JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Xinling Zhang,Ning Yuan,Shuo Xu,Yi Li,Qibao Wang
The removal of organic pollutants was examined by new zeolitic imidazolate framework-8/carboxyl-functionalized multi-walled carbon nanotubes (ZIF-8/MWCNTs-COOH) nanoadsorbents, which were prepared via controlling the reaction sequence of MWCNTs-COOH with the precursors of ZIF-8. Structural morphology and chemical composition characterizations confirmed the successful preparation of ZIF-8/MWCNTs-COOH nanoadsorbents. The obtained samples manifested a preferable adsorption capacity for Congo red with the maximum adsorption capacity of 1185.58 mg g −1 with an adsorption removal rate of 97.93% at equilibrium adsorption. Further analyses indicated that the adsorption process conformed to the pseudo-second-order kinetic model and Langmuir adsorption isotherm. The thermodynamic analyses were depicted as endothermic, entropy-increasing, and spontaneous. The effects of pH value, interfering ions, and dosage on the adsorption properties were systematically explored. The nanoadsorbent can be expediently reused for eight cycles without a prominent reduction in adsorption activity. The improved performance and high reusability can be ascribed to the increasing specific surface, the presence of electrostatic interaction, hydrogen bonding, and π–π interaction between ZIF-8/MWCNTs-COOH and organic molecules. In addition, the prepared composites also showed a better adsorption performance for tetracycline with the equilibrium adsorption capacity of 471.22 mg g −1 compared to pure ZIF-8 and MWCNTs-COOH.
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CHEMOSPHERE
·
2022
·
IF 8.943
Bohan Yuan,Jiachao Yao,Zeyu Wang,Luyao Dai,Min Zhao,Dzmitry Hrynsphan,Savitskaya Tatsiana,Jun Chen
In this work, Rhodococcus ruber HJM-8 and Paracoccus communis YBH-X were isolated and used to enhance N , N -dimethylacetamide (DMAC) degradation and mineralization efficiencies. The monoculture and co-culture of the two strains for DMAC degradation were compared; results indicated that, a degradation efficiency of 97.62% was obtained in co-culture, which was much higher than that of monocultures of HJM-8 (57.34%) and YBH-X (34.02%). The degradation mechanism showed that co-culture could efficiently improve extracellular polymeric substances production, electron transfer , and microbial activity . Meanwhile, the mineralization mechanism suggested that acetate was the dominant intermediate which had an inhibitory effect on HJM-8, and co-culture was conducive to mineralization due to the high performance of acetate conversion and Na + K + -ATPase vitality. Besides, a pathway of DMAC biodegradation was proposed for co-culture: DMAC was degraded into acetate by HJM-8, then the accumulated acetate was mineralized by YBH-X. Additionally, the co-culture system was further optimized by Box-Behnken design.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Jian Liu,Yingbi Chen,Yuting Hu,Yiting Zhang,Gengwei Zhang,Shixing Wang,Libo Zhang
A metal-organic framework (ZnO@ZIF-8) with great adsorption potential was developed using ZnO nanoparticles as a surface-active center and applied to lead removal from wastewater. The adsorption experiments were carried out and the related adsorption behaviors were investigated. The adsorbent shows excellent adsorption performance between pH 3–5. The maximum adsorption capacity of ZnO@ZIF-8 for Pb (II) was 689.36 mg/g at 303 K. The adsorptive process of Pb (II) onto ZnO@ZIF-8 conforms to the Langmuir isotherm and pseudo-second-order kinetic models. Thermodynamics illustrate that the adsorption process is chemical adsorption on a uniform surface. Selectivity experiments showed that ZnO@ZIF-8 had the strongest affinity with Pb (II). The adsorption-desorption cycle confirmed that ZnO@ZIF-8 was a reliable and recyclable adsorbent. XPS, Zeta potential and FT-IR analysis illustrate that the adsorption of Pb (II) by ZnO@ZIF-8 was concentrated in electrostatic adsorption and chelation. DFT calculation indicated that there are different types of Pb (II) combination mode (Pb-N and Pb-O) and the adsorption mainly depended on the chelation. This study presented herein played important roles in the governance of heavy metal waste-water pollution as a result of ZnO@ZIF-8 can effective selectivity cleanup of Pb (II).
