SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Zijun Yu,Fujiang Geng,Mengjie Han,Dudu Li,Zibo Yang,Zhihua Qiao
6FDA-APBIA was in-situ incorporated into the ZIF-9 framework via coordination bonds. • 6FDA-APBIA incorporation effectively increased the ultra-microporous volume of ZIF-9. • polyZIF-9 based MMMs exhibit excellent H 2 /CH 4 and CO 2 /CH 4 separation performance. • pZ9–30 MMM shows 2.2-fold (H 2 /CH 4 ) and 1.4-fold (CO 2 /CH 4 ) selectivity over pure PI. • pZ9–30 MMM has good interfacial compatibility and long-term operational stability. Mixed-matrix membranes (MMMs) have broad application prospects in the field of gas separation, particularly for the efficient separation of H 2 /CH 4 and CO 2 /CH 4 , which is of great significance for hydrogen energy recovery and natural gas purification. This study proposes a strategy to in situ incorporate 6FDA-APBIA polymer into the ZIF-9 framework via coordination bonds, constructing polyimide-based ZIF-9 materials (pZ9) with tunable pore structure. The characterization results confirm that the appropriate incorporation of polymer increased the ultra-microporous volume of ZIF-9 for achieving molecular sieving. Furthermore, pZ9 materials were used as fillers to prepare self-supported MMMs with varying loadings. Notably, the gas permeation tests revealed that the MMM with 30 wt% pZ9 loading exhibited excellent H 2 /CH 4 and CO 2 /CH 4 separation performance (α H2/CH4 ≈ 328.05, α CO2/CH4 ≈ 95.21), both exceeding the corresponding upper bounds. This work provides insights into the design of high-performance MMMs, showing promise for applications in hydrogen recovery and natural gas purification. Download: Download high-res image (100KB) Download: Download full-size image
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Mingwei Hu,Yongsheng Deng,Rong Guo,Yinghao Jia,Wenpu Zhang,Xinghui Hou,Ying Zhou
Co 3 O 4 -ZIF- x ( x = 0,1,2,3) composites have been prepared by in-situ growth of ZIF membrane on MOFs-derived hierarchical porous Co 3 O 4 by the solvothermal method with adjusting the ratio of dimethylimidazole. The effects of ZIF membrane on Co 3 O 4 structure and acetone-sensing properties are investigated by the techniques of XRD , Raman, SEM, TEM, BET, XPS and performance testing, and the possible gas-sensing enhancement mechanism is analyzed. The results show that the typical Co 3 O 4 -ZIF-1 sensor has the maximum response of 77.8–50 ppm acetone at 180 °C, the short response/recovery time of 7/35 s, and the low detection limit of 0.1 ppm (3.28). It also has the reliable acetone selectivity against to other interfering gases, as well as good repeatability and high stability. Its enhanced acetone-sensing property may be attributed to the synergistic effect of the improved surface state , high specific surface area , adjustable pore size and rich reaction activation sites, which caused by the hierarchical porous structure of MOFs-derived Co 3 O 4 and the gas adsorption and enrichment effect of ZIF membrane, promoting the further reaction and diffusion of acetone. The “internal construction and external modification” role of MOFs playing in Co 3 O 4 provides a new idea for designing high performance sensing materials.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yingjian Ma,Yinmin Wang,Rui Zhao,Zhijie Wang,Shuang Li,Meng Yu,Sen Pang,Xinyu Guo,Yong Xu,Xuemin Wu
Using advanced functional materials and technologies to construct new, efficient, and controlled-release pesticide formulations can effectively improve the target utilization of pesticides and reduce their impact on non-target organisms and the surrounding environment. Herein, we present a strategy for preparing pH-responsive nanodrug delivery systems (Pro@MSN@ZIF-8) by loading a pesticide (prochloraz) into biocompatible mesoporous silica nanoparticles (MSNs) and using acid-unstable Metal–organic frameworks (ZIF-8) as blocking agents. The results showed that Pro@MSN@ZIF-8 was able to release Pro rapidly in acidic environments, with a cumulative release rate of 92.4% at pH= 4.5 after 72 h, which was much higher than that at pH= 7.4 (39.7%). Additionally, Pro@MSN@ZIF-8 had longer-lasting fungicidal activity than Pro-technical. Safety tests showed that Pro@MSN@ZIF-8 has a low impact on non-target organisms and the surrounding environment. The EC 50 of Pro@MSN@ZIF-8 nanoparticles for aquatic Daphnia magna was 4.128 mg/L, which was approximately 1.4 times that of Pro-technical (3.027 mg/L) at 96 h. Moreover, it was less harmful to the soil microbial community and human LO2 liver cells. Pro@MSN@ZIF-8 can provide small amounts of trace elements required by plants to promote crop growth without disturbing normal growth. Therefore, this study provides an effective strategy to improve the efficiency of pesticide use and reduce environmental hazards, which are required for cleaner, environmentally friendly, and more efficient agricultural production.
