qi Wenqian,Jia Shuanghui,Pang Mengting,Shi Fengcheng,Mao Hui
Significant concerns have been raised over the removal of antibiotics, such as tetracyclines(TC) in aquatic environments. Herein, we synthesized a new type of heterogeneous catalyst by supporting Fe 0 nanopartciles(FeNPs) onto carbon coated ZIF-8 (C@ZIF-8). The carbon layer formed by glucose was beneficial to maintain the morphology and porous structure of ZIF-8, which can also appropriately improve the hydrophobicity of ZIF-8 for enriching the TC. The as-prepared FeNPs-C@ZIF-8 catalyst featured an extreme large specific surface area(1122.16 m 2 /g), and the supported FeNPs with an average diameter of 6.13 nm exhibited a high dispersity on the supporting matrix of C@ZIF-8. For the removal of tetracycline, the large specific surface area of FeNPs-C@ZIF-8 allowed for an easy access of tetracycline to the FeNPs, while the highly dispersed FeNPs served as actived sites for the efficient degradation of tetracycline. A synergistic effect between adsorption and catalytic degradation of FeNPs(5%, mass fraction)-C@ZIF-8 was proven to be responsible for the high-performance removal of tetracycline with the removal efficiency high up to 93.02% at pH 5, 25 °C. The FeNPs-C@ZIF-8 was capable of recycling after activation with supplementary Fe 0 , which still maintained a high removal efficiency of 75.52% in the 5th cycle within 20 min.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Hao Yu,Minghao Dou,Shuang Wang,Yuye Cheng,Zhiqiang Li,Hongyu Shao,Mengjie Yao,Xinrui Wang,Yanyan Chen,Shenjie Li
Although quantum dots (QDs) have unique properties that are different from conventional semiconductors, their photocatalytic activity and stability are far from expectations, and the preparation of semiconductor composites has become an important means to improve their photocatalytic hydrogen production performance. A convenient and safe coordination-assisted self-assembly method was used to encapsulate QDs into metal–organic frameworks and further formed AgInS2@ZIF-8/ZnS nanostructures by converting part of ZIF-8 into ZnS composite materials, which enhanced their photocatalytic hydrogen production performance and cycling stability. The results show that AgInS2@ZIF-8/ZnS nanocomposites have the highest photocatalytic activity (the average hydrogen production reaches 9.79 mmol·g–1·h–1; λ > 420 nm) after 6 h of sulfurization, which is far greater than that of AgInS2 QDs. Compared with the AgInS2@ZIF-8 composite, their performance is improved by nearly 10 times. In conclusion, a simple, safe, and easily-controllable method is used to prepare a novel and efficient photocatalytic material, which provides a new idea about the rational design of novel QD photocatalytic composites.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Tianlin Yao,Gaoqiu Dong,Shiyu Qian,Yu Cui,Xiang Chen,Tingting Tan,Lingling Li
Accurate quantitative detection of biomarkers in complex samples is of remarkable significance for clinical diagnosis and follow-up therapy, which remains challenging due to the severe interference from sample matrix . Herein, a background-free sensing platform toward ultrasensitive dopamine (DA) detection is developed based on a multifunctional nanohybrid by integrating ultrasmall Cr 3+ -doped zinc gallate (ZnGa 2 O 4 :Cr 3+ , ZGC) persistent luminescence nanoparticles (PLNPs) with hierarchical porous zeolite imidazole framework-8 (HZIF-8). The ZGC PLNPs decorated on the surface of HZIF-8 have long-lasting near-infrared emission and act as signal element, whereas the hierarchically porous HZIF-8 scaffold can serve as an analyte concentrator to enrich DA around ZGC PLNPs. Furthermore, the oxidative polymerization of enriched DA is favored in the alkaline microenvironment provided by 2-methylimidazole in HZIF-8, producing polydopamine (PDA) which finally quenches the luminescence of ZGC/HZIF-8 via photoinduced electron transfer (PET) mechanism. Under the optimized conditions, the proposed nanoplatform exhibits excellent sensitivity and selectivity for the determination of DA in the range of 0.0025–75 μM with a limit of detection down to 0.0010 μM. Benefiting from the superior excitation-free persistent luminescence, this platform also shows satisfactory feasibility in quantitative determination of DA in human serum samples. This new strategy can contribute to the development of PLNPs-based biosensors for practical application in clinical analysis.
