Nanomaterials
·
2023
·Vol. 13
·期 1
·202
·
IF 5.3
Jingyu Li,Yang Zhang,Haichao Zhao,Guoxin Sui
The excessively leached metal ions from traditional metallic antimicrobial nanoparticles are harmful to biological and human tissues. Metal-organic frameworks (MOFs) coordinating bioactive metal ions to organic bridging ligands can potentially address this issue, avoiding the excessive leaching of metal ions and simultaneously exhibiting high effective antibacterial activities. Here, we report the preparation of a 2-dimensional leaves-like zeolitic imidazolate framework (ZIF-L) for potential antibacterial and anti-algae applications. The ZIF-L nanosheet exhibits complete inactivation ofEscherichia coli(phosphate buffer saline: 4 h) andBacillus subtilis(seawater: 0.5 h). The ZIF-L/epoxy composite has excellent antibacterial effect, poisoning effect and anti-adhesion effect on a variety of marine algae. It is worth noting that the removal rate (Escherichia coli) for ZIF/epoxy composite can be reached to 90.20% by only adding ZIF-L (0.25 wt%). This work will inspire researchers to develop more metal-organic frameworks materials for applications in the antibacterial and anti-algae fields.Keywords:ZIF-L;two dimensional;antibacterial;anti-algae
研究领域:
材料科学
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生物医学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zikang Qin,Yulei Ma,Wentao Du,Jing Wei,Jia Song,Xinyue Fan,Lu Yao,Lin Yang,Yuanfa Zhuang,Wenju Jiang,Zhongde Dai
Amine-functionalized Metal-Organic Frameworks (MOFs) stand out as highly promising materials in membrane separation technology. Nevertheless, the incorporation of amine-functionalized additives may lead to uncontrollable alterations in MOF morphology. Two intact blade-like MOFs (PEI (Polyethylenimine)-ZIF-L and PAMAM (Polyamidoamine)-ZIF-L) were successfully synthesized by controlling the conditions and then introduced into Pebax 2533 to fabricate Mixed Matrix Membranes (MMMs). Hydrogen bonding and other interactions with Pebax can be formed by PEI-ZIF-L and PAMAM-ZIF-L to enhance interfacial compatibility. Simultaneously, a reversible reaction with CO 2 molecules can be undergone by the amine groups, resulting in facilitated transport in MMMs. The CO 2 separation performance of the MMMs is enhanced by this process, with the facilitation being more pronounced under humid conditions. Under humid conditions, the CO 2 permeabilities of Pebax-PEI-ZIF-L (2 wt%) and Pebax-PAMAM-ZIF-L (2 wt%) MMMs were 639.4 Barrer and 702.7 Barrer, respectively, while the CO 2 /N 2 selectivities were 26.68 and 24.35, respectively. Both permeability and selectivity exhibited a significant increase of 200% and 130%, respectively, compared to pure Pebax. Furthermore, the MMMs demonstrated excellent long-term stability during 72 h of continuous operation in a humid environment, showcasing significant potential for industrial applications, particularly in humid flue gas carbon capture.
