MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Yang Yu,Rong Zhang,Lurong Hao,Yanni Li,Baoling Wang,Dandan Ge
In this work, a new type of magnetic ZIF-8 based on ferrofluids (FFs) and supramolecular solvents (SUPRASs) was prepared and applied as an extraction phase in vortex-assisted liquid–liquid microextraction of cationic dyes (chrysoidin, auramine O and rhodamine B) in beverage and river water samples. The FFs comprised sodium dodecyl sulfate (SDS) - coupled titanium dioxide - coated MZIF-8 and hexafluorobutanol-geraniol SUPRAS (MZIF-8/SDS-TiO 2 @HFB-Ger). The prepared extraction phase exhibited high extraction recoveries of these cationic dyes owing to strong interaction mechanisms, including hydrogen-bonding, hydrophobic, π-π and electrostatic attractions, between the FFs and the analytes. The optimum extraction conditions of cationic dyes were as follows: Ger content was 4 %, HFB content was 6 %, MZIF-8/TiO 2 -SDS was 25 mg, vortex time was 3 min, solution pH was 6–8, salt concentration was 5 % (m/v), elution solvent was ethanol and elution solvent volume was 500 μL. Under the optimized conditions, cationic dyes were linear in 5–1000 ng mL −1 with determination coefficients higher than 0.9957. The limits of detection ranged from 1 to 1.5 ng mL −1 , and the limits of quantification were between 3.5 and 5 ng mL −1 . Finally, the developed method was applied to determine the target analytes in beverage and river water samples, achieving extraction recoveries ranging from 93.1 % to 104.3 %, with relative standard deviations between 1.1 % and 8.1 %. Compared with MZIF - 8, MZIF-8/SDS - TiO 2 @HFB - Ger exhibited higher extraction efficiency for cationic dyes. Therefore, the developed method has great potential in extracting various analytes from various food and water samples.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Kun Xu,Yiyang Bi,Yuyu Wei,Xin Li,Yu tian Liu,Yi ting Lin,Cheng qian Wang,Guang xu Hu,Qun Liu,Yu Zhang
A compressible ZIF-67/polyacrylamide/chitosan composite aerogel (named as ZIF-67/PAM/CSA) is prepared by two-step method with in-situ polymerization and growth, which exhibits excellent compressible property and efficient adsorption performance of tetracycline. The loading capacity of ZIF-67 in ZIF-67/PAM/CSA can reach 42.7%, making the increased specific surface area up to 491.95 m 2 g −1 for composite aerogel. For tetracycline adsorption, ZIF-67/PAM/CSA presents high capacity of 260.09 mg g −1 as well as stable enough recycling availability. The composite aerogel synthesized here with high specific surface area and compressibility, offers a promising method to branch out compressible adsorbents with benefits for the adsorption regeneration process in pollutant treatment applications.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Xiangyang Liu,Longhui Fang,Jin Wang,Sihan Huang,An Li,Hui Liu,Zhuoyang Lu,Jiangang Long,Maogang He
R410A is a high GWP (2088) refrigerant blend soon to be eliminated, consisting of equal mass of difluoromethane (R32) and pentafluoroethane (R125). R32 is a good additive to the next generation refrigerant hydrofluoroolefin due to low GWP (675) and superior thermodynamic properties. But the separation of R32 and R125 by conventional distillation is a challenge because of their near boiling points. In this study, innovative membranes combining metal-organic framework (MOF) and ionic liquid (IL) are applied to the recovery of valuable R32 from R410A and demonstrate excellent R32/R125 separation performance. [C 2 mim][BF 4 ] was embedded into the nanocages of ZIF-8 through a impregnation strategy to prepare ZIF-8@[C 2 mim][BF 4 ]/Pebax mixed-matrix membranes (MMMs). Characterization results confirmed that IL was successfully added to the nanocages of ZIF-8. ZIF-8@[C 2 mim][BF 4 ]/Pebax MMMs with 10 wt% loading exhibits the best separation performance, increasing R32 permeability and R32/R125 selectivity by 177% and 150% compared to neat Pebax membrane. The ZIF-8 @ [C 2 mim][BF 4 ] material by impregnation has excellent performance in regulating the effective cage size of MOF, providing new strategies for designing more accurate and efficient MMMs.