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JOURNAL OF CHEMICAL SCIENCES
·
2022
·Vol. 134
·期 2
·1-9
·
IF 2.15
Hu Lihua,Chen Chen,Wang Xiao,Hu Kairan,Xu Zhihao,Xu Wei
A high-efficiency adsorbent ZIF-8 was successfully prepared in a microemulsion system provided by an ionic liquid, which showed excellent potential for removing phosphate from water. The properties of the adsorbents were determined by several characterization methods, such as X-ray diffraction (XRD), infrared spectroscopy (FTIR) and Brunauere-Emmette-Teller (BET) et al. The results confirmed that ZIF-8 prepared in the ionic liquid microemulsion (ZIF-8-ILM) has a smaller particle size compared with that prepared in an aqueous solution. Moreover, the ZIF-8-ILM holds a high BET specific surface area and pore volume, as well as the textural meso- and macro-porosities formed by inter-particle voids. Based on these traits, the ZIF-8-ILM exhibit excellent adsorption capacity for phosphate, as evidenced by a maximum adsorption capacity of 178.99 mg/g was obtained. In addition, the capture of phosphate on ZIF-8-ILM was quite quickly and reached equilibrium within 60 min. Graphical abstract A high-efficiency adsorbent ZIF-8 was successfully prepared in a microemulsion system provided by an ionic liquid. The ZIF-8 materials prepared not only had high BET specific surface area and pore volume but also exhibited hierarchical pore structure, which showed excellent potential for removing phosphate from water.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chenyang Wang,Jihui Wang,Wenbin Hu
ZnO@ZIF-8 films were prepared on Q235 steel surface through solvothermal reaction by pre-electrodepositing ZnO films and modified with stearic acid (SA). The surface morphology , elements content, crystal structure and chemical structure of films were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The wettability of films was measured by water contact angle meter. The corrosion behavior of films was tested by Electrochemical tests. ZnO films show hexagonal nanotubular morphology, having the best compactness and corrosion resistance at deposition current density of 2.3 mA/cm 2 with the protection efficiency of 90.11%. After solvothermal reaction, ZIF-8 grains are formed and clad ZnO nanotubes , forming a contact film to prevent corrosive ions attacking steel efficiently. ZnO@ZIF-8 films have the best compactness and corrosion resistance at Zn 2+ concentration of 0.06 mol/L with the protection efficiency of 99.83%. But the corrosion resistance of ZnO@ZIF-8 film declines quickly for the water molecules can get inside the film and destroy the bond between ZIF-8 grains. Thus, SA was grafted to ZnO@ZIF-8 film to enhance its hydrophobicity . After SA modification, the protection efficiency reaches 99.99% and maintains at 95.29% after 14 days immersion in the solution of 3.5 wt.% NaCl .
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高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 21
·2109865
·
IF 32.086
Mei Yang,Wenjin Xu,Zhongxing Chen,Ming Chen,Xiaoyu Zhang,Huanhuan He,Yushan Wu,Xueyang Chen,Tianjiao Zhang,Mengdi Yan,Jieyi Bai,Colm McAlinden,Keith M. Meek,Jinjin Yu,Shengnan Ding,Rongrong Gao,Jinhai Huang,Xingtao Zhou
Riboflavin-5-phosphate (RF) is the most commonly used photosensitizer in corneal cross-linking (CXL), but its hydrophilicity and negative charge limit its penetration through the corneal epithelium into the stroma. To enhance the corneal permeability of RF and promote its efficacy in the treatment of keratoconus, novel hibiscus-like RF@ZIF-8 microsphere composites [6RF@ZIF-8 NF (nanoflake)] are prepared using ZIF-8 nanomaterials as carriers, which are characterized by their hydrophobicity, positive potential, biocompatibility, high loading capacities, and large surface areas. Both hematoxylin and eosin endothelial staining and TUNEL assays demonstrate excellent biocompatibility of 6RF@ZIF-8 NF. In in vivo studies, the 6RF@ZIF-8 NF displayed excellent corneal permeation, and outstanding transepithelial CXL (TE-CXL) efficacy, slightly better than the conventional CXL protocol. Furthermore, the special hibiscus-like structures of 6RF@ZIF-8 NF meant that it has better TE-CXL efficacy than that of 6RF@ZIF-8 NP (nanoparticles) due to the larger contact area with the epithelium and the shorter RF release passage. These results suggest that the 6RF@ZIF-8 NF are promising for transepithelial corneal cross-linking, avoiding the need for epithelial debridement.
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PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 16
·10005-10013
·
IF 4.036
Xiaofeng Meng,Jingwei Guan,Shanshan Lai,Liming Fang,Jianyu Su
Antimicrobial photodynamic therapy (aPDT) is a highly attractive therapy due to its advantages of being a non-antibiotic procedure for reducing drug-resistant microbes. Curcumin (CCM) has been considered as a natural photosensitizer for PDT with prominent antibacterial, antifungal, and anti-proliferative activity. However, its excellent biological and pharmacological activities are limited because of its low solubility, rapid metabolization and instability. Herein, we reported a promising agent based on CCM-incorporated into zeolitic imidazolate framework-8 (ZIF@CCM). The as-prepared nanoparticle exhibited high drug loading capability (11.57%) and drug loading encapsulation (82.76%). Additionally, ZIF@CCM displayed a pH-responsive drug release behavior and chemophotodynamic therapy for excellent antibacterial activity. The underlying mechanism elucidated that Zn2+ released from ZIF-8 increased the permeability of the bacterial cell membrane with leakages of K+. The overproduction of extracellular ROS further resulted in the disrupted bacterial cell membrane and distorted bacterial morphology. Thus, ZIF@CCM-mediated photodynamic activation might be a promising treatment strategy for microbial inactivation.