研究领域:
膜科学
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材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Shiyang Li,Chenchen Zheng,Longdou Tu,Dajian Cai,Yangxiang Huang,Congjie Gao,Yeqiang Lu,Lixin Xue
Tight ultra-filtration (TUF) membranes were constructed by in situ growing zinc imidazole frameworks micro-crystalline leaves (ZIF-L) in polyethylene imine (PEI) and polydopamine (PDA) deposit layers on porous polyethylene (PE) substrates. The effects of preparation conditions on the surface physical and chemical structures as well as on the dye/salt separation performance of the formed TUF membranes were systematically investigated. By inserting selective water permeation channels and increasing contacting surface areas, in situ-grown ZIF-L arrays tightly cross-linked in the coating matrix greatly increased water permeation without trading off dye/salt retention selectivity. The morphology of the included ZIF-L particles could be varied by adjusting the ligand/Zn molar ratio (α) in the preparation processes. Optimized PDA-PEI/ZIF-L@PE TUF membranes containing ZIF-L of cross-cross block morphology showed very high pure water permeability of 180 ± 20 L·m −2 ·h −1 ·bar −1 (LMHB) and retention selectivity (S CR/Na2SO4 and S MB/Na2SO4 ) of 267 and 43, respectively, as well as excellent stability and anti-fouling properties.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Lei Zhang,Ziyuan Wang,Yi Jiao,Zichen Wang,Xiuming Tang,Zhanxin Du,Zeyang Zhang,Shihai Lu,Changsheng Qiao,Jiandong Cui
Recent years, biobased polymer packaging film in food packaging has witnessed great developments. However, it is still a challenge to develop biodegradable packaging films with antimicrobial property and mechanical strength. Herein, agar and polyvinyl alcohol (PVA)/Chitosan (CS) packaging films with ε-polylysine/ZIF-L nanocomposites (ε-PL@ZIF-L) were developed for the first time. Due to the incorporation of the nanocomposite, UV/visible light barrier properties (the transmittance decreased by 10.9%) of the films were improved, and the elongation at break of the composite agar films were increased by 43.0%. In the antimicrobial assays, with 4% ε-PL@ZIF-L, the inhibition zone diameters against Bacillus subtilis were 10 times as compared with the pure PVA/CS film. Furthermore, compared with commercial PE film, agar films and PVA/CS films with 4% ε-PL@ZIF-L nanocomposites could provide long-term protection for strawberry to avoid the microbial infection and prolong the shelf life of the fruit at 25 °C. The results suggested that the agar and PVA/CS packaging films with ε-PL@ZIF-L nanocomposites could significantly behave as potent antibacterial material in food packaging and preservation systems.
研究领域:
食品科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2022
·
IF 3.841
Shuang Liang,Guanting He,Guozhe Sui,Jinlong Li,Dongxuan Guo,Ze Luo,Rongping Xu,Hong Yao,Chao Wang,Zhiyong Xing
Metal organic frameworks (MOFs) are considered as desirable precursors for the preparation of photocatalyst to improve photocatalytic hydrogen evolution efficiency due to the maintained special morphology. Herein, C-doped rod-like ZnO with porous structure has been successfully prepared by using ZIF-L as precursor via an optimized two-step calcination strategy, which is applied for photocatalytic hydrogen evolution reaction from water splitting. The results show that ZnO-350-450 exhibits the best photocatalytic activity with a hydrogen production rate of 0.35 mmol·g −1 ·h −1 , which is 1.9 times higher than that of ZnO-400 (0.184 mmol·g −1 ·h −1 ) under simulated sunlight illumination. The enhanced photocatalytic performance is attributed to the fact that the two-step calcination provides the regular porous rod-like structure (ZIF-L) and the inclusion of carbon in ZnO photocatalyst. C-doped ZnO with regular morphology offers faster charge transfer rate and higher charge separation efficiency, and the C-doped expands a wider range of light absorption. Overall, the presented work could provide a new idea for designing and preparing of photocatalysts with high efficiency for photocatalytic hydrogen production.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Xingmao Zhang,Hang Wang,Ruxin Yao,Longyu Wang,Pengfei Zhao,Yiting Li,Lin Wang,Qi Wang,Qiang Lyu,Zhuangjun Fan