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SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Yi Huang,Chenyang Zhao,Yue Li,Chen Wang,Wenlin Yuan,Tao Shen,Jie Liu,Di Cheng,Chunchun Wu,Qianhong Shen,Hongliang Ding,Siyuan Chen,Hui Yang
Integration of both passive and active corrosion-protecting mechanisms is an effective method for endowing sol-gel derived coatings with long-term anticorrosion performance. To provide “smart” functionality for sol-gel coating, a novel self-healing nanocontainer is fabricated via the in-situ growth of 1H-benzotriazole-inbuilt zeolitic imidazolate framework (BTA-ZIF-8) on hydroxylated hexagonal boron nitride nanosheets (BN-OH), which exhibits efficient pH-dependent inhibitor release behavior at both acidic and alkaline media. Electrochemical measurements reveal that sol-gel coating containing the BTA-ZIF-8@BN-OH nanocontainers exhibits superior anticorrosion performance and long-term corrosion protective capability, with |Z| 0.01Hz increased by nearly three orders of magnitude (∼2 × 10 8 Ω·cm 2 ) compared to that of pure sol-gel coating after 28 days of saline solution immersion. In addition, the EIS measurements on sol-gel coating surfaces with artificial scratches show increased impedance values after prolonged immersion in saline solution, indicative of effective active inhibiting effect. This phenomenon is the result of the synergistic effect of both passive and active corrosion protection . The active protection (inhibiting effect) is provided by the on-demand release of inbuilt BTA inhibitor from ZIF-8 frameworks, whereas the passive protection (barrier performance) is achieved through the “labyrinth effect” of BN-OH nanosheets as well as the improved interfacial compatibility of nanocontainers with surrounding sol-gel matrix by surface hydroxylation of h-BN nanosheets. This nanocontainer design offers a facile strategy for fabricating self-healing sol-gel coatings with the exceptional anticorrosion properties.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
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IF 6.6
Lei Ling,Shu Cai,You Zuo,Tengfei Meng,Hao Tian,Xiaogang Bao,Guohua Xu
Recently, superhydrophobic coating modified magnesium alloys are extensively utilized for anti-corrosion, anti-fouling and anti-bioadhesion fields due to their unique surface characteristics. However, lack of antibacterial and osteogenic properties have restricted the development of medical magnesium alloys for clinical implantation. Here, a facile superhydrophobic wettability transformation strategy is proposed to impart medical magnesium alloys with outstanding corrosion resistance , protection against bacterial infection and promotion of osteogenesis process. The copper (Cu 2+ )-doped zeolitic imidazolate frameworks-8 (ZIF-8) coatings were synthesized upon the surface of HA-modified Mg alloy via solvothermal method and then followed hydrophobic treatment in a mixed ethanol solution of dodecyl mercaptan (DDM) and myristic acid (MA) to obtain superhydrophobic properties. This particular superhydrophobic coating can be irradiated by visible light to make ligand-to-metal charge transfer produce photoelectrons and be captured upon the Cu@ZIF-8 coating surfaces as paramagnetic Zn 2+ sites, and then generated reactive oxygen species which can scavenge off the reductive dodecyl mercaptan, thus converting to hydrophilic. This wettability transition allows for the regulation of implant surface properties according to the functional requirements of the implant at different clinical stages. Furthermore, the composite coatings modified Mg alloy after wettability transformation from superhydrophobic to hydrophilic can significantly kill pathogenic bacteria and promote osteoblast attaching behavior.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 34
·8216-8227
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IF 7
Zhipeng Yuan,Jing Zhang,Xinfu Zhao,Sijia Liu,Shimo Yu,Xiaochan Liu,Xinen Zhang,Xibin Yi