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Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 31
·5925-5937
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IF 7.571
Jie Sheng,Ziyue Zu,Yugang Zhang,Haitao Zhu,Jianchen Qi,Tao Zheng,Ying Tian,Longjiang Zhang
Atherosclerosis (AS) is a condition associated with dysfunctional lipid metabolism and an inflammatory immune microenvironment that remains the leading cause of severe cardiovascular events. Drugs exhibiting both anti-inflammatory and lipid-scavenging activity hold great promise for treating AS. In this study, zeolitic imidazolate framework-8 (ZIF-8) nanoparticles loaded with losartan potassium (LP) were developed as an anti-AS treatment to target both of these therapeutic arms simultaneously. LP@ZIF-8 accumulated within AS target tissues via the enhanced permeability and retention (EPR) effect, as confirmed via in vivo near-infrared fluorescence (NIRF) imaging and was disrupted in response to the low pH. ZIF-8 could activate autophagy, thus regulating lipid metabolism and restoring cholesterol homeostasis as previously reported, while the released LP served as an anti-inflammatory angiotensin receptor blocker (ARB) inhibitor, which was confirmed via the in vivo treatment studies. As such, our data highlight LP@ZIF-8 as a promising therapeutic agent capable of attenuating the severity of AS.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yaqi Zhang,Yaming Sun,Yong Man,Hang Yuan,Renyong Zhao,Guoqiang Xiang,Xiuming Jiang,Lijun He,Shusheng Zhang
The development of peroxymonosulfate (PMS) catalysts with sufficient active sites and high mass transfer capacity is a desirable but challenging aspect in advanced oxidation processes. In this work, an Fe/N-co-doped porous carbon (Fe/N-PC) material derived from silica-coated Fe-doped zeolitic imidazolate framework-8 (Fe-ZIF-8) was developed and used as catalyst for the degradation of aflatoxin B 1 (AFB 1 ). Fe-ZIF-8 introduced additional Fe-N sites with high catalytic PMS activity. Importantly, the strategy of silica coating on the surface of Fe-ZIF-8 effectively prevented the aggregation of catalyst particles during the pyrolysis process and introduced a hierarchical porous structure in Fe/N-PC, significantly improving the mass transfer of reactants on the catalyst. As a result, Fe/N-PC possessed a much higher adsorption capacity for AFB 1 (202.8 mg g −1 ) than other reported carbon adsorbents and exhibited fast degradation of AFB 1 with ultra-high removal efficiency (99.88%) within 30 min. Singlet oxygen ( 1 O 2 ) was proved to be the dominant reactive species for AFB 1 degradation. In addition, four degradation products were identified, and two possible degradation pathways were proposed. The double bond of the terminal furan ring or the methoxy group was destroyed, which implied that the toxicity of the degradation products was significantly reduced. Based on the above results, Fe/N-PC can be considered an efficient catalyst for the removal of hard-to-degrade AFB 1 in practical applications.
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Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 5
·765-778
·
IF 7.571
Maolei Sun,Yun Liu,Kun Jiao,Wenyuan Jia,Kongzhao Jiang,Zhiqiang Cheng,Guomin Liu,Yungang Luo
Guided tissue regeneration (GTR) strategies are an effective approach to repair periodontal defects by using GTR membranes. However, commercial GTR membranes still have limitations in periodontal tissue regeneration owing to lack of antibacterial and osteogenic properties. The development of novel Janus nanofibers with biphasic release characteristics based on the therapeutic needs of GTR is essential to tackle this issue. Here, we developed a multifunctional Janus nanofiber via uniaxial electrospinning, with zeolitic imidazolate framework-8 nanoparticle (ZIF-8 NP) loading in the hydrophilic polyvinylpyrrolidone (PVP) part and FK506 embedding in the hydrophobic polycaprolactone (PCL) part. The release of Zn2+ conformed to the Ritger–Peppas kinetics which could effectively prevent bacterial infection, and the release profile of FK506 was fitted to a first-order equation which could provide persistent osteogenic stimulation for osteogenesis. The periodontal tissue regeneration data from a rat periodontitis model revealed that the multifunctional electrospun Janus nanofibers could be used as an effective bioplatform to restore alveolar bone impairment, compared with the control group. In summary, the Janus nanofibers with biphasic release characteristics quickly exert antibacterial function as well as continuously provide a microenvironment beneficial to the osteogenesis process, demonstrating its great potential for GTR treatment in dental clinic applications.