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ACS Omega
·
2023
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IF 4.1
Jia Gao,Wenhui Chu,Xuankai Ding,Lingzhi Ding,Qing Guo,Yongqian Fu
Nanosized zeolitic imidazolate framework particles (ZIF-8 nanoparticles [NPs]) have strong potential as effective carriers for both in vivo and in vitro protein drug delivery. Synthesis of ZIF-8 and stability of protein encapsulation within ZIF-8 are affected by several factors, notably the metal ion source and molar ratio. To systematically investigate these factors, we investigated such effects using BSA as a model test protein to synthesize BSA@ZIF-8 NPs at various metal-to-ligand (M:L) ratios. SEM, FTIR, XRD, and DLS were applied to characterize the morphology and structure of BSA@ZIF-8 NPs and their effects on protein loading capacity. Degradation kinetics and protein release behavior of BSA@ZIF-8 NPs were evaluated at pH 5.0 (to simulate the tumor environment) and pH 7.4 (to mimic the blood environment). Our objective was to define optimal combinations of the high protein loading rate and rapid release under varying pH conditions, and we found that (i) the yield of BSA@ZIF-8 NPs decreased as the M:L ratio increased, but the protein content increased. This highlights the need to strike a balance between cost-effectiveness and practicality when selecting ZIF-8 NPs with different molar ratios for protein-based drug formulation. (ii) BSA@ZIF-8 NPs exhibited cruciate flower-like shapes when synthesized using Zn(NO3)2 as the zinc precursor at M:L ratios of 1:16 or 1:20. In all other cases, the NPs displayed a regular rhombic dodecahedral structure. Notably, the release behavior of the NPs did not differ significantly between these morphologies. (iii) When Zn(OAc)2 was used as the zinc precursor, the synthesized ZIF-8 NPs exhibited a smaller size compared to the Zn(NO3)2-derived ZIF-8 NPs. (iv) The release rate and amount of BSA protein were higher at pH 5.0 compared to pH 7.4. (v) Among the different formulations, BSA@ZIF-8 with an M:L ratio of 1:16 at pH 5.0 was observed to have a shorter time to reach a plateau (0.5 h) and higher protein release, making it suitable for locally rapid administration in a tumor environment. BSA@ZIF-8 prepared from Zn(OAc)2 at an M:L ratio of 1:140 showed the slower release of BSA protein over a 24-h period, indicating its suitability for sustained release delivery. In conclusion, our findings provide a useful basis for the practical application of ZIF-8 NPs in protein-based drug delivery systems.