Rapid and safe disinfection and exudate management are two major challenges in infected wound care. Therefore, in this work, we developed a novel wound dressing via encapsulating ZIF-8-derived carbon nanoparticles in a hydrophilic nanofiber sponge to address severe wound infection and heavy exudate problems. The dressing can effectively kill bacteria through chemo-photothermal synergistic therapy. Meanwhile, the hydrophilic nanofiber sponge can quickly absorb wound exudate around the wound and accelerate the evaporation rate of liquid through the photothermal effect and its own structure; therefore, it is possible to remove excess liquid and regulate its wetness. In this way, it prevents the problem of wound overhydration often caused by hydrophilic dressings. In our experiment, the dressing showed good antibacterial performance and biocompatibility in vitro and could effectively control wound infection, absorb wound exudate and promote skin wound healing in vivo. Its good therapeutic effect is not only due to effective infection control and wound exudate management, but also because the structure of nanofibers similar to an extracellular matrix provides basic physical support and structural signals conducive to skin tissue regeneration.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2023
·
IF 5.2
Xiaoqian Li,Xiaohua Jia,Jin Yang,Yong Li,Hongliang Lin,Haojie Song
Existing research on interfacial interactions of recyclable carbon fiber reinforced poly(hexahydrotriazine) (PHT) composites has mainly focused on the study of reinforcing fibers, ignoring the wide range of applications of matrix in advanced friction materials. Herein, polyhedral ZIF-8 was grown in-situ on the GO surface (named as ZIF-8@GO) to improve the load-bearing capacity of GO nanosheets. The ZIF-8@GO with zinc ions and imidazole ions were embedded as interlaminar reinforcement into matrix to construct a non-covalent cation-π interaction with indole-based PHT (In-PHT) matrix, which significantly enhanced the toughness and tensile strength (reached 215.5 MPa) of composites. With the incorporation of armor-shaped ZIF-8@GO reinforcement, compared with the composite without ZIF-8@GO, the wear track width was significantly decreased by 50%. Moreover, the worn surface lubricated by this composite exhibited efficient self-healing property due to the introduction of the polyethylene wax (PEW), and the healed average friction coefficient showed slight changes. Extensive analyses verify that the ZIF-8@GO structure and cation-π interactions across multiscale interfaces can enhance both mechanical strength and wear resistance of recyclable carbon fiber reinforced In-PHT composites (In-PHT-CFRPs). Highlights ZIF-8@GO was embedded as interlayer reinforcement to improve wear resistance. Cation-π interaction across interface enhances interface carrying capacity. Due to strong cation-π bonding, IPEZGC exhibits outstanding tensile strength. PEW was embedded as healing agent to obtain self-healing property.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jihao Su,Yu Zhang,Yuntong Meng,Xiaohui Guan,Min Lu
Supercapacitors , with their potential to revolutionize energy storage and usage, are an encouraging electrochemical energy storage technology. In this field, metal-organic framework (MOF) is considered as an excellent precursor and self-sacrifice template for synthesizing high performance electrode materials. On the outside of CoNi-MOF hollow spheres, zeolitic imidazolate framework (ZIF-67) is epitaxially grown to form a hierarchical porous structure. Then, a bit of nickel ions are added for etching and precipitation reactions, so that the structure can be further processed. The specific capacitance of CoNi@ZIF-LDH composite can achieve 1488 F g −1 at a current density of 1 A g −1 , and it has complete reversibility after 3000 cycles (cycle efficiency is 83.87 %). In addition, the maximal energy density of CoNi@ZIF-LDH//AC HSC is 49.8 Wh kg −1 when the power density is 800 W kg −1 . Meanwhile, it shows remarkable cycle durability (the capacitance retention rate is 94.85 % after 5000 cycles). This unique electrochemical property is primarily related to the establishment of hierarchical porous structures and the subsequent structural change produced by the site-directed transformation strategy. The special structural design and optimization of MOF materials provide a more convenient, more expandable, and more promising new idea for preparing high-efficiency electrode materials.