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Defence Technology
·
2022
·
IF 4.035
Shi-bin Lu,Ying Meng,Hai-bo Wang,Xian-wei Jiang,Jin Yang,Ning Wei,Lin Jin,Li-juan Wan,Hao Tang,Qian-qian Hou
A porous 3D cross-linked conductive network pierced by multi-wall carbon nanotubes (MWCNTs) was successfully designed from zeolitic imidazolate framework-8 (ZIF-8). Zn@NPC@MWCNTs composites were tailored by the facile regulating the mass ratios and thermal annealing treatment. Due to the combination of less eddy current loss and dielectric loss together with multiple reflection attenuation caused by a unique structure. With a 10 wt% filler loading, the Zn@NPC@MWCNTs composites carbonized at 800 °C show two high reflection loss ( RL ) values with different thicknesses. An RL value is −53.18 dB with 4.09 mm thickness in the C-Band (4–8 GHz), and a minimum RL can reach −74.83 dB (10.8 GHz) with a matching thickness of 2.749 mm. The effective absorption bandwidth is 4 GHz (from 8 to 12 GHz, RL ≤ −10 dB), which just covers the full X-band. Low cost and easy preparation can also provide advantages to develop MOF-based materials as effective EMW absorbents.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Dongzhi Zhang,Zhanjia Kang,Xiaohua Liu,Jingyu Guo,Yan Yang
This paper demonstrates a QCM ammonia gas sensor based on PSS-doped ZIF-8-derived porous carbon and polyaniline decorated nanocomposite (PSS/ZIF-C/PANI). The PSS/ZIF-C/PANI composite was successfully prepared by MOFs template-carbonization and in-situ polymerization. The morphology and structure composition of the prepared samples were completely tested by various material characterization methods. The ammonia sensing properties of PSS/ZIF-C/PANI coated QCM sensor at room temperature were systematically studied. Experimental results show that the sensor possesses quite sensitivity (5.67 Hz/ppm), excellent linearity, high response/recovery capability (28 s/17 s) and selectivity towards ammonia. Meanwhile, the electrical parameters and quality factor of QCM were verified by impedance analysis. Furthermore, the potential ammonia adsorption mechanism can be mainly related to the synergistic effect of composite nanomaterials . This work confirms that the PSS/ZIF-C/PANI composite provides a new avenue for QCM ammonia sensing, and the sensor is expected to become a potential candidate for ammonia detection.
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-12
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IF 5.7
Gao Lidi,Cui Hongshou,Guo Xinyu,Dong Qing,You Xingyu,Guo Xinshu,Qin Shili,Jia Lihua
A zeolitic imidazolate framework (ZIF)-8-silica hybrid monolithic column was prepared by one-step sol–gel method. The stationary phase in the monolithic column was characterized by Fourier-transform infrared spectra, X-ray diffraction, thermogravimetric analysis, nitrogen adsorption/desorption, and zeta potential. The results showed that ZIF-8-silica hybrid monolithic materials had abundant functional groups, good crystallinity, large specific surface area, and good thermal stability. A capillary electrochromatography (CEC) chiral separation system was for the first time constructed with ZIF-8-silica hybrid monolithic column and sulfobutylether-β-cyclodextrin (SBE-β-CD) as a chiral additive and was applied to separate the selected single and mixed chiral compounds (13 natural amino acids and 5 chiral pesticides). Under the optimized CEC conditions, all the single analytes achieved baseline separation with resolution of 2.14–5.94 and selectivity factor of 1.06–1.49 in less than 6 min, and the mixed amino acids with similar properties were also simultaneously enantioseparated (Rs ≥ 1.82). Relative standard deviations (RSDs) of migration time and column efficiency were lower than 4.26% and did not change significantly after 200 runs, evidencing excellent reproducibility and stability. These results demonstrate that the application of SBE-β-CD as a chiral additive for ZIF-8-silica hybrid monolithic columns is a promising method for the separation of chiral compounds. Graphical Abstract
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2023
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IF 5
Safdar Ali Amur,Najaf Ali Soomro,Quratulain Khuhro,Yun Wei,Hao Liang,Qeping Yuan