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PubMed
高影响因子
TALANTA
·
2023
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IF 6.1
Meng Zhang,Jianhong Zhang,Xin Che,Jingjing Jiang,Qin Tu,Jinyi Wang
As one of the essential trace elements in life activities, copper ion (Cu 2+ ) plays a very important role in human health. However, copper-containing pesticides are usually used for sterilization and disinfestation in agriculture. Thus, the residues of copper-containing pesticides in agricultural samples increase the risk of excessive intake of Cu 2+ for human. The development of an effective method for detecting Cu 2+ is still an important task. Herein, a detecting system based on AuNCs@ZIF-8 modified paper and smartphone platform was developed for visual detection of Cu 2+ in agricultural samples. Herein, a detecting system based on AuNCs@ZIF-8 modified paper and smartphone platform was developed for visual detection of Cu 2+ in agricultural samples. In the detecting system, gold nanoclusters (AuNCs) were packaged by ZIF-8 to limit their molecular motion and enhance the fluorescence effectively. In the meanwhile, by ultrasound-assisted biomimetic mineralizing, AuNCs@ZIF-8 composites were uniformly synthesized in situ on the surface of the paper fibers to indicate Cu 2+ by fluorescence quenching . A portable visual monitoring system consisted of the prepared Cu 2+ paper sensor and a smartphone platform was then successfully built and applied to on site detecting Cu 2+ in agricultural samples. The limit of detection (LOD) was 4.57 μM and recovery rate varied from 96.50 % to 121.58 %. The developed detecting system for Cu 2+ has the advantages of easy preparation and operation, and is very suitable for the use in agricultural products and farmland.
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Scientific Reports
·
2023
·Vol. 13
·期 1
·1-13
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IF 4.6
Chakari-Khiavi Forough,Mirzaie Arezoo,Khalilzadeh Balal,Yousefi Hadi,Abolhasan Rozita,Kamrani Amin,Pourakbari Ramin,Shahpasand Koorosh,Yousefi Mehdi,Rashidi Mohammad-Reza
Alzheimer’s disease (AD) is a progressive brain disorder characterized by the ongoing decline of brain functions. Studies have revealed the detrimental effects of hyperphosphorylated tau (p-tau) protein fibrils in AD pathogenesis, highlighting the importance of this factor in the early-stage detection of AD conditions. We designed an electrochemical immunosensor for quantitative detection of the cis conformation of the p-tau protein ( cis -p-tau) employing platinum nanoparticles (Pt NPs) supported on zeolitic imidazolate frameworks (ZIF) for modifying the glassy carbon electrode (GCE) surface. Under optimum conditions, the immunosensor selectively and sensitively detected cis-p-tau within the broad linear range of 1 fg mL −1 to 10 ng mL −1 and the low limit of detection (LOD) of 1 fg mL −1 with desired reproducibility and stability. Furthermore, the fabricated immunosensor's performance was examined for the cis-p-tau analysis in the serum of AD patients, indicating its accuracy and feasibility for real-sample analysis. Notably, this is the first application of Pt@ZIF-8 nanocomposite in fabricating a valid immunosensor for selective cis-p-tau detection, even in the presence of trans-p-tau. It is worth mentioning that the enzyme-linked immunosorbent assay (ELISA) reference technique is not able to evaluate pico- or femtomolar concentrations of cis-p-tau, making the fabricated immunosensor superior for early-stage measurement and screening of AD.
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高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 44
·6015-6020
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IF 3.1
Shanshan Liu,Nian Wang,Li Li,Yi Liu
Diseases such as liver cancer, extrahepatic biliary obstruction and osteocarcinoma are closely associated with the abnormal level of alkaline phosphatase (ALP). Hence, it is essential to develop a convenient assay to detect ALP activity. Herein, a novel signal-on fluorescent biosensor on account of the fluorescence signal of the aggregation-induced emission (AIE) fluorochrome 2,2′,2′′,2′′′-((ethene-1,1,2,2-tetrayltetrakis(benzene-4,1-diyl))tetrakis(oxy))tetraacetic acid (EBTAC) encapsulated zeolitic imidazolate framework-8 (ZIF-8@EBTAC) was designed to monitor ALP. Due to the aggregation-induced emission of EBTAC, the synthetic ZIF-8@EBTAC shows robust fluorescence. Once pyrophosphate (ppi) was added, its complexation with Zn2+ in ZIF-8 triggered the collapse of the ZIF-8 framework, releasing encapsulated EBTAC molecules and restoring to free state, leading to the dramatical decrease in fluorescence. ALP could catalyze the hydrolysis of ppi to phosphate (pi), which is difficult to bind to Zn2+ and has little effect on the fluorescence of ZIF-8@EBTAC. Therefore, with the assistance of the substrate ppi, the ultimate fluorescence of ZIF-8@EBTAC was positively related with ALP activity. The constructed biosensor was able to monitor the ALP activity well from 0.01 to 100 U L−1, and a detection limit of 0.01 U L−1 was achieved. Based on the ability of EBTAC serving as a fluorescent probe with aggregation-induced luminescence properties, this proposed design can be applied to diverse targets and provide new ideas for the establishment of fluorescent biosensors.