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PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2022
·
IF 3.191
Guo-Ying Chen,Xi Zhou,Tao Tian,Chun-Yan Zhang,Shi-Jun Yin,Hua Chen,Yi Xu,Feng-Qing Yang
A simple and time-saving colorimetric method was developed to quantify sulfonamides (SAAs) in milk via inhibition of the human carbonic anhydrase II (hCAII)-like activity of ZIF-8 that can hydrolyze p -nitrophenyl acetate ( p NPA) to p -nitrophenol ( p NP), following the color change from yellow to colorless. Effects of different reaction conditions, including pH, temperature, amount of ZIF-8, and incubation time , were investigated. The value of Michaelis-Menten constant ( K m ) is measured to be 0.15 mM, which exhibits high affinity to p NPA. The IC 50 (0.17, 0.24, and 0.60 mM) and inhibition constant ( K i ) (0.09, 0.13, and 0.33 mM) of sulfamethazine (SD), sulfadimethoxine (SDM), and sulfathiazole (ST) on ZIF-8 were measured, respectively. Moreover, the activity of ZIF-8 remains more than 90.0% of its initial activity after 30 days’ storage. The colorimetric method for SD, SDM, and ST determination was established at the linear ranges of 6.3–750.0 μM (1.75–208.75 mg/kg), 6.3–750.0 μM (1.96–232.75 mg/kg), and 5.0–1250.0 μM (1.28–319.15 mg/kg) with limit of detection of 4.3, 3.2, and 3.9 μΜ (1.2, 0.99, and 0.96 mg/kg), respectively. In addition, the spiked recoveries of SAAs in milk sample are in the range of 81.6%–106.7% with RSD less than 6.5%. In short, the developed colorimetric method can achieve rapid analysis of SAAs in milk with simple operations.
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PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Yang Mingke,Wang Huishan,Zuo Julian Y.,Deng Chun,Liu Bei,Chai Liya,Li Kun,Xiao Han,Xiao Peng,Wang Xiaohui,Chen Wan,Peng Xiaowan,Han Yu,Huang Zixuan,Dong Baocan,Sun Changyu,Chen Guangjin
n-butane and isobutane are important petrochemical raw materials. Their separation is challenging because of their similar properties, including boiling point. Here, we report a zeolitic imidazolate framework-8 (ZIF-8)/N,N-Dimethylpropyleneurea (DMPU)-water slurry as sorption material to separate butane mixtures. The isobutane/n-butane selectivity of ZIF-8/DMPU-water slurries is as high as 890 with high kinetic performance, which transcends the upper limit of various separation materials or membranes reported in the literature. More encouragingly, a continuous pilot separation device was established, and the test results show that the purity and recovery ratio of isobutane product are 99.46 mol% and 87%, respectively, which are superior to the corresponding performance (98.56 mol% and 54%) of the industrial distillation tower. To the best of our knowledge, the use of metal-organic frameworks (MOFs) for gas separation in pilot scale remains underexplored, and thus this work provides a step forward to the commercial application of MOFs in gas separation.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 47
·2208064
·
IF 19.924
Jianyu Wang,Yan Wang,Yutao Liu,Hong Wu,Mingang Zhao,Yanxiong Ren,Yunchuan Pu,Wenping Li,Shaoyu Wang,Shuqing Song,Xu Liang,Guangwei He,You Han,Zhongyi Jiang
Metal–organic frameworks (MOFs) are one of the most promising membrane materials for olefin/paraffin separations. However, most of MOF membranes have a thickness over 1 µm, which greatly compromises the permeation flux. While previous studies are focused on increasing crystal nucleus density on the substrates, achieving ultrathin membrane via modulation of the crystal growth is lacking. Herein, an inhibited Ostwald ripening (IOR) strategy is proposed to fabricate ultrathin ZIF-8 membranes, through incorporating polymer-based inhibitors into the membrane formula to inhibit the growth process of ZIF-8 crystals via the metal–organic coordination. The IOR process can be readily tuned by varying the functional groups, molecular weights, and concentrations of the inhibitors, enabling a facile control over the IOR degree and thus the membrane thickness. Consequently, the thickness of ZIF-8 membranes can be dramatically reduced to 180 nm. The resulting membranes exhibit ultrahigh C 3 H 6 /C 3 H 8 separation performance with C 3 H 6 permeance of 386 GPU and C 3 H 6 /C 3 H 8 separation factor of 120. It is anticipated that this straightforward and efficient IOR strategy can open a new avenue for the fabrication of ultrathin MOF membranes to tackle many critical molecular separations.
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