Designing and synthesizing membranes with fast and selective cation transport remains extremely challenging. Herein, ZGO membranes are conceived via a two-dimensional zeolitic imidazolate framework (ZIF-L) in situ grown on graphene oxide (GO), with ZIF-L as an interlayer that increases both vertical interlayer spacing and lateral tortuous path spacing of GO, thus improving the stability, selectivity, and ion permeation of the ZGO lamellar membrane. Structural analyses reveal that GO surfaces with abundant oxygen functional groups favored the formation of ZIF-L with 316 crystal planes and offered a high ion-accessible surface area. More importantly, the ZGO membrane delivers an excellent K + permeability of 86.9 mmol m −2 h −1 and K + /Mg 2+ selectivity up to 266, outperforming state-of-the-art GO-based membranes. Furthermore, molecular simulations confirm that the hydrogen bonding between hydrated cations and polar functional groups of ZGO membranes substantially restricted the dynamical transport of bivalent cation, and thus led to excellent cation selectivity. These results open a pathway to developing membranes for fast and highly selective ion separations in the future.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rongli Fang,Le Zhang,Shunjiang Huang,Ying Jin,Kaiwen Guo,Bingying Li,Yue Wang
Electrochemical treatment of saline or brackish water by capacitive deionization (CDI) is a novel resource-saving solution to ensure the availability of freshwater resources in the environment. MOF (metal–organic framework) derived carbon as a novel carbonaceous material in CDI has received considerable research attention. Among them, ZIF-L-derived carbon (ZC) suffers from problems such as self-aggregation, poor mesoporous structure, and low electrical conductivity, which lead to poor CDI performance. In this paper, a strategy of ZIF-L coated with polydopamine (PDA) is proposed to solve the above problems. When the amount of PDA was 0.5 g, ZIF-L@PDA 0.5 -derived carbon composite (ZPC 0.5 ) is obtained for efficient capacitive deionization. The ZPC 0.5 composite not only maintains the 2D leaf shaped structure consistent with ZIF-L, exposing more active sites, but also has an elevated mesopore occupancy ratio to promote solution diffusion. Meanwhile, the interaction between PDA and ZIF-L makes the ZPC 0.5 have a cavity structure, which improves the mass transfer capacity. The resulting ZPC 0.5 composite has a specific capacitance (165.8 F g −1 ) that is 3.86 times higher than that of ZC (42.9 F g −1 ). Consequently, in 1.2 V, 500 mg/L NaCl solution, the symmetric CDI cell ZPC 0.5 //ZPC 0.5 exhibits an excellent desalination capacity (29.6 mg/g), which is 2.69 times that of the ZC//ZC.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Chen Yin,Xin Ding,Zhihao Lin,Jiayong Cao,Weiye Shi,Jian Wang,Dan Xu,Donghui Xu,Yuan Liu,Guangyang Liu
Fresh strawberries are easily contaminated by microorganisms after picking. Therefore, how to effectively store and keep fresh strawberries has been a hot topic for scientists to study. In this study, we prepared a leaf shaped metal organic framework nanomaterial loaded with quercetin (Quercetin@ZIF-L) at first, which can achieve effective loading of quercetin (96%) within 45 min and has a controlled release effect under acidic conditions. In addition, by cleverly combining satellite graphene oxide @ silver nanoparticles (GO@AgNPs) with slow precipitation performance, Quercetin@ZIF-L/GO@AgNPs nanocomposite film with larger pore size and larger specific surface area was prepared by scraping method. The characterization data of water flux , retention rate, flux recovery rate and water vapor permeability show that the composite film has good physical properties. The experiment of film packaging showed that the fresh life of strawberry could be extended from 3 to 8 days, which significantly improved the storage and freshness cycle of strawberry. At the same time, the metal migration test proved that the residual amount of silver ion in strawberry met the EU standard and zinc ions are beneficial to the health, enriching the types of high-performance fresh-keeping materials and broadening the application.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Jiajun Zhong,Hao Wang,Yunpeng Liu,Lixiong Qian,Lei Yao,Xueqing Xing,Guang Mo,Zhongjun Chen,Zhonghua Wu
The leaf-like zeolite imidazolate framework (ZIF-L) with a lamellar structure is an excellent gas adsorption material. It is generally considered that the synthesis of ZIF-L must be carried out in an aqueous solution. In this study, an almost pure ZIF-L crystalline phase with nanoflake morphology was unexpectedly synthesized as the Zn2+ concentration in the methanol solution was greater than or equal to 0.36 M, and the molar ratio of Hmim to Zn2+ was fixed at 4:1. X-ray diffraction was used to characterize the crystalline structure of the product. X-ray absorption fine structure spectra were used to analyze the local atomic structure around Zn. Scanning electron microscopy was used to observe the morphology of products. Through air isolation experiments, it was found that the ambient moisture is a critical factor in determining the final product because the moisture not only penetrated the precursor solution but also participated in the synthesis of the ZIF-L phase. The as-prepared ZIF-L phase exhibits good CO2 adsorption performance. Its CO2 adsorption capacity is 1.09 for ZIF-Zn1, 1.04 for ZIF-Zn2, 1.42 for ZIF-Zn4, and 1.16 mmol/g for ZIF-Zn6 at ambient temperature and normal pressure. This study provides a moisture-assistant approach to synthesize the ZIF-L phase in a non-aqueous solution.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 26