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RSC Advances
·
2018
·Vol. 8
·期 63
·36114-36122
·
IF 2.936
Hailin Guo,Yifan Wang,Chaofeng Li,Keqing Zhou
In this work, sandwich-like structured CoAl-LDH@ZIF-67 hybrids were constructed by in situ growth of nanosized ZIF-67 crystallites on CoAl-LDH nanoplates. The structure and morphology of CoAl-LDH@ZIF-67 hybrids were represented by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Transmission Electron Microscopy (TEM). Accordingly, the hybrids were introduced into epoxy resins to explore their effect on the thermal and fire safety properties of epoxy composites. With the introduction of 2% CoAl-LDH@ZIF-67 hybrids, the T10%, T50% and Tmax values were decreased to some extent and the char residue yield was higher than that of pristine epoxy. The peak heat release rate (PHRR) of epoxy composites declined by 26.4%, in comparison with those of pure epoxy. Moreover, the quantity of smoke produced, toxic CO released and CO2 produced were suppressed markedly and decreased by 16.7%, 59.8% and 32.2%, respectively. A possible mechanism for improving fire safety was put forward based on the analysis of the carbon residues.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 35
·1802830
·
IF 13.325
Huiyuan Zhang,Qian Li,Ruiling Liu,Xinke Zhang,Zhonghao Li,Yuxia Luan
Zeolitic imidazolate framework-8 (ZIF-8) is an attractive metal organic framework (MOF) in drug delivery. Strong interaction between drugs and ZIF-8 is essential for high drug loadings through in situ construction of MOFs. However, only limited drugs with unique functional groups ( COOH, SO 3 H, et al.) can interact with ZIF-8 and be encapsulated satisfactorily so far. Drugs without these functional groups are difficult to be loaded due to the lack of strong interaction. Herein a versatile prodrug strategy is proposed to solve the problems encountered by MOFs. Cytarabine (Ara) is chosen as a model drug since it cannot be loaded in ZIF-8 satisfactorily by itself. New indocyanine green (IR820) is utilized to bond with Ara for the formation of prodrug (Ara-IR820) and endows the prodrug with fluorescence imaging-guided chemo-photothermal therapy, in which sulfonic groups strengthen the interaction between prodrug and ZIF-8. This prodrug loaded ZIF-8 is further functionalized with hyaluronic acid (HA) to result in active-targeting HA/Ara-IR820@ZIF-8 nanoparticles. The in vitro and in vivo results demonstrate its excellent visual cancer therapy with tumor-targeted and pH-responsive release behavior. This design offers a new concept to solve the drug loading problem of MOFs, exhibiting a flexible strategy to expand the biomedical applications of MOFs.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Na Wang,Xiang Zhou,Youming Dong,Ying Zhang,Rong Liu,Haijiao Kang,Kaili Wang,Jianzhang Li
Natural mildew preventives, like citral, have great potential to protect bamboo from mildew, while their long-lasting antimildew performance is yet to be challenged owing to their oxidability and volatility. Inspired by biomimetic mineralization, in this work, citral@ZIF-67 particles were synthesized by encapsulating citral into a zeolite imidazolate framework-67 (ZIF-67) cage and introduced into a bamboo structure. Benefiting from the unique cage structure and large surface area of ZIF-67, it can encapsulate sufficient citral molecules. The encapsulation reduced the particle size of ZIF-67 due to the nucleation of citral. Furthermore, the surface area, pore size, and volume of citral@ZIF-67 particles gradually decreased with the increase in loading amounts of citral. ZIF-67 exhibited a certain antibacterial ability against E. coli and S. aureus. The encapsulation of citral can further enhance the antibacterial activity of ZIF-67. In addition, the citral@ZIF-67 showed slow-release performance that followed the Fickian diffusion mechanism. After the citral@ZIF-67 treatment, bamboo showed no mold spots on the surface with an infection grade of 0, which was retained, even though bamboo was conditioned at 50 °C and 85% relative humidity for 10 days. This proposed method can effectively improve the stability of natural mildew preventives and endow bamboo with long-term antimildew properties with low cost and minimized environmental impacts.
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IONICS
·
2024
·Vol. 30
·期 10
·6705-6718
·
IF 2.4
Ullah Mohib,Ganesan Subbulakshmi,Kumari Bharti,Zafar Mariam,Yusuf Kareem,Hussein Shaymaa Abed,Issa Salman Khalaf,Alsultany Forat H.,Singh Manmeet,Zhengxin Li,Ullah Sami
The detrimental effects of nitrite (NO 2 − ) on environment as well as living organisms have attracted immense interest to sensitively detect it in the drinking water system. So, for this purpose, we have developed a highly sensible and portable colorimetric NO 2 − sensor based on the CZ-2 nanocomposite (NC). The three dimensional (3D) with large hierarchical structure CZ-2 NC sensor was formed by the coupling of g-C 3 N 4 nanosheets (NSs) and ZIF-67 nanoparticles (NPs) by a simple hydrothermal process. The prepared sensor was successfully employed to detect NO 2 − , which manifests higher sensing characteristics like extensive sensitivity with large detection linear range of (1 × 10 −3 –7.20 × 10 −1 μM) having a R 2 of 0.999 and a lowest limit of detection (LOD) value of 0.16 ± 0.05 nM. Further, it also manifests excellent reversibility, better stability and durability, optimal reproducibility and superior repeatability. In addition, the sensor also depicts large selectivity towards NO 2 − and improved practicability in real water sampling. These commendable sensing properties were mainly ascribed to the large conductive structure and highest surface area of the CZ-2 NC structure. Thus, as a result, we analyzed that our fabricated colorimetric sensor was highly potent, its applications in the sensing fields can be explored for future perspective.
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