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Materials Today Communications
·
2023
·
IF 3.8
Wei Chen,Fucheng Yun,Shenyi Zheng,Chen Shi,Jian Han
In this study, a simple two-step preparation method was used to prepare a new type of composite fiber adsorbent, metal–organic framework/chitosan/hydroxyapatite (ZIF-8 @CS/HAP), for the efficient removal of Lead ions（Pb(Ⅱ)）from water. The composite fiber was first characterized, and its surface morphology , functional groups, crystallinity, and pore structure were investigated. Subsequently, its optimal use environment was studied, and results found that the adsorbent could achieve the best effect in Pb(Ⅱ) solution with a starting concentration of 200 mg/L at pH ≥ 6 and a temperature of around 298 K. The presence of coexisting ions (Co 2+ , Sr 2+ , Ni 2+ , Cd 2+ , and Cu 2+ ) had no significant effect on the selective removal of Pb(Ⅱ) by ZIF-8 @CS/HAP. The process of ZIF-8 @CS/HAP adsorbing Pb(II) corresponded to the Langmuir model and the pseudo-second-order kinetic model, according to isotherm and kinetic investigations. The adsorption data fitted with the Langmuir model at 298 K reached a fitting degree (R 2 ) of 0.996, and the largest adsorption capacity up to 1058.2 mg/g, which is better than that in most fiber adsorbents. The adsorption mechanism could be attributed to the complexation of hydroxyl and amino groups on the surface of the composite fiber with Pb(Ⅱ), the coprecipitation of phosphate groups with Pb(Ⅱ), ion exchange, and electrostatic adsorption. This study provides an efficient adsorbent for treating Pb(Ⅱ)-contaminated wastewater. Its preparation process is environmental-friendly and easy to use, and it has a high adsorption capacity. Therefore, it has a wide array of potential applications in the field of water treatment.
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Food Packaging and Shelf Life
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2023
·
IF 8
Lihan Wang,Shasha Cheng,Kaiwen Qin,Xinyan Yang,Hao Wang,Chaoxin Man,Qianyu Zhao,Yujun Jiang
Packaging films containing antibacterial substances play a crucial role in controlling contamination caused by food-borne pathogens. Herein, apigenin (APG) was encapsulated in zeolitic imidazolate frameworks 8 (ZIF-8) to achieve a synergistic antibacterial effect and prolonged drug release, aiming to extend the shelf life of food products. Under acidic condition, the release rate of APG reached 73.70 % after 12 h. Subsequently, propolis-gelatin (PG) films were prepared for food packaging. The addition of APG@ZIF-8 enhanced the hydrophobicity of PG films, making them more suitable for food packaging. However, the composite film exhibited reduced damage resistance and flexibility. The composite films demonstrated 100 % inhibition against Staphylococcus aureus and Escherichia coli under appropriate amount of APG@ZIF-8. The composite film coating significantly reduced the bacteria count on apple surfaces by 99.95% during storage, while maintaining their appearance. This study provides an effective way to develop novel antibacterial composite films.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 41
·14973-14981
·
IF 4
Xiangyu Zhang,Hong Li,Yanhui Li,Xianhui Wang,Hongbin Wang,Wenrong Yang,Jingquan Liu,Da Li