In the present study, multifunctional natural drug gentiopicroside (GPS) has been encapsulated into zeolitic imidazolate frameworks (ZIF-8) in aqueous solution at room temperature. ZIF-8 MOFs were observed to be suitable and favorable carrier for delivery of GPS. The single step synthesis of GPS@ZIF-8 reflected high loading efficacy of GPS into ZIF-8 of about 84%, while, its loading capacity was revealed to be 10.77%. GPS@ZIF-8 and ZIF-8 were characterized through different techniques. Morphology of GPS@ZIF-8, assessed through SEM and TEM , revealed to be uniform and hexagonal shape which is much alike to pure ZIF-8. Moreover, average particle size of ZIF-8 and GPS loaded into ZIF-8, as observed through DLS, was 125 nm and 149 nm, respectively; increased size of GPS@ZIF-8 depicted a well efficient encapsulation of GPS. The thermal stability showed that the GPS when loaded into ZIF-8 remained thermally constant up to 298 °C. The free drug GPS release profile from GPS@ZIF-8 was studied at 37 °C in PBS solution with two pH i.e. 5.0 and 7.4. The GPS@ZIF-8 reflected significant faster release of GPS in acidic medium i.e. 81.31% which was higher than the release of GPS in physiological medium i.e. 20.03%. Thus, results of the present study revealed that the ZIF-8 can be used as a potential carrier for controlled delivery of GPS against diseased cells in future. GPS@ZIF-8 in contrast to free GPS showed highest inhibition zone against gram-negative and gram-positive bacteria. Therefore, the composite material can be potentially considered for the therapeutic applications.
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APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Hefu Li,Dan Meng,Peng Qi,Jun Sun,Hongfei Li,Xiaoyu Gu,Sheng Zhang
Aluminum hypophosphite (AHP) is an effective flame retardant to thermoplastic polyurethane (TPU), but it also results in increase on smoke release caused by the presence of phosphorus groups. In this work, a novel synergistic flame retardant was fabricated from metal organic framework (ZIF-8) and sepiolite (SEP). For the compsosite of TPU/8.0AHP/1.0ZIF-8@SEP, limiting oxygen index (LOI) reached 27.5% and it satisfied the UL-94 V-0 grade. The heat release rate and the total heat release decreased by 78.9% and 39.1% compared with the control TPU respectively. The increased smoke production caused by AHP was partly adsorbed by ZIF-8@SEP, therefore, the sample of TPU/8.0AHP/1.0ZIF-8@SEP showed the lowest smoke release in cone calorimeter test. Unsimilar as other flame retardant, the using of 8.0AHP/1.0 ZIF-8@SEP just brought less than 2.0% loss on tensile strength and 7.8% drop on the elongation at break of TPU. Consequently, the ZIF-8@SEP was documented as excellent synergistic flame retardant for TPU and it brought limited damage on mechanical performance.
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CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Yihan Wu,Biyun Li,Xiangxue Wang,Shujun Yu,Hongwei Pang,Yue Liu,Xiaoyan Liu,Xiangke Wang
The water stable core-shell microspheres (Fe 3 O 4 @ZIF-8) with strong magnetism were successfully fabricated through a facile modification strategy. Concrete procedures included firstly pretreatment of Fe 3 O 4 core with anionic polyelectrolyte to acquire negatively charged Fe 3 O 4 particle surface, followed by nucleation through attracting Zn 2+ cation, and then growth of a thin layer of ZIF-8 (~25 nm). Various characterization techniques (SEM, TEM, FT-IR, XRD, VSM, BET and XPS) indicated that the Fe 3 O 4 @ZIF-8 microspheres were highly stable and magnetic with a large specific surface area (606.91 m 2 /g) and fairly sufficient functional groups ( NH , OH, COOH, Zn O, N O and C N ). Multi-factors affecting the radionuclides removal performance on Fe 3 O 4 @ZIF-8 was adequately explored, comprising contact time, temperature, pH, ionic strength, co-existing ions and extreme conditions. And the results showed that Fe 3 O 4 @ZIF-8 exhibited fast reaction kinetics (~30 min to achieve equilibrium), excellent uptake capabilities (539.7 mg U/g and 255.6 mg Eu/g), remarkable selectivity and favorable physicochemical stability. These researches suggested that Fe 3 O 4 @ZIF-8 could not only simultaneously achieve favorable stability and functionality, but also easily to be separated by external magnetic field after used in radioactive sewage treatment, which was of considerable practical utility in extracting radioactive wastes though in harsh circumstance.
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危险品化学品经营许可证（带存储）