JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Xiu-yan Zhang,Ting Wang,Li-guang Wu,Hai-Chang Guo
In order to improve the separation performance and anti-fouling property of polyvinylidene fluoride (PVDF) ultrafiltration membranes, PVDF mixed matrix membranes (MMMs) were obtained by mixing PVDF with Ag@ZIF-8 using a simple one-pot microemulsion strategy. First, both Ag and ZIF-8 were generated in one micelle of the microemulsion during the formation of composites. After in-situ polymerization of microemulsion， the latex containing Ag@ZIF-8 was blended with PVDF by phase-inversion method to construct the MMMs. The small-sized Ag particles were closely distributed on the surface of ZIF-8 after the formation of ZIF-8 in micelles. The subtle interaction forces between the two facilitated the distribution of the composite in the PVDF matrix. In addition, the hydrophilic component in the latex improves the pore structure , the permeation and anti-fouling performance of the PVDF matrix compared to neat PVDF and the MMM with ZIF-8 added. Mixed-matrix ultrafiltration membranes with 0.3 wt% of microemulsion containing Ag@ZIF-8 exhibited good permeation ( J w = 222 L m −2 h −1 ) and flux recovery rate ( FRR = 82%). The well-distributed Ag@ZIF-8 in PVDF polymeric matrix strengthened the dye retention of MMMs from high-salinity wastewater, due to the interaction between Ag@ZIF-8 and dye molecules. This mixed-matrix ultrafiltration membrane also showed optimum dye rejection (97.3%) and low salt rejection (0.2%). The MMMs combined with Ag@ZIF-8 in this work are promising for the removal of dye contaminants for high-salinity wastewater, so as to achieve the goal of advanced treatment for high-salinity wastewater.
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PROGRESS IN ORGANIC COATINGS
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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 Water Process Engineering
·
2022
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IF 7.34
Yu Zhang,Hong Zheng,Pengyi Zhang,Qi Zuo,Baichao Zhang,Xueying Ren
The deep purification of trace heavy metals in drinking water is of great significance and has received considerable attention worldwide. 2,5-dimercapto-1,3,4-thiadiazole (DMTD) functionalized magnetic ZIF-8 adsorbent (Fe 3 O 4 @ZIF-8-DMTD) using a novel one-pot post coordination modulation method at room temperature could effectively adsorb trace heavy metals from drinking water through cooperating with the abundant functional groups and surface charges. The negative surface charges promoted the rapid accumulation of trace heavy metals on the surface of the adsorbent, meanwhile, the abundant thiol/nitrogen sites contributed to their adsorption, thus the adsorption rate and adsorption capacity of trace heavy metals were greatly improved. For trace Pb(II) (150 ppb), the effluent concentration could meet the World Health Organization (WHO) standard (≤10 ppb) within 10 s after adsorption by Fe 3 O 4 @ZIF-8-DMTD, and the cumulative adsorption capacity that met WHO standard was 12.11 mg/g. Fe 3 O 4 @ZIF-8-DMTD also showed high stability in a broad pH range and excellent adsorption performance in a wide low concentration range. The effluent concentration still could meet the WHO standard when the initial Pb(II) concentration was 11.70 ppm, and the corresponding adsorption capacity reached 35.00 mg/g. Moreover, the capture experiments for multiple heavy metals that coexisted in tap water showed that the effluent concentrations of Hg(II), Pb(II), Cu(II), Cd(II), and Cr(III) could be lower than the allowable limits in a few minutes. The adsorbent could also be easily recovered using magnets and regenerated by thiourea solution, which showed great application potential for the purification of trace heavy metals in drinking water.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
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IF 9.221
Xia Zhou,Xiaoling Lin,Haiqiu Huang,Ping Li,Jiamin Wu,Xueqin Huang,Huaihong Cai,Hai Han,Junxia Zheng,Haibo Zhou
Visual, highly selective, and sensitive detection of sulfur dioxide (SO 2 ) and its derivatives (SO 3 2- ) in vitro/in vivo is of great significance in maintaining cell homeostasis. A new Au@Ag@ZIF-8 optical sensor with o-phenylenediamine (OPD) internal coding surface-enhanced Raman scattering (SERS) tags based on the free radical reaction was synthesized for multi-mode detection of sulfite . First, Co 2+ is oxidized to Co 3+ . Second, the oxidoreduction between SO 3 2- and Co 3+ produces SO 4 -• and Co 2+ to complete the cycle. The resulting SO 4 -• is further reacted with the chromogenic substrate OPD to form the polymer. Due to the UV–vis absorbance of OPD polymer being stronger than that of OPD, but the fluorescence intensity is lower, and their Raman peaks are obviously different, this sensor can be used for the detection of SO 3 2- through colorimetric, fluorescence, and Raman multi-mode. The main advantages are as follows: (1) high selectivity; (2) achieve fast, visual, and highly sensitive detection of SO 3 2- , and the low limit of detection (LOD) is 1 nM; (3) improve the reliability of detection and expands the detection range (1 nM-800 μM); (4) demonstrate the applicability in recognizing SO 3 2- in HeLa cells to provide accurate information on the dynamic distribution of sulfur in cells.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 2
·1-12
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IF 6.408
Li Guofu,Xie Guoqiang,Gong Chong,Chen Di,Chen Xing,Zhang Qian,Dong Hongzhou,Zhang Yingchao,Li Chengjie,Hu Jing,Chen Yingjie,Yu Liyan,Dong Lifeng
Chains of nickel nanoparticles coated with few nitrogen-doped graphitic carbon layers (Ni@NC) are synthesized by hydrogen-assisted pyrolysis of Ni-ZIF. Hydrogen and temperature can play key roles in the formation of oriented Ni@NC nanoparticle chains, and carbon shells can protect Ni nanoparticles from external oxidation and aggregations. Under the optimized potential (0.60 V vs. Ag/AgCl), the Ni@NC7H nanoparticle chains obtained at 700 °C under H 2 /Ar atmosphere (Ni@NC7H) demonstrate outstanding performances, such as high sensitivity of 1.44 mA mM −1 cm −2 (RSD = 1.0%), low detection limit of 0.34 μM (S/N = 3), broad linear range from 1 μM to 1.81 mM, and excellent application potential in artificial sweat and human serum. Therefore, the findings above indicate that this study will provide a general methodology for the synthesis of chains-like core–shell nanoparticle electrocatalysts for non-enzymatic glucose detection. Graphical abstract
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PubMed
高影响因子
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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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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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 SOLID STATE CHEMISTRY
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2023
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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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MICROCHEMICAL JOURNAL
·
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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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
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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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危险品化学品经营许可证（带存储）