·21337-21344
·
IF 3.289
Hong Jiang,Songlin Xue,Yefei Liu,Rizhi Chen,Weihong Xing
The Pd@ZIF-L catalysts with uniform crosshair-star shape and a size of about 20 μm were fabricated by an assembly method that enables the crystallization of ZIF-L in water with the presence of polyvinylpyrrolidone (PVP)-stabilized Pd nanoparticles (NPs). The physical and catalytic properties of the Pd@ZIF-L catalysts are greatly affected by the molar ratios of 2-methylimidazole (2-MeIM)/Zn2+ and PVP/Zn2+. Their catalytic activities were evaluated by the catalytic reduction of p-nitrophenol to p-aminophenol. The results indicate that a lower molar ratio of 2-MeIM/Zn2+ is beneficial for the increase of Pd loading and p-nitrophenol conversion, but a suitable molar ratio (≥20) of 2-MeIM/Zn2+ is helpful to the crystallization of ZIF-L and the encapsulation of the Pd NPs within the ZIF-L framework. The Pd@ZIF-L catalyst synthesized at a lower PVP/Zn2+ molar ratio has higher Pd loading and p-nitrophenol conversion due to the easy adsorption of PVP–Pd NPs onto the ZIF-L surfaces. This work would aid the development of high-performance Pd@ZIF-L catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
·
IF 3.615
Hong Jiang,Songlin Xue,Yefei Liu,Weihong Xing,Rizhi Chen
The Pd@ZIF-L catalysts with uniform crosshair-star shape and a size of about 20 μm were synthesized by an assembly method, in which a two-dimensional layered zeolitic imidazolate framework-L (ZIF-L) was used as the support to immobilize Pd nanoparticles . Their catalytic activities were evaluated by the catalytic reduction of p -nitrophenol to p -aminophenol. The results highlight that the physical-chemical and catalytic properties of the Pd@ZIF-L catalysts are greatly affected by the synthesis temperature. The temperature variation can make the catalysts transform from two-dimensional flakes to zero-dimensional spheres. High temperature is beneficial for increasing Pd loading and encapsulating Pd nanoparticles within the ZIF-L matrix. However, under the temperature larger than 30 °C, the dense dia(Zn) structures are formed. Increasing Pd loading in the Pd@ZIF-L catalysts leads to a significantly higher p -nitrophenol conversion. The relative dense structure of the as-synthesized catalysts makes p -nitrophenol access the active centers difficultly and a lower catalytic activity is observed. These findings would aid the development of high-performance Pd@ZIF-L catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhangdi Li,Mei Gou,Xuejie Yue,Qiong Tian,Dongya Yang,Fengxian Qiu,Tao Zhang
Fabrication of simple and efficient adsorbents is greatly vital to satisfy the requirements of removal of tellurium in wastewater treatment , yet remains challenging. Here, a facile and cost-effective strategy to develop ZIF-L coated self-crosslinking cellulose membrane (ZIF-L/SC membrane) for tellurium adsorption was presented. In-situ vertical growth of ZIF-L nanoplates with functional properties on membrane substrate is an available strategy, effectively remedying deficiency of pure nanosized sorbent in agglomeration problem and unhandy recovery. The SC membrane formed by strong hydrogen bonding among cellulose fibers is an excellent substrate, due to the favorable mechanical strength and abundant hydroxyl groups. The as-prepared ZIF-L/SC membrane shows advantageous morphology of large contact surface, fine thermal stability and eligible mechanical strength. The adsorption performance and possible mechanism of ZIF-L/SC membrane for Te (IV) were investigated by diverse characterization methods, showing admirable adsorption effect. Furthermore, the ZIF-L/SC membrane has excellent antibacterial properties, thus it is expected to deal with membrane fouling caused by microorganism breeding. Therefore, the bifunctional ZIF-L/SC membrane with excellent antibacterial activity is anticipated to be a promising candidate for efficient tellurium adsorbents, and simultaneously have potential in various fields in the future.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）