To replace the current expensive precious metal catalysts for water electrolysis, it is important to develop inexpensive and powerful bifunctional catalysts for hydrogen production. It is an effective way to improve catalytic performance using excellent templates and elemental doping. Here, a hierarchical structure Fe-Co3S4/MoS2 was synthesized using an Fe–ZIF precursor prepared by ion exchange, followed by hydrothermal sulfuration and annealing. It required overpotentials of only 93 mV and 243 mV to achieve a current density of 10 mA cm−2 in the HER and OER, respectively. It also showed excellent catalytic performance for overall water splitting, requiring only 1.42 and 1.71 V to achieve current densities of 10 and 100 mA cm−2 in 1 M KOH. The catalyst also demonstrated excellent ultra-long-term stability. The superb catalytic performance and stability can be attributed to the Fe doping, exposing more active sites while retaining the highly stable framework of the ZIF. The component modulation of Co3S4 and MoS2 by Fe doping induced high intrinsic activity and excellent transfer coefficients. This work presents a novel approach to prepare noble metal-free catalysts with highly stable rich interfaces and defects for overall water splitting.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Feng Xiao,Yang Zhou,Hao Zhang,Yanhui Wu
Fluoride pollution will cause serious harm to the human ecological environment. The capacitive deionization method for fluoride removal has the advantages of low cost, low energy consumption, and convenient operation. Electrode material is crucial for desalination performance. In this study, a novel manganese doped hollow cubic carbon material (MHCC) was prepared by constructing ZIF-8 with hollow cubic morphology as a precursor and carbonizing it with manganese acetate as a manganese source. Then, the derived MHCC material was characterized and tested for capacitive fluoride removal. The adsorption capacity of MHCC10 (the mass ratio of carbon material to manganese acetate tetrahydrate was 10:1) reached 6.2 mg/g and 25.5 mg/g at the initial NaF concentration of 30 mg/L and 150 mg/L respectively. It could maintain 85.5% of the initial capacity after 10 adsorption–desorption cycles. The CDI defluoridation mechanism of MHCC was analyzed. The hollow porous structure inherited from etched ZIF-8 can promote the formation of electric double layers. An appropriate amount of manganese doping has a pseudocapacitive effect, which helps to increase adsorption capacity and improve cycling performance. This work provides a new approach for the design and preparation of novel capacitive fluoride removal electrode materials.
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CELLULOSE
·
2021
·Vol. 28
·期 5
·3097-3112
·
IF 5.044
Huang Qiumei,Zhao Chuanshan,Li Xia
The separator is a key component of the lithium-ion battery (LIB), which not only prevents the anode and the cathode from contacting, but is also related to the performance of the LIB. However, the widely used polyolefin separator has the disadvantages of inferior electrolyte retention capability and poor electrolyte wettability. Therefore, the development of high-performance separators for LIB has attracted widespread attention. In order to enhance the electrolyte retention capacity of the separator, the bacterial cellulose (BC)/zeolitic imidazolate framework-67 (ZIF-67) composite separator was prepared by introducing ZIF-67 on the BC nanofibers. It was found that the introduction of ZIF-67 in BC membrane significantly improved the pore structure and enhanced the electrolyte retention capability, thus contributing to the transfer of lithium-ion, increasing the ionic conductivity (0.837 mS cm −1 ). In terms of ionic conductivity, BC/ZIF-67 separator has achieved a great improvement compared to polypropylene (PP) separator (0.096 mS cm −1 ). Besides, the prepared BC/ZIF-67 composite separators hardly shrink at high temperatures. The discharge capacity retention of the LIB using BC/ZIF-67 separator was 91.41% after 100 cycles (0.2 C). Meanwhile, LIB with BC/ZIF-67 separator showed a large discharge capacity (156 mAh g −1 ) and improved rate performance. Therefore, the BC/ZIF-67 composite membrane has good development potential in the direction of LIB separator. Graphic abstract
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